Plan any build more confidently using the Lumber Calculator, BTU Calculator, Deck Stair Calculator, Metal Roof Cost Calculator, and Lumber Shrinkage Calculator — plus the Pipe Volume Calculator for plumbing runs and the Chain Link Fence Cost Calculator for perimeter budgeting. Whether you're framing a deck or sizing an HVAC system, the math is covered.
Browse the full list, sorted by how other builders actually use it, or open the Trending tab for what's popular this week. Every tool is completely free, requires no account, and works on any phone, tablet, or laptop.
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Slot Machine RTP CalculatorCalculate how many wallpaper rolls you need for a room. Enter wall size, roll dimensions and pattern repeat to get rolls, strips and strips per roll.
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Square Footage of Walls in a Room Calculator (Wall Area + Drywall Sheets)Calculate how many drywall sheets you need for a room. Enter length, width and wall height, pick a sheet size, add waste — get total sheets fast.
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Tank Volume CalculatorCalculate the volume and capacity of horizontal or vertical cylindrical tanks in cubic meters, liters, and US gallons from diameter and length.
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Snow Load CalculatorCalculate roof snow load from snow depth and density, or the ASCE 7 flat-roof snow load using ground snow load and exposure, thermal and importance factors.
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Rational Method Stormwater Runoff CalculatorCalculate peak stormwater runoff with the Rational Method Q=CiA. Enter runoff coefficient, rainfall intensity and drainage area for US (cfs) or SI (m³/s).
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Rug Size CalculatorFree rug size calculator. Enter your room dimensions and desired floor border to get the ideal rug length, width, and area in feet.
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Brick Wall CalculatorCalculate how many bricks you need for a wall. Enter wall dimensions, brick size, mortar joint and waste to estimate total bricks required.
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Shingle Bundle CalculatorEstimate how many shingle bundles you need for your roof. Enter roof dimensions, planes, waste allowance, and bundles per square to get a quick count.
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Mortar Mix CalculatorCalculate the cement and sand needed for a mortar mix. Enter wall area, mortar thickness and mix ratio to get bags of cement, sand volume and dry volume.
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Play Sand CalculatorCalculate how much play sand you need for a sandbox or play area. Enter length, width and depth to get volume, weight in pounds, and number of bags.
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Soil Volume CalculatorCalculate how much soil you need for raised beds and gardens. Get cubic feet, cubic yards, liters, and number of bags from length, width, and depth.
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Mulch Bags CalculatorCalculate how many bags of mulch you need for your garden bed. Enter length, width, depth, and bag size to get exact bag count instantly.
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Mortar Calculator for SlabsEstimate mortar volume, cement and sand needed to lay paving slabs. Enter area, bed thickness and wastage for an instant 1:5 mix material estimate.
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Shower Tile CalculatorEstimate how many tiles you need for your shower walls. Enter wall dimensions, tile size, and waste allowance to get an accurate tile count.
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Log Board Foot CalculatorEstimate board feet of lumber from a log using the Doyle, Scribner, or International 1/4-inch log rules. Enter small-end diameter and length.
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Patio Brick CalculatorCalculate how many bricks or pavers you need for a patio. Enter patio dimensions, brick size, and waste percentage to get an accurate brick count.
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Board Foot Price CalculatorCalculate the total cost of lumber by board foot. Enter thickness, width, length, quantity, and price per board foot to get total board feet and cost.
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Rock Weight CalculatorEstimate the weight of a rock or boulder from its size and rock type. Get results in pounds, US tons, and kilograms for granite, basalt, limestone and more.
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Hip Roof Shingle CalculatorEstimate shingle bundles and roofing squares for a hip roof from building length, width, pitch, and waste factor. Fast, accurate material planning.
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Fence Post Spacing CalculatorCalculate how many fence posts you need, the number of panels, and the exact even spacing between posts for any fence length.
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Tile Calculator (Square Meters)Free tile calculator in square meters. Enter room and tile sizes plus waste % to find total area and the number of tiles you need to buy.
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Post and Rail Fence CalculatorCalculate posts, sections, and rails needed for a post and rail fence. Enter fence length, post spacing, and rails per section for instant materials.
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Deck Stair Stringer CalculatorCalculate deck stair stringers: number of risers, actual riser height, total run, stringer cut length and stair angle from your total rise.
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Sod Cost CalculatorEstimate the cost of sod for your lawn. Enter area dimensions, price per square foot, waste overage, and optional labor to get a total install estimate.
Frequently asked questions
What types of construction projects can I calculate here?
The collection spans residential and light commercial work — roofing, decking, framing, fencing, HVAC sizing, and plumbing. You can estimate material quantities with the Lumber Calculator, plan pipe layouts with the Pipe Volume Calculator, and scope heating needs with the BTU Calculator, all from a single page.
How accurate are the results?
Each calculator uses standard construction formulas cross-checked against industry reference values. Results are reliable estimates for planning and budgeting. For safety- or code-critical work — structural sizing, load-bearing elements, or mechanical systems — always verify against the applicable building code and have a qualified engineer or licensed contractor review your figures.
Do you store or share the measurements I enter?
No. All calculations run directly in your browser. Nothing you type is sent to our servers, saved to a database, or shared with any third party.
Which construction calculators are used most?
The Lumber Calculator, BTU Calculator, and Deck Stair Calculator consistently top the rankings. The Metal Roof Cost Calculator and Pipe Volume Calculator also see heavy use. The full list is sorted by real usage, and the Trending tab shows which tools are gaining traction right now.
Is there any cost or sign-up required?
None at all. Every tool here is completely free — no account, no subscription, no hidden fees. Open any calculator on your phone or desktop and start entering your measurements immediately.
