Volume Calculator
Find the volume of a cube, rectangular prism, cylinder, sphere, cone, pyramid or capsule in litres and cubic metres first. Enter dimensions in mm, cm or m and get the result instantly converted to cubic feet and gallons too.
0.7854 m³
0.7854 m³ · 785,398.2 cm³ · 785.4 L · 27.736 ft³ · 1.0273 yd³
207.48 US gal · 172.76 imperial gal (UK/CA/AU).
Standard geometric formulas (V=s³, l·w·h, πr²h, (4/3)πr³, (1/3)πr²h, (1/3)lwh); capsule = cylinder + full sphere. Unit conversions per SI/imperial definitions. How we calculate →
Finding volume in litres and cubic metres
Australia uses the metric system throughout, so volume is measured in cubic metres (m³) or litres (L). A cylindrical rainwater tank with a 0.6 m radius and 1.5 m height holds π × 0.6² × 1.5 ≈ 1.6965 m³, or about 1,696.5 litres. Enter dimensions above in mm, cm or m and the calculator returns the volume in every common unit at once.
The formula for each 3D shape
Cube: V = side³. Rectangular prism (a raised garden bed or storage tub): V = length × width × height. Cylinder (a rainwater tank or post hole): V = π r² × height. Sphere: V = (4/3)π r³. Cone: V = (1/3)π r² × height. Pyramid with a rectangular base: V = (1/3) × length × width × height. A capsule adds a full sphere's volume to a cylinder's for its two rounded ends.
Litres vs. cubic metres: which to use
Smaller volumes — a water tank, an eskys or a fish pond — are usually quoted in litres, while larger volumes like a swimming pool, a load of soil or a shipping container are quoted in cubic metres. This calculator computes both simultaneously, plus cubic feet and gallons for imported gear specified in imperial units: 1 US gallon ≈ 3.785 litres, 1 imperial gallon ≈ 4.546 litres.
Common Australian uses
Sizing a rainwater tank in litres for household use, checking how many cubic metres a raised veggie bed or a load of garden soil needs, working out a pool's approximate capacity, or converting an imported appliance's cubic-foot spec into litres for comparison — switch shape and unit above instead of using a separate calculator for each job.
Frequently asked questions
How do I calculate a rainwater tank's capacity in litres?
Volume = π × radius² × height, in metres, then × 1,000 for litres. A tank with a 0.75 m radius and 1.8 m height holds π × 0.75² × 1.8 ≈ 3.1809 m³, about 3,180.9 litres. Enter your own radius and height above for the exact figure in litres and m³.
How many litres are in a cubic metre?
Exactly 1,000 litres. A 1 m × 1 m × 1 m box holds 1,000 litres — the calculator shows litres alongside m³ automatically so you don't need a separate conversion.
How many cubic metres of soil does a raised garden bed need?
Multiply length × width × height (soil depth) in metres. A bed 1.8 m × 0.9 m × 0.3 m deep needs 1.8 × 0.9 × 0.3 = 0.486 m³ of soil, or 486 litres. Enter your own dimensions above in cm or m for an exact figure.
How do I work out a swimming pool's approximate volume?
Treat a rectangular pool as a rectangular prism (length × width × average depth) or a round pool as a cylinder (π × radius² × depth). A round pool with a 2 m radius and 1.2 m average depth holds about 15.08 m³, or roughly 15,080 litres — enter your own measurements above.
How do I convert cubic feet to litres for an imported appliance?
Multiply cubic feet by about 28.32 to get litres (1 ft³ ≈ 28.3168 L). A 10 ft³ chest freezer therefore holds roughly 283.2 litres. Enter the dimensions in feet above and the calculator converts automatically.
Researched & verified by the Calcuris Data & Research Team. How we build and check our tools →