When to use this calculator
A slope percentage is not an angle in degrees. Use horizontal run rather than the inclined ramp length.
Explore the slopes, layouts & dimensions calculators for other questions in this topic. For a related calculation, use the Roof Pitch Calculator: Find a roof angle from its vertical rise and horizontal run.
PUTTING IT INTO PRACTICE
Ramp Slope: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Vertical rise | 0.5 |
| Horizontal run | 5 |
| Result | 10 % |
- Check the input labels and enter the example values above.
- Apply the relationship: Gradient (%) = rise/run × 100.
- The result is 10 %, rounded for display.
How to interpret your result
Geometry only; this does not establish accessibility or building-code compliance.
Use horizontal run for a slope calculation and perpendicular rise for height. A slope percentage is not an angle in degrees. These geometric tools do not establish compliance with local design or building requirements.
Frequently asked questions
Is a 10% slope the same as a 10° angle?
No. A 10% slope has a rise/run ratio of 0.10. Its angle is the arctangent of that ratio.
When is the ramp slope calculator useful?
A slope percentage is not an angle in degrees. Use horizontal run rather than the inclined ramp length.
How do I use the ramp slope calculator?
Enter vertical rise, horizontal run. The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Gradient (%) = rise/run × 100.
What should I check before using the result?
Geometry only; this does not establish accessibility or building-code compliance.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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