Complete Your Planning
Companion tools that share the same physics model.
Range Calculator
E-bike range is usually quoted as a single optimistic number. Real rides are not that simple: a 20 km/h headwind, a 600 m climb and a cold morning each take a visible slice out of the battery. This calculator models every one of them along your actual route, so the number you leave with is the number you arrive with.
At a Glance
- Use
- Touring, commuting, route testing
- Accuracy
- Typically within 2–5% of the real ride
- Inputs
- Battery, motor, rider load, terrain, weather, tires
- Route
- GPX upload or built-in demo routes
- Privacy
- Runs in your browser, nothing uploaded
E-Bike Range Calculator
The most honest range number you will get.
Not a brochure figure, not a Wh-per-km rule of thumb. A per-segment energy budget built from aerodynamics, rolling resistance, gradient and the weather you will actually ride in.
Physics, Not Averages
Drag, rolling resistance, gradient energy and motor efficiency are solved for every segment of the route instead of blended into one guess.
Weather Before It Costs You
Wind is resolved against each segment heading. Temperature shrinks usable capacity. Rain adds drag. All of it is priced in before you leave.
Every Climb Accounted For
Elevation from your GPX drives a climb-by-climb energy budget, with optional recuperation on the way back down.
For bike shops
Real-world range, right on your store.
Your shoppers ask one question: will it do my ride? The Shop Widget answers it for every bike you sell — on rides built from their own front door.
- Rides from each shopper's ZIP — real roads, hills and stop signs
- An honest range band for every bike, in your filters and product pages
- Leads with bike, ride and range — to your inbox and Klaviyo
- One script tag or the Shopify app embed, styled to your store
Products
Same engine. Different jobs.
The free calculator stays free. API is live to evaluate, Shop Widget pilots are open. Pro, Brands, and Fleet are waitlist lines — pilot prices, not a checkout.
Go ahead, plan the long one.
Charging-stop planning, optimal-speed recommendations and a battery timeline for the whole ride, so the day ends where you said it would.
Creator story
Built by one human, not a company.
This calculator started as a spreadsheet for planning alpine e-bike weekends and grew into a full physics model. It is maintained by one rider, published free, and shaped by the rides that went wrong.
Technical Specifications
The calculator uses physics models accounting for battery capacity, motor power, terrain, wind, weight, real-time weather conditions and tire pressure. Estimates are typically within 2–5% of actual performance.
Yes. Temperature, wind speed and direction, humidity and precipitation are pulled for your start time. Cold-weather penalties, wind resistance and rain drag are applied automatically.
Tire pressure drives rolling resistance. Optimal pressure, typically 40–50 PSI, can improve range by 4–12% compared to under-inflated tires. You can set exact front and rear pressure and see the impact.
Yes. The core single-route calculator is free, including weather, tire pressure, and efficiency metrics. Optional products like Pro, Shop Widget, and API are listed under Products.
Yes. Upload a GPX file to analyze your specific route with elevation profiles, segment-by-segment energy consumption, weather-adjusted calculations and optimal speed recommendations.