Bosch eBike Range Calculator

Formula used

Usable Wh = Battery Wh × Battery Health %

Wh/km = Base Wh/km × assist × terrain × surface × wind × pressure × stops × weight × speed × grade × temperature

Range km = Usable Wh ÷ Wh/km

Example Data Table

How to use this calculator

Enter your battery size first. Add the battery health if your pack is older. Select the riding mode that best matches your trip. Add rider, bike, and cargo weight. Then choose terrain, surface, wind, temperature, and stop frequency. Press calculate. The result will appear above the form.

Bosch eBike Range Planning Guide

Range is one of the most important numbers for an eBike rider. It tells you how far your battery may take you before it needs another charge. This calculator helps you estimate that distance with practical riding factors.

Battery capacity is the starting point. A larger watt hour value normally gives more range. Yet capacity alone is not enough. Riding mode can change energy use quickly. Eco mode uses less support. Turbo mode gives stronger help, but it drains the battery faster.

Terrain also matters. Flat roads are easier for the motor. Hills need more power. Loose gravel and trail surfaces add rolling resistance. Low tire pressure can create the same problem. This is why the calculator includes surface and tire factors.

Total weight changes the result too. A heavier rider, loaded panniers, child seat, or trailer can reduce range. Speed is another key part. Faster riding often needs more energy because air resistance rises sharply.

Weather can reduce battery performance. Cold conditions may lower useful capacity. Headwinds can make the motor work harder. Frequent stops also use more energy because the bike must accelerate again.

Use the chart to compare assist modes. It gives a quick view of possible range changes. Use the CSV or PDF button to save the result. This helps you plan commutes, tours, deliveries, and weekend rides with better confidence.

FAQs

Is this an official Bosch tool?

No. It is an independent estimator using common eBike range factors.

Why does Turbo mode reduce range?

Turbo mode gives stronger motor support. That support uses more battery energy per kilometer.

Does rider weight affect range?

Yes. More total weight needs more energy, especially on hills and during starts.

Why is my real range different?

Real range changes with wind, tires, battery age, traffic, temperature, and riding style.

Can I use this for any eBike?

Yes. Enter the correct battery size and adjust the riding factors carefully.

What is Wh per km?

It means watt hours used for each kilometer. Lower values mean better efficiency.

Does cold weather reduce range?

Yes. Cold weather can reduce useful battery output and increase energy demand.

How can I improve range?

Use lower assist, correct tire pressure, steady speed, lighter cargo, and smoother routes.