- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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Cubic Feet to Cubic Meters CalculatorConvert cubic feet (ft³) to cubic meters (m³) instantly. Enter any volume and get an accurate m³ result using the factor 1 m³ = 35.3147 ft³.
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Quarts to Gallons ConverterConvert quarts to gallons instantly. Enter any quart value to get US gallons using the simple formula gallons = quarts ÷ 4.
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Trench Volume CalculatorCalculate trench excavation volume in cubic yards, cubic feet and cubic meters from length, width and depth. Free, fast and accurate.
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Oil Tank Volume CalculatorCalculate how many gallons of heating oil are in a horizontal cylindrical tank from the diameter, length, and stick/dip fill depth.
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Aquarium Volume CalculatorCalculate your fish tank volume in US gallons and liters from length, width, and height in inches. Free, instant aquarium capacity calculator.
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Right Triangle Perimeter from Two Legs CalculatorFind the perimeter of a right triangle from its two legs. Enter leg a and leg b to get the hypotenuse and total perimeter instantly.
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Pentagon Perimeter CalculatorCalculate the perimeter of a regular pentagon instantly using P = 5s. Enter one side length and get the total perimeter in any unit.
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Rhombus Perimeter CalculatorCalculate the perimeter of a rhombus instantly with P = 4a. Enter the side length and get the total perimeter in any unit. Free and accurate.
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Milliliters to Fluid Ounces ConverterConvert milliliters (mL) to US fluid ounces (fl oz) instantly. Enter a volume and get an accurate mL to oz conversion using the 29.5735 factor.
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Keg Volume CalculatorFind how many beers are in a keg. Enter keg size and serving ounces to get servings, gallons, fluid ounces, and liters instantly.
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Fluid Ounces to Milliliters ConverterConvert fluid ounces (fl oz) to milliliters (mL) instantly. Uses 1 US fl oz = 29.5735 mL. Fast, accurate oz to mL conversion for recipes and labels.
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Barrel Volume CalculatorCalculate the volume of a barrel, cask, or drum using the Kepler approximation. Enter height and the middle & end diameters to get liters and gallons.
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Heron's Formula CalculatorFind the area of any triangle from its three side lengths using Heron's formula. Free calculator showing area, semi-perimeter and perimeter instantly.
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30-60-90 Triangle Sides from Short LegFind all sides of a 30-60-90 triangle from the short leg. Computes long leg (short·√3), hypotenuse (2·short), perimeter, and area instantly.
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45-45-90 Triangle Hypotenuse CalculatorFind the hypotenuse of a 45-45-90 right triangle from a leg length using h = leg × √2. Also gives perimeter and area instantly.
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Laminate/Flooring Boxes for a Rectangular Room CalculatorCalculate how many boxes of laminate or flooring you need for a rectangular room, including a waste allowance for cuts and mistakes.
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Triangle Third Angle CalculatorFind the third angle of any triangle instantly. Enter two known angles and get the missing angle using C = 180° − A − B. Free and accurate.
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Rectangular Aquarium Volume in Gallons CalculatorCalculate the volume of a rectangular aquarium in US gallons from its length, width, and height in inches. Also shows cubic inches and liters.
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Mulch Bags for a Rectangular Bed CalculatorCalculate 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.
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BTU for a Rectangular Room CalculatorCalculate 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.
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Distance Between Two Points CalculatorFind the distance between two points (x1,y1) and (x2,y2) on a coordinate plane — the length of a triangle side — using the distance formula.
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Wheel Revolutions to Distance CalculatorConvert wheel revolutions into distance travelled. Enter wheel diameter and number of turns to get distance in meters, km, miles, and feet.
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Bolt Circle Diameter CalculatorCalculate the center-to-center chord spacing between bolt holes from the bolt circle diameter (BCD) and hole count, or back-solve the BCD.
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Circular Motion Speed CalculatorConvert RPM and radius into linear (tangential) speed and angular velocity. Uses v = 2πr·(RPM/60) = ωr for any rotating object.
