Well Pump Sizing Calculator — सूत्र
## Well Pump Sizing
**Water HP = GPM x TDH / 3960**
**Brake HP = Water HP / Efficiency**
The constant 3960 comes from converting GPM and feet of head to horsepower units. Submersible pump efficiency is typically 50 to 70 percent. Multiply HP by 746 to get watts.
**Water HP = GPM x TDH / 3960**
**Brake HP = Water HP / Efficiency**
The constant 3960 comes from converting GPM and feet of head to horsepower units. Submersible pump efficiency is typically 50 to 70 percent. Multiply HP by 746 to get watts.
हल किया गया उदाहरण
10 GPM pump with 200 ft TDH, 60% efficiency.
- Water HP = 10 x 200 / 3960 = 0.505 HP
- Brake HP = 0.505 / 0.60 = 0.84 HP
- Motor = 0.84 x 746 = 627 W
- Select a 1 HP submersible pump.