Aquarium Volume Calculator

Your details

For cylinders enter the outer diameter. For hexagonal tanks enter the side length.
in
Inside measurement from front glass to back glass.
in
Inside measurement from bottom to waterline.
in
Depth of gravel or sand. Reduces usable water volume.
in
Estimated percentage of gross volume displaced by rocks, driftwood, filters, heater, and equipment. Typical range is 5-15%.
%
Space left at the top for safety and splashing. Typically 1-2 in (2-5 cm).
in
Degrees Fahrenheit above room temperature you need the tank to reach. A 10 F rise is typical (e.g. from 68 F room to 78 F tank).
F
Usable water volume
46.2gal

Volume after substrate, hardscape offset, and fill gap are removed

Gross volume56.7gal
Gross volume (liters)214.7L
Usable water volume (liters)174.9L
Filled water weight385lb
Estimated total tank weight669lb
Recommended heater250W
Recommended filter flow190GPH
Fish stocking estimate46in
Gross volume (gal)56.7
Usable water (gal)46.2
Water weight (lb)385

A 57-gallon tank holds about 46.2 gallons of actual water.

  • Your usable water volume is 46.2 gal (175 L), about 19% less than the gross tank capacity.
  • A 250 W heater is a good starting point for a 10 F temperature rise. Use a reliable thermometer to fine-tune.
  • A filter rated at 190 GPH gives you the turnover rate suited to your stocking type. Increase it if water clarity is poor.

Next stepRun the nitrogen cycle for 4-6 weeks before adding fish. Use the usable volume figure (not the gross capacity) when dosing any water treatments or medications.

 = Powered by OnlyCalculators