10 gallon tank: size, liters and setup numbers
The 10 gallon is the classic starter tank and a popular quarantine or hospital tank. It suits nano fish, shrimp and a betta, but its small volume means ammonia and temperature can change fast, so test often.
| Typical dimensions | 20 × 10 × 12 in 50.8 × 25.4 × 30.5 cm |
|---|---|
| Volume | 10 US gallons 37.9 liters |
| Realistic water after substrate and decor | About 8.5 gal About 32.2 L |
| Water weight | About 83 lb About 38 kg |
| Gravel for a 1 inch bed | About 12 lb About 5 kg |
| Gravel for a 2 inch bed | About 23 lb About 10 kg |
| Heater (room 8°F / 4.4°C cooler) | 50 W |
| Heater (room 15°F / 8.3°C cooler) | 75 W |
| Filter flow (4 to 6 times per hour) | 40 to 60 GPH 151 to 227 L/h |
Dimensions vary a little between brands. For exact numbers, measure your tank and use the calculators below.
Plan the rest of your 10 gallon tank
Common questions
- How many liters is a 10 gallon tank?
- A 10 gallon tank holds about 37.9 liters when filled to the brim. With substrate and decorations, the real water volume is usually closer to 32 liters.
- How much does a 10 gallon tank weigh when full?
- The water alone weighs about 83 pounds (38 kg). Glass, substrate and rock add more on top, so choose a stand rated for the full weight.
- What size heater does a 10 gallon tank need?
- If your room stays around 8°F below your target water temperature, a 50 W heater is a good fit. For colder rooms, around 15°F below target, go with 75 W.