Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Ideal Euclidean geometry. Use one consistent length unit. Measurements and derived quantities use floating-point arithmetic. Signed rise distinguishes ascent from descent. Run is horizontal distance, not slope length.
Example Calculation
- Vertical rise: 3 units
- Horizontal run: 4 units
Rise 3 and horizontal run 4 give 36.8699°, grade 75% and slope length 5.
Frequently asked questions
How do I use this calculator?
Enter vertical rise, horizontal run. The result updates automatically. Use Reset to restore the example values.
What method does it use?
angle=atan(rise/run); grade=100 rise/run; slope length=√(rise²+run²).. Ideal Euclidean geometry. Use one consistent length unit. Measurements and derived quantities use floating-point arithmetic. Signed rise distinguishes ascent from descent. Run is horizontal distance, not slope length.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.