Aquarium volume calculator
Estimate fish tank litres and UK or US gallons using internal measurements, water level and displaced volume.
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How to use this tool
- Measure inside the glass and choose a tank shape. For a cylinder, enter its inside diameter.
- Enter the water-level gap and your estimate of displaced litres. Run the tool to see capacity and the chosen water-change amount.
Things to know
- Dimensions are limited to 1,000 cm. Actual water volume depends on your measurements and displacement estimate.
- Does not recommend stocking levels, chemical doses or glass thickness. Bow-front and irregular tanks are outside this model.
- Processing stays on your device. Results are not saved between visits.
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