When to use this calculator
The actual sloping length is the hypotenuse of the rise-and-run right triangle.
Explore the slopes, layouts & dimensions calculators for other questions in this topic. For a related calculation, use the Ramp Slope Calculator: Calculate ramp gradient as rise over horizontal run.
PUTTING IT INTO PRACTICE
Ramp Length: 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 |
|---|---|
| Rise | 3 |
| Horizontal run | 4 |
| Result | 5 units |
- Check the input labels and enter the example values above.
- Apply the relationship: Ramp length = √(rise² + run²).
- The result is 5 units, rounded for display.
How to interpret your result
Use the same unit for rise and run; handrails, landings and compliance are not included.
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 length calculator useful?
The actual sloping length is the hypotenuse of the rise-and-run right triangle.
How do I use the ramp length calculator?
Enter 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?
Ramp length = √(rise² + run²).
What should I check before using the result?
Use the same unit for rise and run; handrails, landings and compliance are not included.
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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