Planning tool
Aquarium Volume Calculator
Calculate aquarium gallons, liters, water weight, and substrate volume.
Runs in your browserResult
- Usable water
- 50.49 US gal
- Liters
- 191.1 L
- Water weight
- 421 lb
- Substrate volume
- 0.75 cu ft
Use inside dimensions. Glass, equipment, hardscape, and an unfilled rim reduce actual water volume.
How to use this aquarium volume calculator
- Enter the inside length, width, and water depth, then choose the shape and displacement assumptions.
- Review the calculated totals, units, and assumptions. Check the inputs and units before relying on the result.
- Change one input at a time to compare another case, then copy or save the result you plan to use.
About this aquarium volume calculator
Use the Aquarium Volume Calculator to calculate aquarium gallons, liters, water weight, and substrate volume. Each control affects a specific part of the result.
You can also use it to compare results after changing one input.
Example
Use inside dimensions and the actual water height, then subtract displacement from rock and substrate to estimate usable gallons.
Common uses
- → calculate aquarium gallons, liters, water weight, and substrate volume
- → compare results after changing one input
- → save an estimate for planning or comparison