Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Use net head after conveyance losses and overall turbine-generator efficiency. Seasonal flows and environmental constraints are not modeled.
Example Calculation
- Water flow: 0.1 m³/s
- Net head: 10 m
- Overall efficiency: 80 %
0.1 m³/s through 10 m net head at 80% overall efficiency gives about 7.845 kW.
Method references
Frequently asked questions
How do I use this calculator?
Enter water flow, net head, overall efficiency. The result updates automatically. Use Reset to restore the example values.
What method does it use?
power=ρgQHη with ρ=1000 kg/m³ and g=9.80665 m/s².. Use net head after conveyance losses and overall turbine-generator efficiency. Seasonal flows and environmental constraints are not modeled.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.