Estimate electric bike range based on battery capacity, motor power, terrain, rider weight, and assist level. Plan rides with confidence.
One of the most common questions e-bike owners have is "how far can I ride on a single charge?" The answer depends on a complex interaction of factors including battery capacity, assist level, terrain, rider weight, wind, temperature, and riding style. Manufacturer range claims are typically measured under ideal conditions and may not reflect real-world riding.
Battery capacity is measured in watt-hours (Wh), which represents the total energy stored. A typical commuter e-bike battery ranges from 400 to 750 Wh, while cargo bikes may have 1,000+ Wh. The energy consumed per kilometer varies dramatically — a lightweight rider on flat terrain at low assist might use just 5 Wh/km, while a heavy rider climbing hills at maximum assist could use 25+ Wh/km.
This calculator models real-world e-bike energy consumption by accounting for all major factors that affect range. It helps you plan routes within your battery's capability, choose the right assist level for your trip distance, and understand which factors have the biggest impact on how far you can ride.
Running out of battery mid-ride is frustrating and potentially stranding. This calculator gives you realistic range estimates so you can plan routes confidently, choose the right assist level for your trip length, and avoid range anxiety. Keep these notes focused on your operational context. Tie the context to the calculator’s intended domain. Use this clarification to avoid ambiguous interpretation.
Range (km) = Battery Capacity (Wh) / Energy Consumption (Wh/km). Energy Consumption = Base Motor Draw + Terrain Factor + Weight Factor + Wind Factor + Temperature Factor. Motor draw varies by assist level from ~50W (Eco) to ~250W (Turbo) average.
Result: 65 km (40 miles)
A 500 Wh battery at Tour assist level with an 80 kg rider on rolling terrain consumes approximately 7.7 Wh/km. This gives an estimated range of 65 km. Switching to Eco mode would extend this to approximately 90 km.
E-bike batteries are rated in watt-hours (Wh), a measure of total energy capacity. The relationship between voltage, amp-hours, and watt-hours determines the battery's potential. Higher voltage systems (48V vs 36V) can deliver more power for the same amp-hour rating. Battery cells from reputable manufacturers (Samsung, LG, Panasonic) typically offer better real-world capacity and longevity than generic cells, even when labeled with the same Wh rating.
The single biggest factor in e-bike range is assist level — switching from Turbo to Eco can double or triple your range. The second biggest factor is terrain: climbing burns energy roughly 3-5 times faster than flat riding at the same speed. Rider weight matters too, but primarily on hills. On flat terrain, aerodynamic drag dominates, so reducing speed from 30 km/h to 25 km/h can improve range by 15-20% due to the cubic relationship between speed and air resistance.
Lithium-ion batteries degrade over time and use. To maximize battery lifespan: avoid storing at full charge or completely empty (40-80% is ideal for storage), keep the battery at room temperature when possible, avoid fast-charging unless necessary, and don't leave the battery in direct sunlight. A well-maintained battery retains 80% of its original capacity after 500-700 charge cycles, which translates to 3-5 years of regular commuting use.
Look on the battery label for Wh, or calculate it: Voltage (V) × Amp-hours (Ah) = Wh. For example, a 36V 14Ah battery = 504 Wh. A 48V 13Ah battery = 624 Wh.
Manufacturers test under ideal conditions: flat terrain, light rider, moderate speed, no wind, warm temperature. Real-world range is typically 50-75% of claimed range due to hills, wind, higher speeds, and rider weight.
Absolutely. The more human power you contribute, the less the motor needs to provide. Active pedaling versus passive riding can double your range. Low assist levels encourage more rider contribution.
Lithium batteries lose capacity in cold temperatures — expect 10-20% less range at 0°C versus 20°C. Below -10°C, range can drop by 30-40%. Storing the battery indoors before riding helps.
Yes. Under-inflated tires increase rolling resistance significantly. Maintaining proper tire pressure can improve range by 5-10%. Slick tires also offer better range than knobby off-road tires.
Most lithium-ion batteries last 500-1,000 full charge cycles before losing significant capacity. A battery ridden to 80% depth of discharge per ride may last longer than one consistently fully drained.