**This aquarium water volume calculator helps measure the exact amount of fish tank can hold, ensuring proper habitat conditions for aquatic life. **

A small 20″ x 10″ x 12″ aquarium, which holds about 10.41 gallons.A medium 30″ x 12″ x 18″ aquarium, holding approximately 28.13 gallons.A larger 48″ x 13″ x 21″ aquarium, with a volume of about 57.20 gallons.A big 72″ x 18″ x 24″ aquarium, containing around 134.68 gallons.A very large 96″ x 24″ x 30″ aquarium, holding about 299.29 gallons.

Imagine you have a **rectangular tank** measuring 24 inches long, 12 inches wide, and 18 inches tall. The calculator would use these dimensions to determine that your tank can hold approximately **22.5 gallons** of water.

## Aquarium Water Volume Calculator

Length (inches) | Width (inches) | Height (inches) | Volume (gallons) | Volume (liters) |
---|---|---|---|---|

20 | 10 | 12 | 10.42 | 39.48 |

24 | 12 | 16 | 20.13 | 76.21 |

28 | 13 | 18 | 28.14 | 106.25 |

36 | 18 | 24 | 67.34 | 255.48 |

42 | 24 | 48 | 119.9 | 453.53 |

30 | 15 | 20 | 15.98 | 60.55 |

40 | 20 | 30 | 34.64 | 131.32 |

50 | 25 | 36 | 63.81 | 241.05 |

60 | 30 | 40 | 104.12 | 394.10 |

70 | 35 | 42 | 145.73 | 551.59 |

## Fish Tank Volume Calculation Formula

**Volume = Length × Width × Height**

This formula gives the volume in cubic units. To convert to gallons or liters:

- For gallons:
**Divide**the result by 231 (cubic inches in a gallon) - For liters:
**Multiply**the result (in cubic centimeters) by 0.001

Consider a tank measuring 30 inches × 12 inches × 18 inches.

Calculate volume: 30 × 12 × 18 =

6,480 cubic inchesConvert to gallons: 6,480 ÷ 231 ≈

28.05 gallons

## Aquarium Tank Size Chart

Shape | Length (cm) | Width (cm) | Height (cm) | Volume (L) | Volume (gallons) |
---|---|---|---|---|---|

Rectangular | 60 | 30 | 40 | 72 | 19.0 |

Rectangular | 45 | 20 | 20 | 18 | 4.8 |

Rectangular | 120 | 60 | 50 | 360 | 95.0 |

Corner Pentagon | 60 | 30 | 45 | 76 | 20.1 |

Bow Front | 80 | 30 | 50 | 120 | 31.7 |

Cylinder | 40 | N/A | 60 | 75 | 19.8 |

Flat Back Hexagon | 50 | 25 | 35 | 45 | 11.9 |

Quarter Cylinder | 30 | N/A | 50 | 35 | 9.2 |

## How to Calculate Aquarium Water Volume?

To calculate your aquarium’s water volume:

**Measure dimensions**: Use a tape measure for length, width, and height in inches.

**Apply the formula**: Multiply length × width × height.

**Convert units**: Divide by 231 for gallons or multiply by 0.001 for liters.

**For a tank measuring 36″ × 18″ × 24″:**

Volume = 36 × 18 × 24 = **15,552 cubic inches**

Gallons = 15,552 ÷ 231 ≈ **67.3 gallons**

## How Many Gallons is a 4 ft Long Fish Tank?

Therefore, a typical **4 ft long fish tank holds about 120 gallons**.

Let’s assume a common ratio:

**For a 48" × 24" × 24" tank:**

- Volume = 48 × 24 × 24 =
**27,648 cubic inches** - Gallons = 27,648 ÷ 231 ≈
**119.7 gallons**

## How Many Litres in a 4ft by 2ft Fish Tank?

A ** 4ft by 2ft fish tank typically holds about 453 liters**.

To calculate liters for a **4ft (48 inch)** by **2ft (24 inch)** tank, we need the height.

Let’s assume a ** 24-inch height**:

- Volume = 48 × 24 × 24 =
**27,648 cubic inches** - Convert to cubic centimeters:
453,060 cm³*27,648 × 16.387 =**** - Liters =
453 liters*453,060 × 0.001 ≈****

## 2 Feet by 1 Feet Aquarium Water Capacity in Litres

A ** 2ft by 1ft aquarium typically holds about 85 liters**.

For a ** 2ft (24 inch) by 1ft (12 inch)** tank, let’s assume a common height of

**:**

*18 inches*Volume =

24 × 12 ×18 =5,184 cubic inchesConvert to cubic centimeters:

5,184 ×16.387 =84,944 cm³Liters =

84,944 ×0.001 ≈84.9 liters

## How Many Litres in a 3ft by 2ft Fish Tank?

A ** 3ft by 2ft fish tank typically holds about 340 liters**.

For a ** 3ft (36 inch) by 2ft (24 inch)** tank, assuming a height of

**:**

*24 inches*Volume =

36 ×24 ×24 =20,736 cubic inches*Convert to cubic centimeters:

20,736 ×16.387 =339,795 cm³Liters =

339,795 ×0.001 ≈339.8 liters

## Sources / Reference URLs:

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