Pump Output Calculator

Pump Output Calculator converts a duplex pump's own liner size, stroke length, volumetric efficiency, and pump speed into flow rate and bbl/stroke output, using a standard duplex-pump liner/stroke reference table — plus the time needed to pump a target volume at that rate. Run it in reverse to solve for the pump speed needed to hit a target flow rate.

How It Works

bbl/stroke = 1 ÷ Stk./bbl. (standard liner/stroke Factor A, scaled from an 85% baseline to your own efficiency). Flow rate (gpm) = bbl/stroke × pump rate (stk/min) × 42. Time to pump = volume (bbl) × 42 ÷ flow rate (gpm).

See every formula worked through in detail on the Completion Engineering Formulas reference.

When You'd Use It

Before pumping cement, spacer, or any other fluid, engineers convert their rig pump's own liner/stroke/speed into a flow rate and the time a job will take — or work backward from a target rate to the pump speed needed to hit it.

Key Features

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