Well Pump Size Calculator
Find the ideal well pump size for your water needs. Enter your well depth, water demand, and other factors to determine the best pump size in horsepower or gallons per minute.
Well and Water Details
List of the Best Well Pump:
Understanding Well Pump Sizing
Choosing the right well pump size is essential for ensuring adequate water supply and efficient operation. The correct size depends on your well depth, water demand, pipe size, and pressure requirements.
How to Calculate Well Pump Size
The size of a well pump is calculated based on the total dynamic head (TDH) and water demand. Here's the formula:
| Parameter | Formula | Description |
|---|---|---|
| Total Dynamic Head (TDH) | Well Depth + Friction Loss + (Pressure Requirement × 2.31) | TDH in feet, including friction loss and pressure |
| Pump Horsepower (HP) | (Water Demand × TDH) ÷ (3960 × Efficiency) | Pump size in horsepower |
| Pump GPM | Water Demand | Pump size in gallons per minute |
Common Well Pump Sizes
Here are some standard well pump sizes and their typical applications:
| Pump Size | Typical Use |
|---|---|
| 0.5 HP | Shallow wells or low water demand |
| 1 HP | Medium-depth wells or moderate water demand |
| 2 HP | Deep wells or high water demand |
| 5 HP | Very deep wells or commercial applications |
Frequently Asked Questions
What is total dynamic head (TDH)?
TDH is the total height the pump must lift water, including well depth, friction loss, and pressure requirements.
How do I measure my well depth?
Measure the depth of your well from the ground surface to the water level. If unsure, consult a well drilling professional.
Can I use a pump that's too large for my well?
Using an oversized pump can lead to inefficiency, increased energy costs, and potential damage to the well. Always choose the correct size.
What is the difference between HP and GPM?
HP (Horsepower) measures the pump's power, while GPM (Gallons per Minute) measures the water flow rate. Both are important for sizing a well pump.