- Construction Calculator
- Automotive Calculator
- Networking Calculator
- Technology Calculator
- Cloud Services Calculator
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Slope / Grade CalculatorCalculate slope as a percent grade, angle of incline, slope length and ratio from rise and run. Free, instant grade calculator for any units.
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Concrete Slab CalculatorCalculate concrete slab area and volume. Enter length, width, and thickness to get square feet, cubic feet, cubic yards, and bag estimates.
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Roof Area CalculatorCalculate the true surface area of a pitched roof from building footprint and pitch (rise/run). Get square feet and roofing squares instantly.
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Construction Loan CalculatorEstimate interest paid during construction on a draw-based loan. Enter loan amount, rate, and term to see total interest-only cost over the build.
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CFM Airflow CalculatorCalculate the CFM airflow needed to ventilate a room from its dimensions and air changes per hour (ACH). Free room ventilation sizing tool.
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Duct Velocity CalculatorCalculate air velocity (fpm) in round or rectangular HVAC ducts from CFM and duct size. Free duct velocity calculator with area and m/s output.
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HVAC Tonnage CalculatorEstimate the AC tonnage you need from room size and climate. Enter square feet and BTU factor to get tons and total cooling load (BTU/hr).
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Rebar Weight CalculatorCalculate steel rebar weight from bar diameter, length and quantity using the d²/162 formula. Get unit weight (kg/m), weight per bar, total kg and tonnes.
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Flooring CalculatorCalculate how many boxes of flooring you need and the total cost. Enter room size, waste allowance, coverage per box, and price per box.
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Gravel & Aggregate CalculatorEstimate how many tons and cubic yards of gravel, sand, or crushed stone you need. Enter length, width, depth, and material density.
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Asphalt Tonnage CalculatorCalculate how many tons of asphalt you need for a paving job. Enter length, width and thickness to get tonnage based on hot-mix density (145 lb/ft³).
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Paint Coverage CalculatorEstimate how many gallons of paint you need. Enter wall length, height, openings, coats, and coverage per gallon to get gallons rounded up.
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Drywall Sheet CalculatorCalculate how many drywall sheets you need for your walls and ceilings. Enter total area, sheet size, and waste allowance for an instant estimate.
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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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Paint Calculator — Gallons Needed for a RoomEstimate how many gallons of paint you need for a room. Enter dimensions, doors, windows, coats and coverage to get a fast, accurate paint estimate.
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Meters to Feet and Inches CalculatorConvert meters to decimal feet and to feet plus inches, with inches rounded to the nearest 1/2, 1/4, 1/8, 1/16, 1/32 or 1/64 in lowest terms.
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Paint Coverage and Cost CalculatorEstimate paint needed for a wall, room, ceiling, or trim in gallons or liters, subtract doors and windows, and calculate total paint cost.
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Feet and Inches Arithmetic CalculatorAdd, subtract, multiply, divide, scale, or convert lengths in feet and inches. Accepts fractions and mixed numbers; shows tape-measure fractions and decimals.
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Tank Volume & Fill CalculatorCalculate total tank capacity and partial fill volume for cylinder, rectangle, oval and capsule tanks. Results in US/Imperial gallons, liters, cubic meters and feet.
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Topsoil CalculatorFree topsoil calculator: find how much soil you need by volume (cubic yards, feet, meters, liters), weight in tons, number of bags and estimated cost.
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Road Base Fill Volume, Weight and Cost CalculatorEstimate road base / sub-base fill volume in cubic meters, yards and feet, plus material weight and cost, from length, width and depth with compaction and waste allowances.
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Mulch Planning CalculatorPlan your mulch project: enter bed area and depth to get cubic feet, cubic yards, bags needed, bulk yards, estimated weight and total cost. US customary units.
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Cubic Yards CalculatorCalculate cubic yards, cubic feet and cubic meters of mulch, gravel, sand or concrete for any area and depth, with optional total material cost.
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Cubic Feet Calculator (Volume & Cost for Multiple 3D Shapes)Calculate volume in cubic feet for boxes, rooms, tanks, cylinders, spheres and more. Convert to cubic inches, yards, meters, gallons, liters and total cost.
