Hydroelectric Power Calculator

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Calculates the power generated by hydroelectric turbines based on head, flow rate, and efficiency.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Water Head (m), Flow Rate (m³/s), Turbine Efficiency (%), Water Density (kg/m³), and Gravity (m/s²) in the units shown.

Step 2

Read Theoretical Power (W), Actual Power (W), and Actual Power (kW) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

See the inputs and their calculated results.

Water Head (m): 5 m; Flow Rate (m³/s): 1 m³/s; Turbine Efficiency (%): 75 %; Water Density (kg/m³): 1,000 kg/m³; Gravity (m/s²): 9.81 m/s²

Theoretical Power (W): 49,050 W; Actual Power (W): 36,787.5 W; Actual Power (kW): 36.7875 kW

Water Head (m): 20 m; Flow Rate (m³/s): 5 m³/s; Turbine Efficiency (%): 80 %; Water Density (kg/m³): 1,000 kg/m³; Gravity (m/s²): 9.81 m/s²

Theoretical Power (W): 981,000 W; Actual Power (W): 784,800 W; Actual Power (kW): 784.8 kW

Water Head (m): 100 m; Flow Rate (m³/s): 50 m³/s; Turbine Efficiency (%): 90 %; Water Density (kg/m³): 1,000 kg/m³; Gravity (m/s²): 9.81 m/s²

Theoretical Power (W): 49,050,000 W; Actual Power (W): 44,145,000 W; Actual Power (kW): 44,145 kW

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