Watt-hour (Wh) to Ampere-hour (Ah) Calculator
Ampere-hours (Ah): 0 Ah
Watt-Hour (Wh) to Ampere-Hour (Ah) Calculator: Easy Conversion for Battery Capacity
When working with batteries and electrical systems, you’ll often come across the need to convert energy units like Watt-Hours (Wh) to charge capacity units like Ampere-Hours (Ah). A Wh to Ah calculator makes this conversion quick and accurate.
What is a Watt-Hour (Wh)?
A Watt-Hour is a unit of energy representing the amount of work done or energy consumed over time. It is commonly used to measure the total electrical energy stored in or consumed by a device.
- Wh = Power (Watts) × Time (Hours)
For example, a 100W device running for 1 hour uses 100 Wh of energy.
What is an Ampere-Hour (Ah)?
An Ampere-Hour measures the electric charge capacity of a battery. It represents the amount of current (in Amperes) a battery can supply over one hour.
- Ah = Current (Amps) × Time (Hours)
For instance, a battery rated at 10 Ah can supply 10 amps for 1 hour, or 1 amp for 10 hours.
Why Convert Wh to Ah?
- To understand battery capacity in terms of energy (Wh) and charge (Ah).
- To select the right battery based on device energy needs.
- To plan battery backup times and manage power consumption.
- Helpful for engineers, electricians, and battery users.
How to Convert Wh to Ah?
The key factor in converting Wh to Ah is the voltage (V) of the battery or system: Ah=WhVAh = \frac{Wh}{V}Ah=VWh
Where:
- AhAhAh = Ampere-Hours
- WhWhWh = Watt-Hours
- VVV = Voltage in Volts
How the Calculator Works
- Input the energy in Watt-Hours (Wh).
- Enter the system or battery voltage (Volts).
- The calculator divides Wh by V to give the battery capacity in Ampere-Hours (Ah).
Benefits of Using This Calculator
- Quick conversion between Wh and Ah.
- Helps in battery sizing and selection.
- Saves time and avoids manual calculation errors.
- Useful in solar power, electric vehicles, UPS systems, and portable electronics.
Important Tips
- Always use the voltage rating of your specific battery or system.
- The calculator assumes constant voltage — real batteries may have voltage variations.
- Use this conversion for rough estimates and planning.