Geometry

  • Concrete Slab Calculator
    Calculate concrete needed for a slab in cubic yards and cubic feet, plus how many 40, 50, 60 or 80 lb bags to buy. Free estimator.
  • Square Footage Calculator
    Calculate square footage instantly. Enter length and width in feet to get total area in square feet, square yards, and square meters.
  • Liters to Gallons Converter
    Convert liters to gallons instantly. Get both US liquid gallons and UK imperial gallons from any volume in liters, with the exact formula shown.
  • Paint Volume & Coverage Calculator
    Calculate how many gallons of paint you need based on wall area, number of coats, and coverage per gallon. Free, fast paint estimator.
  • Engine Displacement Volume Calculator
    Calculate total engine displacement from bore, stroke and cylinder count. Get results in cc, liters and cubic inches instantly with this free tool.
  • Weight to Volume Calculator
    Convert weight (mass) to volume using density. Enter grams, kg, lb or oz plus density to get volume in mL, liters and cm³ instantly.
  • Round Pool Volume Calculator
    Calculate the water volume of a round (circular) swimming pool in US gallons and cubic feet from its diameter and average depth.
  • Raised Garden Bed Soil Calculator
    Calculate how much soil you need for a raised garden bed in cubic feet, cubic yards, and number of bags. Enter length, width, and depth.
  • Fill Dirt Calculator
    Calculate how much fill dirt you need in cubic yards and tons. Enter length, width and depth to estimate volume, weight and cost for your project.
  • Rectangular Pool Gallons Calculator
    Calculate how many gallons of water your rectangular swimming pool holds using length, width, and average depth. Free, instant pool volume calculator.
  • Water Tank Capacity Calculator
    Calculate water tank capacity in liters for rectangular or cylindrical tanks. Enter dimensions in meters to get volume, liters and US gallons instantly.
  • Shipping Box Volumetric Weight Calculator
    Calculate the volumetric (dimensional) weight and volume of a shipping box from its length, width, height and the carrier dimensional divisor (5000, 6000 or 4000).
  • Box Volume Calculator
    Calculate the volume of a rectangular box from length, width and height. Get results in cubic inches, cubic feet, liters and US gallons instantly.
  • Bucket Volume Calculator
    Calculate the volume of a tapered bucket from its top diameter, bottom diameter and height. Get results in liters, US gallons and UK gallons instantly.
  • Hot Tub Volume Calculator
    Calculate how many gallons of water your hot tub holds. Enter the shape and dimensions to estimate volume in gallons, liters and cubic feet.
  • Horizontal Cylindrical Tank Volume Calculator
    Calculate the liquid volume in a horizontal cylindrical tank for any fill height. Get partial-fill volume, fill %, liters and US gallons instantly.
  • Oval (Stadium) Tank Volume Calculator
    Calculate the volume of an oval (stadium / capsule cross-section) tank from its width, height and length. Get liters, cm³ and US gallons instantly.
  • Pythagorean Theorem Calculator
    Solve a right triangle with the Pythagorean theorem. Find the hypotenuse c or a missing leg a or b, plus area and perimeter, instantly.
  • Circle Perimeter from Diameter Calculator
    Calculate the perimeter (circumference) of a circle from its diameter using C = πd. Instantly get circumference, radius, and area for any diameter.
  • Semicircle Perimeter Calculator
    Calculate the perimeter of a semicircle from its radius using P = πr + 2r = r(π + 2). Free, instant, and shows the arc and diameter parts.
  • Drywall Sheet Calculator
    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.
  • Equilateral Triangle Perimeter Calculator
    Calculate the perimeter of an equilateral triangle instantly using P = 3a. Enter the side length to get the total perimeter in one click.
  • Mulch Coverage Calculator
    Calculate how many square feet a bag of mulch covers and how many bags you need based on area, depth, and bag size. Free landscaping tool.
  • Room Area Calculator (Square Feet & Square Meters)
    Calculate room area from length and width in feet or meters. Instantly convert between square feet and square meters for any room.

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