The slope calculator allows you to calculate the angle of a slope, that could be the angle of your driveway, the pitch of a roof, the angle of a hill etc. Slope calculations are particularly useful for ensuring that water flows correctly off a surface and for reducing stress, friction and energy when moving heavy objects using a ramp.

**Please provide a rating**, it takes seconds and helps us to keep this resource free for all to use

A Slope is defined as an inclined portion of ground, and is also known as a "Grade".

It can be specified in 4 different ways, angle of inclination, percentage, per mille and as a ratio.

**Note:** The ratio is specified as "1 in n" rather than the mathematical "1:n".

You may also be interested in the Gradient Calculator.

You may also be interested in the Gradient Calculator.

### About the Slope Calculator

This Slope Calculator includes the following algorithms

*Slope Length is the square root of (rise squared plus run squared)* *Angle of inclination is the tangent of (rise devided by run)* *percentage is 100 multiplyed by (rise devided by run)* *per mille is 1000 multiplyed by (rise devided by run)* *ratio is 1 to (run devided by rise)*

## Math Calculators

You may also find the following Math calculators useful.