Slope Percent Calculator

Convert rise and run into slope percent, grade ratio, and angle reference for jobsite layout. Built for quick jobsite use on a phone, tablet, or laptop.

Enter measurements

Riseft

Runft

This is an estimating tool. Verify against plans, supplier specs, waste factors, and local requirements before purchasing material.

Estimated result

How to use this calculator

Slope percent = rise ÷ run × 100.
Use horizontal run, not sloped distance, when calculating grade.

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