Hydroelectric Power Calculator

Estimate power from water flow and head.

Flow rate (m³/s)

Head (drop height)

Efficiency (%)

Power output (kW) 166.77

Formula: P = ρ g Q H × efficiency

Step-by-step with your numbers:

1. Values used:

2. Flow rate = 1 m³/s

3. Head (drop height) = 20

4. Efficiency = 85 %

6. Power output = 166.77kW

Did we solve your problem today?

Estimate hydroelectric output from flow rate and the height the water drops.

The math behind it

P = water density (1000) × g (9.81) × flow × head × efficiency.

1 m³/s, 20 m head, 85% → ~167 kW.

What is head?

The vertical distance the water falls to the turbine.