Pump Sizing Calculator — Head, Flow, Curve
Why round up to the next standard motor size?
Motors are manufactured in discrete sizes (¼, ⅓, ½, ¾, 1, 1½ HP and up), so you select the next size at or above the computed brake horsepower. You should also verify NPSH-available against the pump curve and aim to operate near the best-efficiency point to avoid overload and premature wear.
Run the numbers for your project
Use the Pump Sizing Calculator — Head, Flow, Curve to get an exact answer for your inputs.
Open the calculatorRelated questions
Pro launch updates
Get notified when Pro launches, plus a monthly code-change digest. Email only — no account required.