﻿ Electric bike power calculator

## ELECTRIC BIKE POWER CALCULATOR

This calculator allows to estimate what should be the minimum drive parameters to obtain the assumed speed and range of electric bike.
 Speed: km/h Range at one battery charging: km Total weight of vehicle: kg - more information Nominal voltage of drive: 24 36 48 60 72 Other V
SUGGESTION: The indicated nominal voltage of drive may turn out to be too low to obtain the assumed speed km/h, thus we recommend to apply nominal voltage from: V
Other travel parameters are set for typical electric bike, that is: Rolling resistance: 0.013; Aerodynamics coefficient: 0.9; Face surface: 0.46m2

### Suggested minimum parameters of drive:

 Engine power: W Energy accumulated in battery: Wh Battery capacity Ah - more information
If you have already estimated what should be the parameters of the drive you are interested in, you may try to search for it in our drive catalog

### Comments - 12

Bartek
2018-08-23 05:38:06
Below simulator algorithm:

Air resistance = 0.5 * 1.226 * Aerodynamics coefficient * Face surface * ( Speed ) up to third;

Rolling resistance on flat = Weight * Rolling coefficient * Acceleration of the earth
* Speed;

Rolling resistance on a hill = ( Weight * cos(tan(Angle of a hill
/ 100)) * (Rolling coefficient + tan(tan(Angle of a hill / 100))) ) * Acceleration of the earth * Speed ));
Dibakar Deb
2018-08-01 12:38:42
Can you share the calculations?
Shoji
2018-05-06 08:03:41
Can you mention the formulas for all of the above calculations please
Indranil
2018-05-06 06:44:57
Dear Bartek,

Can you please share with me the formula/algo for calculating power required for an ebike taking into account rolling friction and air resistance please

Thanks,
Indranil
Usman
2017-12-21 17:48:07
Will you please tell me the formula of these calculations..i will b very thankful to you.
Ashok
2017-09-26 12:24:58
When I using 250 watt bldc motor ., but I wish the maximum speed is 45km/h. What can I do. Please answer
Bartek
2017-05-18 09:17:15
Dear Ricky

Here you have calculation to reach 140km/h:
http://www.electricbikesimulator.com/calculator.php?language=en&speed=140&range=100&weight=400&voltage=12

I think you need engine with a motor rated at a minimum of 20kW
Exact calculations are complex. In the comments under the simulator you have an exact formula for calculating rolling and air resistance.
Ricky
2017-05-17 10:07:02
Dear Bartek

How to calculate the Power of the motor?

As i am planning to increase the speed of the motorcycle to 80 to 140kmph.

So kindly explain how to calculate.
Bartek
2017-04-20 08:32:56
Roman Van Loo

This calculator does not matter the size of the wheel.
Smaller wheel - lower speed - lower power required
Bartek
2017-04-20 08:31:08

Ricky

Watt hr / km - This parameter is shown in the simulator in the lower window.

In free time I will try to update the calculator so that the coefficients of resistance can be changed and to show the energy consumption wh / km

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