Sump Pump Sizing Calculator
Use a simple bucket-style pit test to estimate inflow and the pump capacity your basement needs.
Unplug the pump, then measure how far water rises in 60 seconds. Never work in a pit with the pump plugged in.
Enter a value between 0.25 and 24.
Enter a value between 3 and 20.
Recommended pump capacity (GPM)
3.3
- Measured inflow (GPM)
- 2.2
- Suggested horsepower
- 1/3 HP
Rule-of-thumb sizing only. Never work in a pit with the pump plugged in; unplug before measuring. A licensed plumber should confirm pump selection.
Have a Plumber Confirm the Size
We flow-test your pit for free and size the pump to your inflow and head height.
Related Services
Water rising now? Call (437) 782-5911, 24/7 live answer.
Free Assessment: Camera Scope + Flow Test + Subsidy Check
Get Your Exact Written Quote
Honestly, that is the whole pitch. We would rather spend an hour at your house now than pump out a finished basement later.
- Published CAD pricing
- 2-year workmanship warranty
- Licensed Master Plumber (ON)
- City subsidy filed at $0