Convert slope between grade percentage, angle in degrees and ratio (1-in-N) — for roofs, roads, ramps and trails.
Math • grade ↔ degrees
Built on internationally recognised SI and standards-body conversion factors for dependable results.
Results update live as you type, with a clear visual breakdown across every unit at once.
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Slope can be written three ways: as a grade percentage (rise ÷ run × 100), as an angle in degrees, or as a ratio (1 in N). A 100% grade equals 45°. Builders, roofers, road engineers, hikers and accessibility planners switch between them constantly.
This converter turns a grade percent into degrees and a 1-in-N ratio, and converts an angle back to grade — useful for wheelchair ramps (ADA), roof pitch, driveways and trail gradients.