Calculate your cost
Start with the example below, then replace the wattage, daily runtime, and rate with the numbers for your sump pump.
This setup uses about 12 kWh in a 30-day month.
Please enter valid values within the ranges shown.
| Schedule | Hours/day | Cost/month |
|---|---|---|
| Half runtime | 0.25 | $1.13 |
| Page example | 0.5 | $2.26 |
| Longer runtime | 0.75 | $3.39 |
Same 800-watt input and 18.83¢/kWh rate; only runtime changes.
Formula for the page example
0.8 kW × 0.5 hr × $0.1883 = $0.08 per day
Convert watts to kilowatts, multiply by the active hours used each day, then multiply by the electricity price in dollars per kWh. Multiply the daily result by 30 for the monthly estimate shown above.
How to read this estimate
A sump pump may stay idle for days, then cycle often during rain or snowmelt. For a better runtime estimate, use a cycle counter or a plug-in meter that is specifically rated for the pump and its installation.
Use this as a baseline until you can check the label or measure the sump pump directly. Model, settings, condition, climate, and household routine can all change the result.
What changes the cost?
- 01
Motor horsepower, pumping head, and discharge resistance
- 02
Rainfall, groundwater level, and drainage around the foundation
- 03
Cycle frequency, float setting, and check-valve condition
Ways to spend less
- Keep the pit, float, and discharge path clear.
- Correct short cycling and a failed check valve promptly.
- Direct exterior drainage away from the foundation where permitted.