The eBike Efficiency Loss Calculator helps you understand how much power is being wasted during real-world riding.
While manufacturers list ideal Wh/km consumption, actual usage is usually higher due to terrain, acceleration, battery age, load, and riding speed.
This tool reveals the true efficiency drop and helps optimize performance.
How eBike Efficiency Loss Is Calculated
This calculator compares your ideal Wh/km consumption vs your actual Wh/km usage to determine:
- Efficiency Loss (%): How much power is wasted.
- Real Battery Usage: How many Wh you actually consume per km.
- Performance Drop: Decrease in efficiency due to load, hills, speed, tire pressure, etc.
Common Causes of High Efficiency Loss
- Poor tire pressure
- Old or degraded battery
- Riding at high speed
- Rough or hilly roads
- Heavy rider or cargo weight
- Low-quality or worn motor bearings
Tip: Keep your tire pressure between 45–60 PSI for the best Wh/km efficiency.
Frequently Asked Questions
Q: What is eBike efficiency loss?
A: It’s the difference between ideal (factory-rated) energy consumption and your real-world energy usage.
Q: What is a good Wh/km for eBikes?
A: Most efficient eBikes consume 12–18 Wh/km under normal riding conditions.
Q: Why is my actual Wh/km higher than the ideal value?
A: Because of rider weight, hills, wind, acceleration, road quality, battery age, and speed.
Q: Can I reduce efficiency loss?
A: Yes. Maintain correct tire pressure, reduce speed, use Eco mode, and keep your battery healthy.
Q: Does riding fast increase energy loss?
A: Yes. Wind resistance increases exponentially after 25 km/h, causing major efficiency loss.
