Voltage to Motor Speed Calculator
Calculate electric motor speed based on voltage and motor Kv rating.
V
RPM/V
How to Use
- Enter the input voltage
- Enter the motor's Kv rating (RPM per volt)
- Adjust load factor if known (default 0.85)
- Click Calculate to get motor speed
Note: Actual speed may vary based on motor quality, temperature, and load conditions.
Frequently Asked Questions
Does higher voltage mean more speed for an electric boat?
Higher voltage allows more power at lower current, which reduces losses and allows higher motor RPM. A 48V system can typically achieve 50-100% more speed than 12V with the same motor size.
What voltage should I choose for my electric boat motor?
For trolling motors and dinghies, 12-24V is common. For primary propulsion on boats under 25ft, 36-48V works well. Larger vessels may use 96V or higher systems.