Aquarium Tank Volume Calculator

Calculate the exact volume of your fish tank in gallons and liters. Select your tank shape and enter its dimensions.

Tank Volume:

0 gallons (0 liters)
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How to Measure Your Aquarium Correctly

Accurate tank volume calculations are essential for proper fish keeping, water changes, and treatment dosing. Follow these steps for precise measurements:

Measurement Tips

  • Always measure the inside dimensions of the tank
  • Use a level surface as your starting point
  • Account for substrate depth in your calculations
  • Consider displacement from decorations

Common Tank Sizes

Standard aquarium sizes in gallons (and their typical dimensions):

  • 10 Gallon: 20" × 10" × 12"
  • 20 Gallon: 24" × 12" × 16"
  • 55 Gallon: 48" × 13" × 21"