Scape
Math
Metric
US
Aquarium heater size calculator
Tank water volume
L
Coldest room temperature
night/winter
°C
Target water temperature
°C
Top-off water per day
optional, open-top tanks
L/day
Suggested heater
–
Estimated heat loss
–
Evaporation loss
–
With 25% headroom
–
Free calculator by
ScapeMath
. Method, worked examples and sources on the full page.