E-Bike Battery & Range Calculator
Estimate how far your electric bike can travel on one charge and find the battery capacity needed for a target distance.
Enter your battery voltage, Ah, motor setup, total weight and riding conditions for a practical real-world estimate.
Battery
Use the nominal voltage printed on the battery label.
Enter battery capacity in Ah. Example: 48V 20Ah.
This factor estimates usable energy rather than assuming 100% of rated capacity is available.
Older batteries normally deliver less usable energy than when new.
A reserve prevents planning around a battery that is nearly empty.
Motor & Riding Conditions
Use the motor's rated/nominal power, not a marketing peak figure.
Optional. Used to estimate controller-limited maximum electrical input.
Rider + bike + battery + passenger + cargo, all combined.
This represents how much of the bike's required propulsion energy comes from the electrical system.
Your Result
Battery Energy
-
Nominal battery capacity
Usable Energy
-
After health and reserve
Estimated Range
-
Estimated km per charge
Planning Range
-
Safer distance to plan around
Energy Consumption
-
Estimated Wh per km
Estimated Ride Time
-
At selected average speed
Average Electrical Power
-
Approximate during riding
Controller Max Input
-
Voltage × controller amps
Enter your battery and riding information, then calculate your estimated range.
Important: Range is an estimate, not a guaranteed mileage figure.
Actual range changes with speed, wind, rider weight, tyre pressure, battery temperature,
acceleration, road quality, battery age and riding technique.
Battery Needed for a Target Distance
Example: enter 100 if you want approximately 100 km of usable riding range.
Based on your selected voltage and riding conditions.
Your recommended battery size will appear here.
How This Calculator Works
Battery energy is calculated from voltage and amp-hours: Wh = Voltage × Ah.
The calculator then estimates energy use per kilometre using total riding weight, average speed, road resistance, terrain, traffic and riding mode. Battery chemistry, battery health and your selected reserve reduce the amount of rated battery energy treated as practically available.
This method is designed for planning purposes and is more useful than comparing batteries by Ah alone. A 60V 20Ah battery stores more nominal energy than a 48V 20Ah battery, even though both are rated at 20Ah.
Quick Battery Examples
| Battery | Nominal Energy | Typical Use |
|---|---|---|
| 48V 15Ah | 720 Wh | Smaller / lighter commuter setup |
| 48V 20Ah | 960 Wh | Common commuter / general-purpose size |
| 48V 30Ah | 1,440 Wh | Longer-range setup |
| 60V 20Ah | 1,200 Wh | Higher-voltage performance setup |
| 72V 20Ah | 1,440 Wh | High-voltage / high-performance setup |
| 72V 30Ah | 2,160 Wh | High-capacity long-range setup |
These are nominal energy values only. Actual usable energy depends on battery chemistry,
BMS limits, battery health, temperature, current demand and operating conditions.
Frequently Asked Questions
How do I calculate e-bike battery range?
Battery range depends mainly on battery energy in Wh and energy consumption in Wh/km.
Battery energy is calculated from voltage × Ah. Higher speed, heavier loads, hills,
rough roads and throttle-heavy riding normally reduce range.
How far will a 48V 20Ah e-bike battery go?
A 48V 20Ah battery has 960 Wh of nominal energy. Actual kilometres depend on motor,
total weight, speed, terrain, traffic, battery condition and riding style.
Use the calculator above for a personalized estimate.
Is a higher Ah battery always better?
Higher Ah normally means more stored energy when voltage and battery chemistry are comparable,
but it also usually increases battery size, weight and cost. Battery voltage must also match
your controller and motor system.
Does motor wattage determine range?
Motor wattage alone does not determine range. Two bikes with the same motor rating can
use very different amounts of energy depending on speed, load, terrain, controller settings
and how much the rider pedals.
Can this calculator tell me what battery size I need?
Yes. Enter your desired travel distance in the target range section and the calculator
estimates the Ah required at your selected voltage and riding conditions.
E-Bike Battery & Range Calculator
Estimate how far your electric bike can travel on one charge and find the battery capacity needed for a target distance.
Enter your battery voltage, Ah, motor setup, total weight and riding conditions for a practical real-world estimate.
Battery
Use the nominal voltage printed on the battery label.
Enter battery capacity in Ah. Example: 48V 20Ah.
This factor estimates usable energy rather than assuming 100% of rated capacity is available.
Older batteries normally deliver less usable energy than when new.
A reserve prevents planning around a battery that is nearly empty.
Motor & Riding Conditions
Use the motor's rated/nominal power, not a marketing peak figure.
Optional. Used to estimate controller-limited maximum electrical input.
Rider + bike + battery + passenger + cargo, all combined.
This represents how much of the bike's required propulsion energy comes from the electrical system.
Your Result
Battery Energy
-
Nominal battery capacity
Usable Energy
-
After health and reserve
Estimated Range
-
Estimated km per charge
Planning Range
-
Safer distance to plan around
Energy Consumption
-
Estimated Wh per km
Estimated Ride Time
-
At selected average speed
Average Electrical Power
-
Approximate during riding
Controller Max Input
-
Voltage × controller amps
Enter your battery and riding information, then calculate your estimated range.
Important: Range is an estimate, not a guaranteed mileage figure.
Actual range changes with speed, wind, rider weight, tyre pressure, battery temperature,
acceleration, road quality, battery age and riding technique.
Battery Needed for a Target Distance
Example: enter 100 if you want approximately 100 km of usable riding range.
Based on your selected voltage and riding conditions.
Your recommended battery size will appear here.
How This Calculator Works
Battery energy is calculated from voltage and amp-hours: Wh = Voltage × Ah.
The calculator then estimates energy use per kilometre using total riding weight, average speed, road resistance, terrain, traffic and riding mode. Battery chemistry, battery health and your selected reserve reduce the amount of rated battery energy treated as practically available.
This method is designed for planning purposes and is more useful than comparing batteries by Ah alone. A 60V 20Ah battery stores more nominal energy than a 48V 20Ah battery, even though both are rated at 20Ah.
Quick Battery Examples
| Battery | Nominal Energy | Typical Use |
|---|---|---|
| 48V 15Ah | 720 Wh | Smaller / lighter commuter setup |
| 48V 20Ah | 960 Wh | Common commuter / general-purpose size |
| 48V 30Ah | 1,440 Wh | Longer-range setup |
| 60V 20Ah | 1,200 Wh | Higher-voltage performance setup |
| 72V 20Ah | 1,440 Wh | High-voltage / high-performance setup |
| 72V 30Ah | 2,160 Wh | High-capacity long-range setup |
These are nominal energy values only. Actual usable energy depends on battery chemistry,
BMS limits, battery health, temperature, current demand and operating conditions.
Frequently Asked Questions
How do I calculate e-bike battery range?
Battery range depends mainly on battery energy in Wh and energy consumption in Wh/km.
Battery energy is calculated from voltage × Ah. Higher speed, heavier loads, hills,
rough roads and throttle-heavy riding normally reduce range.
How far will a 48V 20Ah e-bike battery go?
A 48V 20Ah battery has 960 Wh of nominal energy. Actual kilometres depend on motor,
total weight, speed, terrain, traffic, battery condition and riding style.
Use the calculator above for a personalized estimate.
Is a higher Ah battery always better?
Higher Ah normally means more stored energy when voltage and battery chemistry are comparable,
but it also usually increases battery size, weight and cost. Battery voltage must also match
your controller and motor system.
Does motor wattage determine range?
Motor wattage alone does not determine range. Two bikes with the same motor rating can
use very different amounts of energy depending on speed, load, terrain, controller settings
and how much the rider pedals.
Can this calculator tell me what battery size I need?
Yes. Enter your desired travel distance in the target range section and the calculator
estimates the Ah required at your selected voltage and riding conditions.