Pump Affinity Law Calculator

Compare pump speed, flow, head, and power relationships using standard affinity laws. Results update live as you type.

Speed Ratio
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New Flow
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New Head
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New Power
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Inputs valid. Results update live as values change.

Engineering estimate only. Verify final values against project criteria, equipment submittals, manufacturer data, fluid properties, measured field conditions, and engineering judgment.

Need help applying this to a BAS sequence, hydronic system, trend review, or commissioning issue? Contact WEBC.