๐งฑ Construction
Slope and Grade Calculator
Drainage pipe needs a fall of about a quarter inch per foot, while a driveway wants at least a two percent slope to shed water. Slope percentage is simply the rise divided by the run, times one hundred.
How it works
Rise
Run
Application
Slope
Angle
Slope ratio
Fall per foot
Suits the selected application?
Frequently asked questions
How do I use the Slope and Grade Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.