About This Calculator
This tool provides a quick estimate of stormwater runoff volume for a given design rainfall event. Results are approximate and should be validated by a qualified engineer for detailed design purposes.
Calculator
Stormwater Runoff Calculator
Estimate your building's stormwater generation and retention requirements.
Calculate Your Runoff
m²
mm
Typical values: 0.75–1.0 for roofs, 0.5–0.75 for paved surfaces
Using the Results
Use the calculated runoff volume to estimate retention system requirements and evaluate the ROI of stormwater management upgrades. Contact our team for detailed engineering analysis.
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