Use this chart as a general guideline for sizing a motor for pedestal-mount or pulley-driven pumps. Other factors (such as viscosity, particulate matter, etc.) may require increased horsepower. Use individual pump curves (when given) for more precise calculations.
| GPM | Horsepower required to lift water (at 60°F) to a given height |
| 5 ft | 10 ft | 15 ft | 20 ft | 25 ft | 30 ft | 35 ft | 40 ft | 50 ft |
| 5 | 0.006 | 0.013 | 0.019 | 0.025 | 0.032 | 0.038 | 0.044 | 0.051 | 0.063 |
| 10 | 0.013 | 0.025 | 0.038 | 0.051 | 0.063 | 0.076 | 0.088 | 0.10 | 0.13 |
| 15 | 0.019 | 0.038 | 0.057 | 0.076 | 0.095 | 0.11 | 0.13 | 0.15 | 0.19 |
| 20 | 0.025 | 0.051 | 0.076 | 0.10 | 0.13 | 0.15 | 0.18 | 0.20 | 0.25 |
| 25 | 0.032 | 0.063 | 0.095 | 0.13 | 0.16 | 0.19 | 0.22 | 0.25 | 0.32 |
| 30 | 0.038 | 0.076 | 0.11 | 0.15 | 0.19 | 0.23 | 0.27 | 0.30 | 0.38 |
| 35 | 0.044 | 0.088 | 0.13 | 0.18 | 0.22 | 0.27 | 0.31 | 0.35 | 0.44 |
| 40 | 0.051 | 0.10 | 0.15 | 0.20 | 0.25 | 0.30 | 0.35 | 0.40 | 0.51 |
| 45 | 0.057 | 0.11 | 0.17 | 0.23 | 0.28 | 0.34 | 0.40 | 0.46 | 0.57 |
| 50 | 0.063 | 0.13 | 0.19 | 0.25 | 0.32 | 0.38 | 0.44 | 0.50 | 0.63 |
| 60 | 0.076 | 0.15 | 0.23 | 0.30 | 0.38 | 0.46 | 0.53 | 0.61 | 0.76 |
| 70 | 0.088 | 0.18 | 0.27 | 0.35 | 0.44 | 0.53 | 0.62 | 0.71 | 0.88 |
| 80 | 0.10 | 0.20 | 0.30 | 0.40 | 0.50 | 0.61 | 0.71 | 0.81 | 1.0 |
| 90 | 0.11 | 0.23 | 0.34 | 0.46 | 0.57 | 0.68 | 0.80 | 0.91 | 1.1 |
| 100 | 0.13 | 0.25 | 0.38 | 0.50 | 0.63 | 0.76 | 0.88 | 1.00 | 1.3 |