18.00° Slope = 32.49% Grade
Results
Elevation Grade
32.49%
Elevation Grade for 18.00 degrees:
- Degrees: 18.00°
- Percent Slope: 32.49%
- Rise/Run Ratio: 0.3249
- 1 in X Ratio: 1 in 3.08
- Inches per Foot: 3.90"
- mm per Meter: 325 mm
Frequently Asked Questions
What is 18.00 degrees in other formats?
18.00 degrees equals 32.49% slope, or a 1 in 3.08 ratio (rise/run).
How steep is a 32.49% slope?
A 32.49% slope corresponds to a 18.00 degree angle and means for every 100 units of horizontal distance, there is 32.49 units of vertical rise.
What is the rise per foot for a 18.00 degree slope?
A 18.00 degree slope has a rise of 3.90 inches per foot of horizontal distance.
Nearby Slope Values
| Degrees | Percent Slope | 1 in X Ratio |
|---|---|---|
| 15.50° | 27.73% | 1 in 3.61 |
| 16.00° | 28.67% | 1 in 3.49 |
| 16.50° | 29.62% | 1 in 3.38 |
| 17.00° | 30.57% | 1 in 3.27 |
| 17.50° | 31.53% | 1 in 3.17 |
| 18.00° | 32.49% | 1 in 3.08 |
| 18.50° | 33.46% | 1 in 2.99 |
| 19.00° | 34.43% | 1 in 2.90 |
| 19.50° | 35.41% | 1 in 2.82 |
| 20.00° | 36.40% | 1 in 2.75 |
| 20.50° | 37.39% | 1 in 2.67 |
How to Calculate Elevation Grade
- Enter any slope measurement: degrees, percent grade, ratio, inches per foot, or mm per meter
- The calculator instantly converts to all other slope formats
- Results show: degrees, percentage, rise/run ratio, inverse ratio, and construction measurements
Formula Reference
- Percent Grade: Grade % = tan(angle in degrees) × 100
- Rise/Run Ratio: Ratio = tan(angle in degrees)
- Angle from Percent: Degrees = arctan(percent / 100) × (180/π)
- Inches per Foot: Rise per foot = tan(degrees) × 12
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