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Handy table for creating accessible walkways.
| Slope Conversion Table |
| Percent grade |
Slope |
Pitch |
| 0.5 |
1 ft per 200 ft |
1/16 in per 1 ft |
| 1 |
1 ft per 100 ft |
1/8 in per 1 ft |
| 2 |
1 ft per 50 ft |
¼ in per 1 ft |
| 2.5 |
1 ft per 40 ft |
5/16 in per 1 ft |
| 3 |
1 ft per 33 ft |
3/8 in per 1 ft |
| 3.3 |
1 ft per 30 ft |
7/16 in per 1 ft |
| 4 |
1 ft per 25 ft |
½ in per 1 ft |
| 5 |
1 ft per 20 ft |
5/8 in per 1 ft |
| 6 |
1 ft per 16.5 ft |
¾ in per 1 ft |
| 7 |
1 ft per 14.3 ft |
7/8 in per 1 ft |
| 8 |
1 ft per 12.5 ft |
1 in per 1 ft |
| 8.33 (ADA) |
1 ft per 12 ft |
1 in per 1 ft |
Maximum grade recommended per Americans with Disabilities Act (ADA)
is 8.33% or 1 foot horizontal for every 1" of vertical
height. Add to this the necessary resting areas for long ramps
and level approaches in and out of doorways or elevators.
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