Pump Head Pressure Calculator
Use a pump head pressure calculator to quickly determine the total head your pump must overcome. This tool helps you size pumps accurately, reduce energy waste, and improve system performance.
TDH Calculator
How to Use Pump Head Pressure Calculator
Follow these simple steps:
- Step 1: Enter Flow Rate: Input the required flow rate (GPM or L/min). This value depends on your system demand.
- Step 2: Add Static Head: Enter the vertical height difference between the source and discharge point. Measure in feet or meters.
- Step 3: Include Friction Loss: Add pipe friction losses based on pipe length, diameter, and fittings. Use standard charts or estimates if unsure.
- Step 4: Input Pressure Head: Convert system pressure requirements into head (feet or meters).
- Step 5: Click Calculate: The pump head pressure calculator will display the total dynamic head (TDH).
How to Calculate Pump Head Pressure
Use this formula:
Step-by-Step Example:
Given:
- Static Head = 30 feet
- Friction Loss = 15 feet
- Pressure Requirement = 20 psi
Step 1: Convert Pressure to Head
Formula: Head (ft) = Pressure (psi) × 2.31
Head = 20 × 2.31 = 46.2 feet
Step 2: Add All Values
TDH = 30 + 15 + 46.2
Step 3: Final Answer
TDH = 91.2 feet
The pump must generate at least 91.2 feet of head.
Pump Head Pressure Conversion Chart
Common conversions for quick reference:
| Pressure (psi) | Head (feet of water) |
|---|---|
| 1 psi | 2.31 ft |
| 5 psi | 11.55 ft |
| 10 psi | 23.1 ft |
| 20 psi | 46.2 ft |
| 30 psi | 69.3 ft |
| 40 psi | 92.4 ft |
| 50 psi | 115.5 ft |
Metric Conversion:
1 meter head = 9.81 kPa
1 bar = 10.2 meters head
Frequently Asked Questions (FAQs)
Pump head pressure is the height a pump can lift water, including losses and system pressure.
It saves time and ensures accurate pump sizing for efficient system design.
TDH is the total resistance the pump must overcome, including elevation, friction, and pressure.
Use pipe length, diameter, flow rate, and fittings data from standard charts or formulas.
No. Even small systems have friction loss that affects pump performance.
The pump will not deliver the required flow or pressure.
Yes. Convert pressure (psi or bar) into head for accurate calculations.
Most tools support feet, meters, psi, bar, and flow rate units.
No. Excess head wastes energy and increases operating cost.
Yes. It helps match pump curves with system requirements.