PORT CALCULATOR
E Bike Range
A precise tool.
What is the E Bike Range & How does it work?
The range of an electric bicycle depends primarily on the amount of usable electrical energy stored in its battery and how quickly that energy is consumed while riding.
Usable energy is the product of the batteryβs nominal capacity (C_{bat}) and the drivetrainβs overall efficiency (Ξ·). The average power required per kilometre (P_{km}) is influenced by rider weight, rolling resistance, terrain, and speed. Combining these gives a simple predictive model:
By entering realistic values for each parameter, cyclists can estimate how far they can travel on a single charge, helping them plan routes and choose appropriate component specifications.
R = \frac{C_{bat}\cdot\eta}{(w\cdot k_{rr} + f_{terrain})\cdot v}
R = range (km)
C_{bat} = battery capacity (Wh)
Ξ· = drivetrain efficiency (fraction)
w = rider weight (kg)
k_{rr} = rollingβresistance coefficient
f_{terrain} = terrain factor (WΒ·hΒ·kmβ»ΒΉ)
v = average speed (kmΒ·hβ»ΒΉ)
C_{bat} = battery capacity (Wh)
Ξ· = drivetrain efficiency (fraction)
w = rider weight (kg)
k_{rr} = rollingβresistance coefficient
f_{terrain} = terrain factor (WΒ·hΒ·kmβ»ΒΉ)
v = average speed (kmΒ·hβ»ΒΉ)
Parameters
Result
β
Frequently Asked Questions
How does battery capacity affect e-bike range?
Battery capacity (C_bat) directly impacts the range. A larger battery holds more energy, extending the distance you can travel.
What is drivetrain efficiency in an e-bike?
Drivetrain efficiency (Ξ·) measures how effectively the motor converts electrical energy into mechanical power to move the bike.
How does rider weight affect e-bike range?
Heavier riders require more power to maintain speed, which reduces overall range for a given battery capacity.
What role does terrain play in e-bike range?
Hilly terrain consumes more energy than flat ground, reducing the distance you can travel on a single charge.
Can I improve my e-bike’s range without changing the battery?
Yes, improving drivetrain efficiency, reducing rider weight, and optimizing riding speed can all extend your range.
How do I calculate average power required per kilometre (P_km)?
P_km is calculated by considering factors like rider weight, rolling resistance, terrain, and speed. The calculator uses these to estimate the power needed for each kilometer.
What is the formula used in this e-bike range calculator?
The formula used is R = (C_bat * Ξ·) / (w * k), where R is range, C_bat is battery capacity, Ξ· is efficiency, w is rider weight, and k is a factor combining rolling resistance, terrain, and speed.
Results are for informational purposes only and do not constitute professional advice.