Linear percent timer chart
Hours and inches per pass.
Reid Bros. · American Irrigation · 9/19/2026
Yellow fields are inputs — everything else calculates live, same as the original workbook.
Speed, ft/min
12.63
Irrigated acres
320.0
GPM / acre
7.8
Inches / day
0.41
Hours / pass @ 100%
7.0
| % timer | Hours / pass | Inches |
|---|---|---|
| 100 | 7.0 | 0.12 |
| 60.0 | 11.6 | 0.20 |
| 40.0 | 17.4 | 0.30 |
| 30.0 | 23.2 | 0.40 |
| 24.0 | 29.0 | 0.50 |
| 20.0 | 34.8 | 0.60 |
| 17.1 | 40.7 | 0.70 |
| 15.0 | 46.5 | 0.80 |
| 13.3 | 52.3 | 0.90 |
| 12.0 | 58.1 | 1.00 |
| 10.9 | 63.9 | 1.10 |
| 10.0 | 69.7 | 1.20 |
| 9.2 | 75.5 | 1.30 |
| 8.6 | 81.3 | 1.40 |
| 8.0 | 87.1 | 1.50 |
| 6.9 | 101.6 | 1.75 |
| 6.0 | 116.2 | 2.00 |
| 5.3 | 130.7 | 2.25 |
| 4.8 | 145.2 | 2.50 |
| 4.0 | 174.2 | 3.00 |
| 3.4 | 203.3 | 3.50 |
| 3.0 | 232.3 | 4.00 |
These charts depend on end-gun range, PSI, and GPM you enter. They are a design aid, not a recommendation of timer setting or application rate.