Wh to mah Calculator – Watt Hours to Milliamp Hours Conversion

Welcome to our Wh to mAh Calculator webpage! This handy tool allows you to effortlessly convert energy units from Watt Hours (Wh) to Milliamp Hours (mAh) for different voltage levels. Our calculator provides quick and accurate conversions, whether you’re dealing with battery capacities, power banks, or electronic devices. Input the energy in watt-hours and the corresponding voltage, and instantly get the charge in milliamp-hours. Simplify your energy calculations and make informed decisions about your electronic devices’ power needs. Try out our user-friendly Wh to mAh Calculator now!

Enter energy in watt-hours: Wh
Enter voltage in volts: V
Charge result in milliamp-hours: mAh

What is a Wh to mah calculator?

A Wh (watt-hour) to mAh (milliamp-hour) calculator is a tool used to convert electrical energy measurements from watt-hours to milliamp-hours. These units are commonly used to quantify energy and charge in different electrical devices and systems.

Watt-hour (Wh) is a unit of energy, representing the amount of electrical energy consumed or produced by a device over one hour at a constant rate of one watt. It is commonly used to measure the energy capacity or consumption of batteries, power banks, electric vehicles, and other electronic devices.

Milliamp-hour (mAh), on the other hand, is a unit of electric charge. It measures the electric charge that can flow through a device in one hour at a constant rate of one milliampere. It is commonly used to specify the capacity of batteries and the charging or discharging rates of devices that use a constant current.

The conversion between watt-hours and milliamp-hours depends on the voltage of the electrical system. The formula to convert from watt-hours to milliamp-hours is as follows:

Q(mAh) = 1000 × E(Wh) / V(V)

Where: Q(mAh) = Charge in milliamp-hours (mAh) E(Wh) = Energy in watt-hours (Wh) V(V) = Voltage in volts (V)

By using this formula, the Wh to mAh calculator allows users to easily convert energy measurements between these two units, helping them better understand the energy capacity and consumption of various electronic devices and battery systems.

How does this Wh to mah calculator work?

Imagine you have a device like a mobile phone or a power bank. These devices store and use electrical energy to function. The energy they store is measured in watt-hours (Wh). For example, if a device has a battery capacity of 3000 Wh, it means it can provide 3000 watts of energy for one hour or 1500 watts for two hours, and so on.

Now, sometimes we want to know how much charge (in milliamp-hours or mAh) a device’s battery can hold or how much charge it has used up. Charge is like the amount of electricity that flows through the device. Milliamp-hours (mAh) is a common unit to measure charge.

The calculator you see here helps you convert from watt-hours (Wh) to milliamp-hours (mAh) for a specific voltage (V). Voltage is like the pressure that pushes the electricity through the device.

To use the calculator:

  1. You enter the amount of energy in watt-hours (Wh) of your device in the first box. For example, if your device’s battery has a capacity of 3000 Wh, you enter 3000 in this box.
  2. Then, you enter the voltage (V) of your device in the second box. Voltage is usually written on the charger or in the device’s specifications. For example, if the voltage is 5 volts, enter 5 in this box.
  3. When you click the “Calculate” button, the calculator performs a simple calculation using your provided information.
  4. The result is shown in the box below, telling you how much charge (in mAh) your device’s battery can hold. For example, if it shows 6000 mAh, your device’s battery can hold 6000 milliamp-hours of charge at the given voltage.

It’s a handy tool for understanding the capacity and energy needs of your electronic devices and batteries. So, if you need to compare different devices or plan how long your device can run on a single charge, this calculator can help you!

The formula for Wh to mah conversion

To convert watt-hours (Wh) to milliamp-hours (mAh), you can use the following formula:

Q(mAh) = 1000 × E(Wh) / V(V)

Where: Q(mAh) = Charge in milliamp-hours (mAh) E(Wh) = Energy in watt-hours (Wh) V(V) = Voltage in volts (V)

The table on Wh to mah (Volt: 1)

Energy (Wh)Charge (mAh)

The Table on Wh to mah (different volts)

Energy (Wh)Voltage (V)Charge (mAh) at 3.7VCharge (mAh) at 5VCharge (mAh) at 12V

How many watt hours is 10000mah?

To convert 10000 milliamp-hours (mAh) to watt-hours (Wh) using a common voltage of 3.7 volts (typical voltage of lithium-ion batteries in many electronic devices), you can use the formula:

Energy (Wh) = Charge (mAh) × Voltage (V) / 1000

Given: Charge (mAh) = 10000 mAh Voltage (V) = 3.7 volts

Now, let’s calculate the energy (Wh):

Energy (Wh) = 10000 mAh × 3.7 V / 1000 = 37 Wh

So, 10000 milliamp-hours (mAh) is equivalent to 37 watt-hours (Wh) at a voltage of 3.7 volts.

What is a 100Wh power bank?

A 100Wh power bank refers to a portable device that can store and supply electrical energy to charge or power electronic devices like smartphones, tablets, laptops, cameras, etc. “Wh” stands for watt-hours, and it is a unit of energy, representing the total amount of electrical energy the power bank can store.

Here’s how to understand what a 100Wh power bank means:

  1. Energy Capacity: A 100Wh power bank has an energy capacity of 100 watt-hours. This means it can store up to 100 watt-hours of electrical energy.
  2. Watt-hours vs. Milliamp-hours: Power banks often provide the energy capacity in watt-hours, which is a larger unit. The capacity can be converted to milliamp-hours (mAh) using the voltage of the power bank.
  3. Example Conversion: If the power bank operates at a voltage of 5 volts (typical for many electronic devices), you can convert 100 watt-hours to milliamp-hours using the formula: Charge (mAh) = Energy (Wh) × 1000 / Voltage (V)Charge (mAh) = 100 Wh × 1000 / 5 V = 20,000 mAhSo, a 100Wh power bank at 5 volts has an equivalent capacity of 20,000 milliamp-hours (mAh).
  4. Charging Devices: The power bank can charge various devices with its 100Wh capacity (or 20,000 mAh at 5V). The actual number of charges you get will depend on the device’s battery size and efficiency.

How many watts is a 100AH battery?

To determine the number of watts in a battery, you need to consider the battery’s voltage (V) and its ampere-hour (AH) rating. The formula to calculate the wattage (W) of a battery is:

Watts (W) = Voltage (V) × Ampere-Hour (AH)

Given: AH (Ampere-Hour) = 100 AH

Since the voltage is not specified, I’ll provide you with examples using common voltage levels for batteries:

Example 1: 12-volt battery Watts (W) = 12 V × 100 AH = 1200 watts

For Example 2: 24-volt battery Watts (W) = 24 V × 100 AH = 2400 watts

Example 3: 48-volt battery Watts (W) = 48 V × 100 AH = 4800 watts

General Watts formulas

  1. Power (W) Formula: Power (W) = Voltage (V) × Current (I)
  2. Power (W) Formula using Resistance (R): Power (W) = Current (I)² × Resistance (R)
  3. The Power (W) Formula using Voltage (V) and Resistance (R): Power (W) = (Voltage (V)²) / Resistance (R)
  4. Power (W) Formula using Energy (E) and Time (t): Power (W) = Energy (E) / Time (t)
  5. The Power (W) Formula using Work (W) and Time (t): Power (W) = Work (W) / Time (t)
  6. Power (W) Formula using Force (F) and Velocity (v): Power (W) = Force (F) × Velocity (v)

General Milliamp formulas

  1. Milliamperes (mA) to Amperes (A) Conversion: Current (A) = Current (mA) / 1000
  2. Milliamperes (mA) to Amperes (A) Conversion for Power (P) and Voltage (V): Current (A) = Power (P) / Voltage (V) (If Power is given in Watts and Voltage is given in Volts, the current will be in Amperes)
  3. The Milliamperes (mA) to Coulombs (C) Conversion: Charge (Coulombs) = Current (mA) × Time (s) / 1000
  4. Milliamperes (mA) to Watt-hours (Wh) Conversion for Time (t) and Voltage (V): Energy (Wh) = Current (mA) × Voltage (V) × Time (h) / 1000
  5. Milliamperes (mA) to Joules (J) Conversion for Time (t): Energy (Joules) = Current (mA) × Voltage (V) × Time (s) / 1000
  6. The Milliamperes (mA) to Milliwatts (mW) Conversion for Voltage (V): Power (mW) = Current (mA) × Voltage (V)
  7. Milliamperes (mA) to Decibels (dBm) Conversion for Power (mW): Power (dBm) = 10 × log10(Power (mW))

Note: All the content on this page and the “Wh to mah calculator” are validated by Kenan BaltaciBethanie Stadler and Lee Roberts. They checked the algorithm, performance and accuracy of this calculator.