Tool

Aquarium unit converter

Convert the units fishkeeping labels mix together — litres and gallons, °C and °F, ppm and mg/L.

Your result

100 in volume

Converted toValue
Litres100
US gallons26.42
UK gallons22

For temperature, enter °C or °F and both are shown; for concentration, ppm and mg/L are equal (1 mg/L = 1 ppm).

Related guides

Sources and research notes

Standard conversion factors: 1 US gallon = 3.785 L; 1 UK gallon = 4.546 L; 1 inch = 2.54 cm; hardness: 1 dGH ≈ 17.85 ppm.