πŸ“‹ Drywall Calculator

Calculate the number of 4Γ—8 Sheetrock sheets, buckets of joint compound (mud), drywall tape, screws, and corner bead for any room. Know your costs before calling a contractor.

Room Dimensions

Standard US ceiling heights: 8 ft (older homes), 9 ft (modern), 10 ft (luxury)
Each standard door β‰ˆ 21 sq ft
Each std window β‰ˆ 12 sq ft
Β½" 4Γ—8 sheet avg ~$15 at Home Depot/Lowe's

πŸ“¦ 1 sheet of 4Γ—8 drywall = 32 sq ft. Our calculator adds 10% waste and automatically subtracts door and window openings. Standard 5-gallon bucket of joint compound covers about 200–300 sq ft.

Materials Estimate

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Enter room dimensions and click Calculate to see your complete drywall materials list.

πŸ“ Common Room Drywall Estimates (9 ft ceilings, walls + ceiling)

Room SizeTotal AreaSheets (4Γ—8)Joint CompoundTape Rolls
Bathroom (5Γ—8)~190 sq ft7 sheets1 bucket2 rolls
Bedroom (10Γ—12)~460 sq ft16 sheets2 buckets3 rolls
Living Room (15Γ—20)~810 sq ft28 sheets3 buckets5 rolls
Full Home (1,500 sq ft)~3,500 sq ft120 sheets12 buckets18 rolls
Full Home (2,000 sq ft)~4,500 sq ft155 sheets16 buckets24 rolls

Frequently Asked Questions

How many sheets of drywall do I need for a 12Γ—12 room?
For a 12Γ—12 room with 9 ft walls: Wall area = (12+12+12+12) Γ— 9 = 432 sq ft. Ceiling = 12Γ—12 = 144 sq ft. Total = 576 sq ft. Less 1 door (21 sq ft) and 2 windows (24 sq ft) = 531 sq ft net. Add 10% waste = 584 sq ft. Divide by 32 (per sheet) = 19 sheets. Use our calculator above for instant results!
What thickness drywall should I use?
Β½" (half-inch) drywall is the US standard for most residential walls and ceilings. Use ⅝" (5/8") Type X for garages, furnace rooms, and any wall requiring a 1-hour fire rating (required by most US building codes between garage and living space). Use ΒΌ" for curved walls or as a repair overlay over existing drywall.
How much joint compound (mud) do I need?
A standard 5-gallon bucket of all-purpose joint compound covers approximately 200–300 sq ft of drywall surface with 3 coats (tape coat, filler coat, finish coat). For a typical bedroom (~460 sq ft total area), plan on 2 buckets. Buy one extra for touch-ups β€” unopened buckets last 9–12 months.
How many drywall screws do I need per sheet?
Plan on approximately 32 screws per 4Γ—8 sheet (roughly 1 screw per square foot). Screws go every 16 inches along studs on field areas and every 12 inches at edges. A 5 lb box of 1-5/8" coarse thread drywall screws (about 350 screws) covers about 10 sheets. Our calculator estimates 1 lb of screws per 50 sq ft of drywall.
How much does drywall installation cost in the US?
In 2025–2026, drywall installation costs in the US average $1.00–$3.00 per sq ft for labor only (hang, tape, mud, and finish). A full room with materials typically runs $1.50–$4.00 per sq ft all-in. A 12Γ—12 bedroom might cost $700–$2,000 installed professionally. DIY drywall saves 50–70% since labor is the biggest cost. Material costs alone run about $15–$20 per 4Γ—8 sheet.
What is corner bead and how much do I need?
Corner bead is a metal or vinyl strip applied to all outside corners of drywall to create a straight, durable edge. You need one piece (typically sold in 8 or 10 ft lengths) per outside corner. For a standard room, count the number of outside corners (typically 0–4 for interior rooms, more for rooms with pop-outs or columns). Our calculator estimates corner bead based on ceiling height and number of walls.

Complete Guide to the Cost to Hang and Finish Drywall per Square Foot 2026

In 2026, the US real estate and residential construction sectors are navigating a highly dynamic economic landscape. Property owners, builders, and real estate developers across the nation are focused on cost control, material optimization, and high-efficiency home remodeling projects. Whether you are finishing a basement in Columbus, Ohio, remodeling a classic historic home in Savannah, Georgia, or constructing a new multi-family residence in Austin, Texas, drywall remains one of the most critical elements of interior construction. However, predicting overall construction expenses has become increasingly complex due to fluctuating labor rates, energy costs, and shipping logistics. Currently, the average cost to hang and finish drywall per square foot 2026 remains a primary concern for project managers aiming to establish a reliable sheetrock cost estimator home improvement budget before breaking ground.

Calculating the exact volume of materials for a project is the first line of defense against budget overruns. For generations, professional contractors and DIY enthusiasts alike have asked the basic question: how many 4x8 sheets of drywall do i need for a room? While this seems like a simple calculation, the actual process involves understanding ceiling heights, subtracting doors and windows, choosing the right sheet dimensions, selecting the appropriate fasteners, and purchasing the right amount of joint compound and tape. Without a structured estimation system, builders risk purchasing too much materialβ€”which leads to waste and storage issuesβ€”or too little material, resulting in costly mid-project trips to Home Depot or Lowe's. To address this, developers rely on comprehensive estimators that calculate everything simultaneously, factoring in a standard drywall wastage factor allowance estimation to account for cuts, room corners, and layout variances.

In the United States, building codes and regional climate conditions dictate the specific types of materials used. From moisture-prone bathrooms requiring specialized water-resistant boards to garages requiring fire-rated panels to meet strict safety guidelines, selecting the right material is essential. Modern construction standards set by the Department of Housing and Urban Development (HUD), the Federal Housing Administration (FHA), the Department of Veterans Affairs (VA), and the Environmental Protection Agency (EPA) influence the specification of these materials. In this guide, we provide an in-depth breakdown of material types, estimation methods, costs, and installation procedures, giving you the knowledge needed to manage your project successfully.

πŸ’‘ Industry Insight: According to 2026 US housing data, labor represents 65% to 75% of the total cost of a drywall project. Homeowners who handle the hanging themselves and hire a professional only for the taping and finishing can save up to 50% of the total labor cost while ensuring a high-quality surface ready for paint.

Deciding Between Drywall Thickness Standard 1 2 vs 5 8 Inch Walls Ceiling Options

Selecting the correct drywall thickness is a key structural and safety decision. Gypsum boards are manufactured in various thicknesses to meet different demands for strength, fire protection, weight, and sound control. Using the wrong thickness can result in sagging ceilings, poor sound insulation, or building code violations.

Deciding Between Drywall Thickness Standard 1 2 vs 5 8 Inch Walls Ceiling Performance and Use Cases

The primary choice in residential building is the drywall thickness standard 1 2 vs 5 8 inch walls ceiling comparison. The 1/2-inch drywall is the standard for most interior residential walls. It is light enough for easy installation, compatible with standard wood studs spaced 16 inches on center, and strong enough to support standard wall decorations. For most living rooms, bedrooms, and dining areas, 1/2-inch drywall is the default choice.

However, for ceilings and high-traffic areas, 5/8-inch drywall is often superior. The extra thickness provides greater rigidity, which prevents the panels from sagging between ceiling joistsβ€”especially when joists are spaced 24 inches on center. Sagging is a common issue when 1/2-inch boards are installed on ceilings with heavy insulation on top. Additionally, 5/8-inch drywall (frequently specified as Type X) offers much better soundproofing and fire protection, making it the required choice for fire-barrier walls and ceiling assemblies under building codes.

Other thicknesses are used for specific situations. The 1/4-inch drywall is highly flexible and is primarily used to cover curved walls or as an overlay over existing damaged plaster or drywall. The 3/8-inch drywall is a common choice for repairs or in manufactured housing where weight limits are strict. For standard home construction, however, the choice is between 1/2-inch and 5/8-inch boards.

Understanding Drywall Sheet Weight and Size Dimensions Standard US Configurations

Understanding drywall sheet weight and size dimensions standard us specifications is important for logistics, safety, and determining how much weight your framing can support. Drywall is heavy, and handling it requires physical strength and proper lifting techniques. The table below shows standard weights and dimensions for common residential drywall panels:

Thickness Standard Size Average Weight per Sheet Common Application
1/4 Inch 4 ft x 8 ft 38 lbs Curved walls, overlay repairs
3/8 Inch 4 ft x 8 ft 45 lbs Repair overlays, manufactured homes
1/2 Inch (Standard) 4 ft x 8 ft 51 lbs Standard interior residential walls
1/2 Inch (Lightweight) 4 ft x 8 ft 38 lbs Modern residential walls and ceilings
1/2 Inch (Standard) 4 ft x 12 ft 77 lbs Long walls to minimize joint counts
5/8 Inch (Type X) 4 ft x 8 ft 72 lbs Fire-rated walls, residential ceilings
5/8 Inch (Type X) 4 ft x 12 ft 108 lbs Commercial walls, long ceiling spans

While 4x8 sheets are the most common and easiest to handle, using 4x10 or 4x12 sheets on longer walls can reduce the number of vertical joints by up to 30%. This makes mudding and taping faster and leads to a smoother final finish. However, handling sheets longer than 8 feet usually requires two people and a drywall lift to prevent damage to the panels.

How to Estimate Materials Using a Drywall Calculator Sheetrock Joint Compound Tape Screws System

A drywall project involves several different materials that must be purchased in the correct proportions. A complete takeoff includes the gypsum boards, joint compound (mud), joint tape, screws, and corner beads. Estimating these items together as a drywall calculator sheetrock joint compound tape screws system ensures you have all the necessary supplies before beginning work.

How Many 4x8 Sheets of Drywall Do I Need for a Room? Formulas and Calculation Methods

To determine how many 4x8 sheets of drywall do i need for a room, you must calculate the total surface area of the walls and ceiling, subtract large openings like doors and windows, add a wastage factor, and divide by the square footage of a single sheet (32 square feet for a 4x8 panel). Let's look at the mathematical steps using a standard room as an example:

  1. Wall Area Calculation: First, find the perimeter of the room by adding the lengths of all walls. For a 12x15 room, the perimeter is 54 feet ($12 + 15 + 12 + 15$). Next, multiply the perimeter by the wall height. If the ceiling is 9 feet high, the total wall area is 486 square feet ($54 \times 9$).
  2. Ceiling Area Calculation: If you are drywalling the ceiling, multiply the room's length by its width. For a 12x15 room, the ceiling area is 180 square feet ($12 \times 15$).
  3. Combine Surface Area: Add the wall area and the ceiling area together. The gross surface area is 666 square feet ($486 + 180$).
  4. Subtract Openings: Subtract the area of doors and windows. A standard interior door is about 21 square feet, and a typical window is around 12 square feet. If the room has one door and two windows, subtract 45 square feet ($21 + 12 + 12$). This gives a net surface area of 621 square feet ($666 - 45$).
  5. Apply Wastage Factor: Multiply the net area by 1.10 to add a 10% wastage allowance. This accounts for cut-offs and layout changes. The adjusted area is 683.1 square feet ($621 \times 1.10$).
  6. Determine Sheet Count: Divide the adjusted area by the square footage of a single 4x8 sheet (32 sq ft). This equals 21.34 sheets ($683.1 / 32$). Rounding up to the nearest whole sheet, you will need to purchase 22 sheets.

How to Calculate Joint Compound Mud and Tape Needed for Seams

Joint compound and tape are used to seal joints between sheets and create a smooth wall surface. Knowing how to calculate joint compound mud and tape needed is important, as buying too little mud leads to delays, while buying too much can result in wasted material, as opened buckets of pre-mixed mud can dry out quickly.

A standard rule of thumb is that you need about 0.05 gallons of joint compound per square foot of drywall. This means you will need approximately 5 gallons of mud for every 100 square feet of drywall surface. For our example room requiring 683 square feet of coverage, you will need about 34 gallons of joint compound, or approximately seven 5-gallon buckets. Joint compound is applied in three coats: the taping coat, the fill coat, and the finish coat. Using setting-type compound (often called "hot mud" because of the chemical reaction that occurs as it cures) is common for the first coat because it shrinks less and hardens quickly. Ready-mixed, lightweight compound is often used for the final finishing coats because it is easier to sand.

Joint tape is applied over all joints to prevent cracking. You will need about 0.375 linear feet of tape per square foot of drywall. For a 683 square foot project, you will need approximately 256 linear feet of tape ($683 \times 0.375$). Since standard paper tape rolls are sold in 250-foot and 500-foot lengths, purchasing one 500-foot roll or two 250-foot rolls will provide enough tape with some left over for waste.

How Many Drywall Screws per Sheet Calculation Guide for Fastener Layout

Fasteners hold the drywall panels securely to the framing. According to our how many drywall screws per sheet calculation guide, you should plan for 32 to 36 screws per 4x8 sheet. This spacing is based on building codes, which require screws to be placed every 12 inches along sheet edges and every 16 inches along intermediate studs (referred to as the "field"). For ceiling installations, spacing is tighter, with screws required every 12 inches on all supports to prevent sagging.

The type of screw you choose depends on your framing. Coarse-thread screws are designed for wood studs, while fine-thread screws are engineered for light-gauge steel studs. For 1/2-inch drywall, use 1-1/4 inch screws. For 5/8-inch drywall, use 1-5/8 inch screws to ensure the fastener penetrates the wood stud by at least 5/8 of an inch. For a project requiring 22 sheets of drywall, you will need approximately 792 screws ($22 \times 36$). Screws are typically sold by weight; a 5-pound box of 1-1/4 inch screws contains about 800 to 900 screws, making it the right size for a standard room project.

Specialized Panels: Fire Rated Drywall Type X Code Requirements Residential & Greenboard

Standard drywall is suitable for dry living areas, but kitchens, bathrooms, and garages have different safety and moisture requirements. Using specialized panels in these zones is often necessary to meet local building codes and protect your home.

Complying with Fire Rated Drywall Type X Code Requirements Residential Safety Rules

Building codes across the United States enforce specific fire rated drywall type x code requirements residential rules to slow the spread of fire between rooms. Type X drywall contains glass fibers and special additives in its gypsum core that help it resist fire. A 5/8-inch Type X panel must have a certified fire-resistance rating of at least one hour, compared to only 30 minutes for standard 1/2-inch drywall.

The International Residential Code (IRC) requires Type X drywall in several key areas:

Estimating Greenboard Mold Resistant Drywall for Bathrooms Cost and Benefits

Bathrooms, kitchens, and laundry rooms are exposed to high moisture levels, which can cause standard drywall paper to mold and decay. To prevent this, builders use moisture-resistant drywall, commonly known as greenboard due to its green paper face, or newer mold-resistant options with fiberglass faces.

When calculating your budget, keep in mind that the greenboard mold resistant drywall for bathrooms cost is generally 20% to 30% higher than standard 1/2-inch drywall. In 2026, a standard 1/2-inch 4x8 sheet of greenboard costs about $18 to $22, compared to $15 for standard board. While greenboard is excellent for bathroom walls and ceilings, it should not be used as a substrate in areas with direct water contact, such as tub surrounds or tiled shower walls. In those zones, building codes require cement backer board (such as Durock or HardieBacker) or fiberglass-faced tile backer boards (such as DensShield) to prevent moisture from damaging the framing.

⚠️ Code Warning: Never use greenboard or standard moisture-resistant drywall on ceilings if the framing joists are spaced 24 inches on center and you plan to apply a heavy water-based texture. The moisture-resistant additives make the board more flexible, which can lead to sagging under the weight of the mud. Use 5/8-inch Type X or specialized sag-resistant ceiling drywall instead.

Layout Planning: How to Hang Drywall Ceiling First or Walls and Taping Methods

Proper planning and installation steps are essential for a flat, durable wall. Understanding the correct order of installation and how to finish the joints will save you time and lead to a better final look.

Professional Standards: How to Hang Drywall Ceiling First or Walls

When starting a room installation, always follow the rule of how to hang drywall ceiling first or walls. Hanging the ceiling first is the industry standard for two main reasons:

First, hanging the ceiling panels first allows the wall panels to butt up tightly against the ceiling sheets. This provides support along the perimeter edges of the ceiling panels, helping to hold them up over time. Second, it is much easier to cut and fit a wall panel tightly against a ceiling than it is to fit a ceiling panel against pre-installed wall sheets. When hanging ceiling panels, run them perpendicular to the ceiling joists to maximize strength, and stagger the end joints to distribute structural stress and prevent cracks.

How to Finish Drywall Joints Mudding Taping Guide for Seamless Walls

Once all panels are hung, the joints and fastener heads must be sealed and smoothed. Following a structured how to finish drywall joints mudding taping guide is the key to achieving professional results. Drywall finishing is rated from Level 0 to Level 5:

To finish joints, apply a layer of joint compound to the seam, press paper tape firmly into the mud, and use a joint knife to scrape away excess mud. Let it dry completely before applying the fill coat with an 8-inch or 10-inch knife. Finally, apply the finish coat with a 12-inch knife, feathering the edges outward to create a flat transition. Sand lightly between coats using 150-grit or 220-grit sandpaper, making sure not to sand through the paper face of the drywall.

Budgeting and Labor: Cost to Dry Wall a 12x12 Room DIY vs Pro Comparison

A 12x12 room is a common home remodeling project. Let's look at a detailed breakdown of the cost to dry wall a 12x12 room diy vs pro to help you decide whether to do the work yourself or hire a professional contractor.

Analyzing the Cost to Dry Wall a 12x12 Room DIY vs Pro Details

For a standard 12x12 room with 9-foot ceilings, one door, and two windows, the net surface area is approximately 531 square feet (584 square feet including a 10% wastage allowance). This requires 19 sheets of 1/2-inch drywall. The tables below compare DIY and professional costs for this project:

DIY Cost Breakdown (Materials Only)

Material / Tool Quantity Unit Cost Total Cost
Standard 1/2" 4x8 Drywall 19 sheets $15.00 $285.00
Pre-mixed Joint Compound 3 buckets (5-gal) $22.00 $66.00
Drywall Screws (1-1/4" Coarse) 1 box (5 lbs) $22.00 $22.00
Paper Joint Tape 1 roll (250 ft) $8.00 $8.00
Metal Corner Bead (8 ft) 4 pieces $6.00 $24.00
Sanding Sponges & Supplies Assorted $20.00 $20.00
Basic Taping Knives & Mud Pan 1 set $30.00 $30.00
Total DIY Cost β€” β€” $455.00

Professional Contractor Cost Breakdown (Labor + Materials)

In 2026, the national average cost to hang and finish drywall per square foot 2026 ranges from $1.50 to $3.50. For our 12x12 room with 531 square feet of surface area, here is what you can expect to pay for a professional installation:

Choosing the DIY route can save you between $340 and $1,400. However, drywall finishing is a skill that takes practice. A poor finish will show under lighting, so many homeowners choose a hybrid approach: they hang the sheets themselves and hire a professional taper to apply the joint compound and sand the walls.

Setting up a Sheetrock Cost Estimator Home Improvement Budget

When planning your sheetrock cost estimator home improvement budget, it is important to account for indirect expenses. These include tool rentals (like a drywall lift for $40 a day), dust control supplies (such as plastic sheeting, painters tape, and HEPA filters), and waste disposal fees. Additionally, remember to account for potential repairs to framing or electrical boxes, which should be done before hanging the new drywall.

If you are planning a large renovation, track your material expenses carefully. According to the IRS, home improvements that add value to your property can be added to your home's tax basis, which can reduce your capital gains tax when you sell the property. Keep all receipts from Home Depot, Lowe's, or local building suppliers to document these improvements. You can also research home values on platforms like Zillow to see how updating your interior walls and finishes compares to other homes in your neighborhood.

Finishing Accessories: Drywall Corner Bead Linear Feet Calculation & Wastage

Corners require special attention during installation. Outside corners need protection from daily wear, and angled cuts require careful planning to prevent running out of material.

Performing a Drywall Corner Bead Linear Feet Calculation for Protected Edges

An outside corner needs a protective bead to create a straight, impact-resistant edge. To determine how much material to buy, you must perform a drywall corner bead linear feet calculation. Corner beads are typically sold in 8-foot, 9-foot, and 10-foot lengths, made of galvanized steel, vinyl, or paper-faced plastic.

To calculate the corner bead needed for your project:

  1. Count the number of outside vertical corners in the room. A standard rectangular room has zero outside vertical corners. However, rooms with closets, entryways, or structural columns will have several.
  2. Measure the height of each corner. For a room with 9-foot ceilings, each corner requires a 9-foot corner bead.
  3. Multiply the number of corners by the height. For example, if a room has four outside corners and 9-foot ceilings, you need 36 linear feet of corner bead ($4 \times 9$). You would purchase four 10-foot corner beads and trim them to fit.

Determining the Drywall Wastage Factor Allowance Estimation for Angled Cuts

Applying a proper drywall wastage factor allowance estimation is important because framing is rarely perfectly plumb, and sheets must be cut to fit around doors, windows, and angled walls. Standard wastage guidelines include:

Using our drywall calculator above will help you include this waste factor automatically, helping you avoid mid-project supply runs.

Regional Pricing Comparison: Cost to Hang and Finish Drywall per Square Foot 2026

The cost to hang and finish drywall per square foot 2026 varies across the United States. Labor rates, regional shipping costs for gypsum, and local building codes all influence the final price. The table below shows estimated professional installation costs across different states in 2026:

State / Region Avg. Material Cost / Sq Ft Avg. Labor Cost / Sq Ft Total Installed Cost / Sq Ft Estimated Cost for a 12x12 Room (531 sq ft)
Texas (Houston, Dallas, Austin) $0.45 $1.25 $1.70 $902.70
California (Los Angeles, San Francisco) $0.55 $2.75 $3.30 $1,752.30
New York (NYC Metro, Albany) $0.58 $2.90 $3.48 $1,847.88
Florida (Miami, Tampa, Orlando) $0.48 $1.45 $1.93 $1,024.83
Illinois (Chicago, Peoria) $0.52 $2.10 $2.62 $1,391.22
Ohio (Columbus, Cleveland, Cincinnati) $0.44 $1.55 $1.99 $1,056.69
Georgia (Atlanta, Savannah) $0.46 $1.35 $1.81 $961.11
Colorado (Denver, Colorado Springs) $0.50 $1.95 $2.45 $1,300.95
Washington (Seattle, Spokane) $0.54 $2.40 $2.94 $1,561.14
North Carolina (Charlotte, Raleigh) $0.45 $1.40 $1.85 $982.35

These averages are for standard residential projects. Labor costs can be higher in metropolitan areas with strict licensing requirements or labor shortages, while rural areas may have lower labor rates but higher shipping costs for materials.

Critical Tips for Estimating Drywall Wastage Factor Allowance Estimation

To keep your project on budget and minimize waste, keep these professional tips in mind:

  1. 1 Maintain Proper Temperature: Keep your workspace between 55Β°F and 85Β°F. Extreme cold or humidity can prevent joint compound from drying properly and lead to cracks.
  2. 2 Inspect Your Framing: Use a straightedge to check your studs before hanging drywall. Planing down high studs or shimming low ones will prevent waves in your finished walls.
  3. 3 Use Construction Adhesive: Applying drywall adhesive to the studs before screwing down the panels can reduce the number of screws you need by up to 50% and helps prevent future screw pops.
  4. 4 Stagger Your Joints: Avoid aligning vertical seams on adjacent rows. Staggering joints helps distribute structural stress and reduces the risk of hairline cracks.
  5. 5 Set Screws Carefully: Drive screws so the head sits slightly below the paper face, forming a dimple without tearing the paper. A torn paper face loses its holding power.
  6. 6 Thin Pre-mixed Mud: Pre-mixed joint compound can be thick straight out of the bucket. Add a cup or two of clean water and mix well to reach a smooth, easy-to-apply consistency.
  7. 7 Avoid Sanding Too Hard: Sanding is dusty and can damage the drywall paper. Feather your mud coats carefully using wide knives to minimize the amount of sanding needed.
  8. 8 Always Prime Before Painting: Bare drywall and joint compound absorb paint differently. Apply a high-quality primer-sealer first to prevent uneven patches in your final paint coats.

Common Mistakes: How to Finish Drywall Joints Mudding Taping Guide Pitfalls

Avoid these common installation errors to ensure a clean, long-lasting finish:

Free Tools and the Sheetrock Cost Estimator Home Improvement Budget Suite

At US Property Tools, we provide free calculators to help you plan your construction and renovation projects. Explore our other tools to help manage your home improvement budget:

Conclusion and Next Steps: Use Our Drywall Calculator Sheetrock Joint Compound Tape Screws Builder

Drywall is a key element of any renovation, providing fire safety, sound insulation, and a smooth finish for your home. By choosing the right materials, understanding installation guidelines, and estimating your supplies carefully, you can keep your project on track and on budget. Use our free drywall calculator above to enter your room dimensions, select your options, and get an instant, detailed material estimate for your next project.