Sump Pump Sizing Calculator
Free foundation tool

Sump Pump Sizing Calculator

Enter the space, how wet it gets and the lift to see the pump capacity and backup to plan for.

These tools give planning-level estimates from typical values. They are not quotes, designs or engineering, and results depend on your actual foundation, soil, drainage, site conditions and local rules. Only a site visit can confirm what a project needs, and we give you a written scope and price before any work begins.

How it works

Four quick steps.

  1. 01

    Enter the space

    Floor area of the basement or crawl space in square feet.

  2. 02

    Say how wet it gets

    Damp, wet after storms or standing water.

  3. 03

    Set the lift and run

    Height from the pit to the outlet and the length of the pipe.

  4. 04

    Read the result

    Suggested pump capacity, power and backup.

Tips

  • A pump that is too small works too hard, and one that is too large cycles too often.
  • A check valve and a lidded pit are standard parts of a good installation.
  • A battery backup is wise when power fails in storms or the basement is finished.
Questions

About this tool.

Is this the final size?

No. It is a planning guide. We measure the water, the pit and the discharge route on site.

Do I need a backup?

If outages happen in storms or the space is finished, a backup is a smart addition.

How often should I test it?

A few times a year and before the wet season.

Free estimate

Ready for a foundation you can count on?

Call us and we will visit, look closely at your foundation, crawl space or slab and give you a clear plan and a written scope.

Call NowFree Estimate