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Tank volume calculator

Capacity of a rectangular tank, aquarium or container in gallons and liters, and the weight of the water.

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US gallons 56.7 gal

How it works

V = L × W × H

A rectangular tank holds length × width × height. The inside measurements give the true capacity; outside ones overstate it by the wall thickness. Water weighs about 1 kg per liter (8.34 lb per US gallon), which matters for shelves and floors: a 55-gallon aquarium of water alone is about 460 lb.

  1. Length × width × height × fill (in meters) 1.2192 × 0.3302 × 0.5334 × 100 ÷ 100 = 0.2147 m³
  2. In US gallons (1,000 L per m³) 0.2147 × 1000 ÷ 3.785411784 = 56.7 gal
  3. Weight of the water (about 998 kg per m³ at room temperature) 0.2147 × 998.2 = 214.3 kg

Printed from rocketcalc.io/geometry/tank-volume