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E-bike Calculators

Physics-based tools for electric bike riders. Check EU compliance, plan routes by battery, and calculate real-world range and charging costs.

Check e-bike legality →

Tools

E-bike Legal CheckerEN 15194
Check if your e-bike meets EU and UK legal requirements. Motor power, assisted speed, and pedal assist compliance.
EU / UK / USInstant verdictNo account
E-bike Route PlannerGPX
Upload your GPX route to find out if your battery lasts. See remaining charge at every kilometre. Physics-based segment calculation.
GPX uploadBattery chartSafe / Tight / Empty
E-bike Range CalculatorPhysics model
Estimate realistic e-bike range from battery capacity, rider weight, terrain and assist level. Not manufacturer marketing numbers.
Physics modelTerrain & windTemperature
E-bike Charging Costvs car
Calculate charging cost per ride, per month, per year. Compare with driving a car on the same distance.
Cost per chargeAnnual totalvs car
All calculators based on EN 15194:2017 (EU e-bike standard) and physics models. No account required. Free forever.

EN 15194 explained

Three rules define a legal e-bike

Under EN 15194:2017, an electric bicycle classified as an EPAC (Electrically Power Assisted Cycle) must meet three requirements. Fail any one of them and the bike is reclassified as a moped — requiring registration, insurance, and a driving licence.

  • 250W maximum: The motor's continuous rated power must not exceed 250W. Peak power during acceleration can be higher, but the sustained output must stay within the limit.
  • 25 km/h cut-off: The motor must stop assisting once the bike reaches 25 km/h. The rider can still pedal faster under their own power — the motor simply disengages.
  • Pedal assist only: The motor may only activate when the rider is pedaling. Throttles (twist or thumb) that provide power without pedaling are not permitted for EPAC classification.

These rules apply across all EU member states and have been adopted in the UK post-Brexit. Use the e-bike legal checker to verify your specific bike against all three criteria.

Frequently asked questions

Is my e-bike legal in the EU?
Your e-bike is legal as an EPAC (no registration required) if it has a maximum continuous motor power of 250W, motor assistance cuts off at 25 km/h, and the motor only assists when pedaling. E-bikes with throttles or higher power/speed are classified as mopeds and require registration, insurance, and a driving licence.
How do I calculate realistic e-bike range?
The most accurate method is to upload your GPX route to the e-bike route planner, which calculates energy consumption segment by segment using a physics model. For a generic estimate without a GPX file, use the range calculator with your terrain and assist level.
How much does it cost to charge an e-bike per year?
At European electricity prices (approximately 0.30 EUR/kWh), charging a 500Wh battery 4 times per week costs approximately €37 per year. At UK prices (0.29 GBP/kWh) the annual cost is approximately £36. This is roughly equivalent to 2 tanks of fuel for a small petrol car.
Will my e-bike battery last a specific route?
Upload your route as a GPX file to the e-bike route planner. The calculator analyses each segment of the route, accounts for elevation gain, speed, rider weight, assist level and temperature, and shows remaining battery at every kilometre. The verdict shows clearly whether you will complete the route or where the battery will run out.
What is EN 15194 for electric bikes?
EN 15194:2017 is the European standard that defines the requirements for Electrically Power Assisted Cycles (EPAC) — the technical term for legal e-bikes. It specifies maximum motor power (250W continuous), maximum assisted speed (25 km/h), and the requirement for pedal sensing. E-bikes certified under EN 15194 do not require registration in EU member states.
How does e-bike range compare to manufacturer claims?
Manufacturer range figures are typically measured in Eco assist mode on flat terrain with a 75kg rider at 20°C with no wind. Real-world range for an average rider in Tour mode on rolling terrain is typically 40–60% of the quoted maximum. A bike advertised as having 100km range will realistically achieve 50–65km under typical commuting conditions.