Calculate aquarium tank volume, fish inches, or estimated max fish count from tank dimensions, adult fish size, and stocking rate.

Aquarium Stock Calculator

Basic Stock
Fish Count

Enter any 3 values to calculate the missing variable

Fish Stock Formula

The following formula is used to calculate how much fish to stock an aquarium with.

"F = L*W*H*.004329*2
  • Where "F is the inches of fish
  • L is the length of livable water (in)
  • W is the width of livable water (in)
  • H is the height of livable water (in)

Aquarium Stock Definition

What is aquarium stock? An aquarium stock is an amount of fish that someone should place in any given aquarium to allow for proper living space for fish. In general, this is usually provided as 2 inches of fish per gallon of water. This assumes proper filtration and care of the fish and aquarium.

Example

aquarium stock calculator
fish stock formula