design
Slope & Gradient Calculator
Convert rise and horizontal run into slope percent, ratio, and angle.
Slope
7.5%
Angle
4.29°
Gradient
1:13.33
How this works
Slope percent = rise ÷ run × 100; angle = arctangent(rise ÷ run).
Worked example
A 0.6 m rise over 8 m is a 7.5% slope and about 4.3°.
FAQ
What is the Slope & Gradient Calculator used for?
Convert rise and horizontal run into slope percent, ratio, and angle. It is intended for quick planning, checking, and everyday decisions.
Can I use the result for a final contract or design?
Use it as a planning estimate. Confirm code limits, drainage direction, surface grip, and accessible-route requirements.
How can I improve the accuracy?
Use measured quantities, current supplier or lender rates, the correct units, and compare the result with drawings, invoices, or professional advice where the decision is safety-critical.