• Swimming Pool Surface Area Calculator
    Calculate the water surface area of a rectangular swimming pool from its length and width. Get results in square feet and square meters instantly.
  • Rectangle Gravel/Mulch Volume Calculator
    Calculate how many cubic yards of gravel, mulch, sand or topsoil you need to fill a rectangular area at a given depth. Enter length, width and depth.
  • Rectangular Concrete Slab Volume Calculator
    Calculate how many cubic yards of concrete you need for a rectangular slab from its length, width, and thickness. Fast, accurate, and free.
  • Paint Needed for a Rectangular Wall Calculator
    Calculate how many gallons of paint you need for a rectangular wall from its length, height, coverage per gallon, and number of coats.
  • Rectangular Lumber Board Feet Calculator
    Calculate board feet of rectangular lumber from length, width and thickness in inches. Multiply by board count for total BF instantly.
  • Concrete Slab Cost Calculator
    Estimate the cost to pour a concrete slab from length, width and thickness. Adds material, labor and finishing for a fast total project price.
  • Asphalt Driveway Cost Calculator
    Estimate the cost to pave an asphalt driveway from length, width, thickness, density, price per ton, and labor. Get tons of asphalt and total cost instantly.
  • Rectangular Room Square Footage Calculator
    Calculate the square footage of a rectangular room instantly. Enter length and width in feet to get area in sq ft, sq yards, and sq meters.
  • Rectangular Carpet Cost Calculator
    Estimate the cost of carpeting a rectangular room. Enter length, width and price per square metre to get total floor area and carpet cost instantly.
  • Rectangular Wall Area Calculator
    Calculate the area of a rectangular wall from its length and height, then subtract doors and windows to get the net paintable or tileable area in m².
  • Tile Area Calculator
    Calculate how many tiles you need for a floor or wall. Enter room and tile dimensions plus a wastage allowance to get the exact tile count.
  • Carpet Area Calculator
    Calculate how many square yards of carpet you need from room length and width in feet, with an optional waste allowance for cuts and seams.
  • Roof Pitch Angle Calculator
    Convert roof rise and run into pitch angle in degrees, slope percent, rise:12 pitch, and rafter multiplier. Free, instant roof slope calculator.
  • Cubic Feet to Cubic Yards Calculator
    Convert cubic feet (ft³) to cubic yards (yd³) instantly. Just divide by 27. Free, accurate volume converter for concrete, mulch, gravel and soil.
  • Trench Volume Calculator
    Calculate trench excavation volume in cubic yards, cubic feet and cubic meters from length, width and depth. Free, fast and accurate.
  • Laminate/Flooring Boxes for a Rectangular Room Calculator
    Calculate how many boxes of laminate or flooring you need for a rectangular room, including a waste allowance for cuts and mistakes.
  • Mulch Bags for a Rectangular Bed Calculator
    Calculate how many bags of mulch you need to cover a rectangular garden bed. Enter length, width, depth, and bag size to get the exact bag count.
  • BTU for a Rectangular Room Calculator
    Calculate the air conditioner BTU needed to cool a rectangular room. Enter length and width in feet to size your AC unit with the 20 BTU/sq ft rule.
  • Bolt Circle Diameter Calculator
    Calculate the center-to-center chord spacing between bolt holes from the bolt circle diameter (BCD) and hole count, or back-solve the BCD.
  • Concrete Driveway Volume Calculator
    Calculate concrete volume in cubic yards and feet for a driveway or slab from length, width and thickness, plus 80 lb and 60 lb bag counts.
  • Square Feet per Gallon Paint Calculator
    Find out how many gallons of paint you need. Enter wall area, coverage per gallon, and coats to get the exact amount of paint to buy.
  • Wall Tile Calculator
    Calculate how many wall tiles you need for a backsplash or feature wall. Enter wall size, tile size, and waste % to get the exact tile count.
  • Excavation Volume Calculator
    Calculate excavation volume in cubic yards, cubic feet, and cubic meters from length, width, and depth. Free dig volume estimator for trenches and foundations.
  • Gravel Tons Calculator
    Estimate how many tons of gravel you need from area and depth. Converts cubic yards to US tons using gravel density. Free, fast project calculator.