SlopeCalc: Grade & Ramp

SlopeCalc is the grade and slope calculator for landscapers, concrete and deck builders, civil and drainage work. Convert any slope between every representation and check compliance in seconds.

CONVERT ANY SLOPE
- Enter rise & run, or a grade %, angle, ratio (1:N) or rise per foot.
- Instantly see all of them at once: grade %, angle, ratio and rise per foot.

CHECK COMPLIANCE
- Drainage minimum (1% or 2%), ADA ramp maximum (8.33% / 1:12) and ADA cross-slope maximum (2.08% / 1:48), with clear pass / fail badges.

RUN & DROP
- Find the drop over a run at a given grade, or the grade from a run and drop.

STANDARDS REFERENCE
- Common grade standards and roof pitches at a glance.

MADE FOR THE FIELD
- Big, high-contrast numbers that read well outdoors.
- Buy once. No subscription. No ads. Works completely offline, with nothing to sign in to and no data leaving your device.