Slope Percent from Angle (Degrees) Reference Values
Convert an angle in degrees to slope percent using slope% = tan(θ) × 100.
Table of Contents
Reference Value Index
This page lists 23 reference values for quick browsing and lookup.
All Reference Values
- -80 deg = -567.128182 percent
- -75 deg = -373.205081 percent
- -70 deg = -274.747742 percent
- -60 deg = -173.205081 percent
- -50 deg = -119.175359 percent
- -45 deg = -100 percent
- -30 deg = -57.735027 percent
- -20 deg = -36.397023 percent
- -15 deg = -26.794919 percent
- -10 deg = -17.632698 percent
- -5 deg = -8.748866 percent
- 0 deg = 0 percent
- 5 deg = 8.748866 percent
- 10 deg = 17.632698 percent
- 15 deg = 26.794919 percent
- 20 deg = 36.397023 percent
- 30 deg = 57.735027 percent
- 45 deg = 100 percent
- 50 deg = 119.175359 percent
- 60 deg = 173.205081 percent
- 70 deg = 274.747742 percent
- 75 deg = 373.205081 percent
- 80 deg = 567.128182 percent
Reference Table
| Angle (Degrees) | Slope Percent |
|---|---|
| -80 deg | -567.128182 percent |
| -75 deg | -373.205081 percent |
| -70 deg | -274.747742 percent |
| -60 deg | -173.205081 percent |
| -50 deg | -119.175359 percent |
| -45 deg | -100 percent |
| -30 deg | -57.735027 percent |
| -20 deg | -36.397023 percent |
| -15 deg | -26.794919 percent |
| -10 deg | -17.632698 percent |
| -5 deg | -8.748866 percent |
| 0 deg | 0 percent |
| 5 deg | 8.748866 percent |
| 10 deg | 17.632698 percent |
| 15 deg | 26.794919 percent |
| 20 deg | 36.397023 percent |
| 30 deg | 57.735027 percent |
| 45 deg | 100 percent |
| 50 deg | 119.175359 percent |
| 60 deg | 173.205081 percent |
| 70 deg | 274.747742 percent |
| 75 deg | 373.205081 percent |
| 80 deg | 567.128182 percent |
Frequently Asked Questions
Frequently asked questions for Slope Percent from Angle (Degrees) and its reference values.
What does the Slope Percent from Angle (Degrees) calculator do?
It helps with converting slope angle to grade percent for design and terrain calculations.
What formula does the Slope Percent from Angle (Degrees) calculator use?
Slope percent = tan(angle in degrees) × 100.
What inputs are valid?
Angles are valid except where tangent is undefined, such as 90° + 180°k.
When would I use this?
converting slope angle to grade percent for design and terrain calculations
Methodology and Review
Each row on this page links to a value detail page derived from the same conversion data file as the main calculator and reference table. This reduces inconsistencies across page variants.
Editorial metadata and structured data are rendered across the converter page and linked value pages. Review policies are documented in our review process and editorial policy.