This aquarium heater size reference table shows the heater wattage for a range of tank volume values, assuming a watts per litre of 1. Every figure is computed with the same engine that powers our Aquarium Heater Size Calculator, so the numbers are exact.
| Tank volume | Heater wattage |
|---|---|
| 25 litres | 25 |
| 50 litres | 50 |
| 75 litres | 75 |
| 100 litres | 100 |
| 150 litres | 150 |
| 200 litres | 200 |
| 300 litres | 300 |
| 500 litres | 500 |
| 700 litres | 700 |
| 1,000 litres | 1,000 |
How to use this table
Find the row closest to your tank volume and read across to the heater wattage. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Aquarium Heater Size Calculator for a precise answer.
Need a value that is not in the table? — the Aquarium Heater Size Calculator does it instantly, for free, with the formula and a worked example built in.
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