Aquarium Volume Converter
Calculate aquarium volume in gallons and liters from tank dimensions.
Enter length, width, and height for instant volume calculation.
Enter tank dimensions — see volume and water weight instantly.
Tank Volume
Aquarium volume from dimensions.
Formula:
- Volume (gallons) = Length x Width x Height / 231 (all measurements in inches; 231 cubic inches = 1 US gallon)
- Volume (liters) = Length x Width x Height / 1000 (all measurements in centimeters)
Common standard tank sizes:
| Size (gal) | L x W x H (inches) | Liters |
|---|---|---|
| 5 | 16 x 8 x 10 | 19 |
| 10 | 20 x 10 x 12 | 38 |
| 20 | 24 x 12 x 16 | 76 |
| 29 | 30 x 12 x 18 | 110 |
| 40 | 36 x 18 x 16 | 151 |
| 55 | 48 x 13 x 20 | 208 |
| 75 | 48 x 18 x 20 | 284 |
| 125 | 72 x 18 x 22 | 473 |
Weight of water:
- 1 US gallon of water = 8.34 lbs (3.78 kg)
- A full 55-gallon tank weighs about 460 lbs (209 kg) with water.