Aquarium chart
Aquarium Heater Size Chart
Use this aquarium heater wattage chart to compare tank gallons and common heater sizes.
Last updated: May 2026
Chart values
| 10 gallons | 50 W |
|---|---|
| 20 gallons | 75 to 100 W |
| 40 gallons | 150 to 200 W |
| 55 gallons | 200 to 250 W |
| 75 gallons | 250 to 300 W |