Rainfall Calculator

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Calculates total rainfall depth or rate based on measurements over time.

Rainfall Calculator gives you a faster way to work through practical calculation scenarios without rebuilding the same calculation from scratch every time. Start with Rainfall Depth (mm) and Rainfall Duration (hours) and use the live outputs to estimate Rainfall Rate (mm/hour), Rainfall Depth (inches), and Rainfall Rate (inches/hour) in one pass. This page is built to help you compare scenarios quickly, validate rough assumptions, and move into a related calculator when you need a second angle on the same problem.