Sump Pump Size Calculator
Divide sump pit volume by the time in minutes you want it drained to determine pump capacity.
Basic sizing; consult a professional for high-risk areas.
Examples
- 40 gallons in 2 minutes ⇒ 20 gallons/min
- 25 gallons in 1 minute ⇒ 25 gallons/min
FAQ
Does this account for pump efficiency?
No, choose a pump with slightly higher capacity.
Can I use liters?
Convert liters to gallons before using the calculator.
What if the pit refills continuously?
Higher inflow may require a more powerful or backup pump.
Additional Information
- Typical household sump pumps range from 20–60 gallons per minute.
- Consider power outages and backup options for critical installations.