Slope/Grade ??? (Rise/Run ↔ % ↔ °)
Convert rise/run, percent, degrees, and 1:n ratio with a single input.
??s
?? mode
Unit
Display unit
Direction
Run must be greater than 0.
Accepts 2.5 or 2.5%
±90° is not allowed.
1 :
n must be greater than 0.
??
Rounding
Mode
??
Slope (%)
—
Angle (°)
—
rise:run display
rise:run
—
rise:run is normalized with run=1 (selected unit)
Ratio (1:n)
—
rise/run (decimal)
—
mm / m
—
in / ft
—
Breakdown
| ?? | Raw | Rounded | ?? |
|---|---|---|---|
| Slope (%) | — | — | |
| Angle (°) | — | — | |
| Ratio (1:n) | — | — | |
| rise:run | — | — | |
| rise/run (decimal) | — | — | |
| mm / m | — | — | |
| in / ft | — | — |
Reference: drainage guidance
Reference- For surfaces that need drainage, 1–2% is often cited as a rough guideline.
- Recommended values vary by use (outdoor/indoor/flooring/standards).
- Always follow the relevant standards and specifications.
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What is the difference between % and °?
% expresses rise/run as a percentage. ° expresses the angle. They represent the same slope in different formats.
How do I read 1:n?
It means a rise of 1 for every horizontal distance of n. Example: 1:40 is “go 40, rise 1.”
What is a negative slope?
A downhill slope. % and ° are signed; 1:n is shown as “Down 1:n.”