Calculate the volume, capacity, or size of any shape instantly. Enter dimensions in metres or feet, and get results in cubic metres, cubic feet, litres, US gallons, and UK gallons.
If you enter density, the calculator also provides mass:
Formula: Mass=Density×Volume\text{Mass} = \text{Density} \times \text{Volume}
Supported density units: kg/m³, g/cm³, lb/ft³.
Results shown in kg and lb.
✅ Save time vs manual math
✅ Convert between metric and imperial units
✅ Perfect for pools, aquariums, tanks, construction, logistics, and science projects
✅ Automatic litre and gallon conversions
✅ Optional density-to-mass feature
Q1. What is the formula for the volume of a cube?
The formula is V = a3, where a is the side length.
Q2. What is the cylinder volume formula?
The formula is V = π r2 h, where r is the radius and h is the height.
Q3. What is the formula for the volume of a sphere?
The formula is V = 4⁄3 π r3.
Q4. How do you calculate pool volume?
For rectangular pools: V = L × W × D (average depth).
For circular pools: V = π r2 D.
Q5. How do you calculate aquarium volume?
Rectangular tank: V = L × W × H.
Cylindrical tank: V = π r2 h.
Q6. How do I convert cubic meters to litres or gallons?
Q7. What is density calculation formula?
Density = Mass ÷ Volume. Rearranged: Mass = Density × Volume.