Milliampere Hour (mAh) to Kilowatt Hour (kWh) Calculator

Convert battery capacity from Milliampere Hours (mAh) to Kilowatt Hours (kWh). Enter your battery specifications to calculate the energy capacity in kWh.

Battery Specifications

How to Use this mAh to kWh Calculator?

To convert battery capacity from Milliampere Hours (mAh) to Kilowatt Hours (kWh), you'll need:

  • Battery Capacity (mAh): The milliampere-hour rating found on your battery specifications
  • Battery Voltage (V): The nominal voltage of your battery
  • Efficiency Factor: Accounts for energy losses in the battery system:
    • 85%: Typical real-world conditions
    • 90%: Good operating conditions
    • 95%: Optimal conditions
    • 100%: Theoretical maximum (not recommended for calculations)

Understanding Energy Conversion

The conversion from mAh to kWh involves several steps:

  • Basic Formula: kWh = (mAh × V) ÷ (1,000,000)
  • With Efficiency: Actual kWh = Basic calculation × Efficiency factor
  • Common Conversions:
    • 1000 mAh = 1 Ah (Ampere Hour)
    • 1 kWh = 1000 Wh (Watt Hours)
    • Wh = (mAh × V) ÷ 1000

Common Battery Applications

Different devices require different battery capacities:

  • Small Devices (0.001 - 0.02 kWh):
    • Smartphones: 3000-4500 mAh
    • Tablets: 5000-8000 mAh
    • Laptops: 4000-6000 mAh
  • Medium Applications (0.02 - 1 kWh):
    • E-bikes: 10000-20000 mAh
    • Portable power stations
    • Small solar storage
  • Large Systems (1+ kWh):
    • Electric vehicles: 40-100 kWh
    • Home energy storage
    • Industrial applications

Frequently Asked Questions (FAQ)

General Questions

What is a Milliampere Hour (mAh)?

A milliampere hour is a unit of electrical charge:

  • 1 mAh = 0.001 Ampere Hours
  • Commonly used for small battery ratings
  • Represents current flow over time
  • Higher mAh = longer runtime
Why convert to kWh?

Converting to kWh is useful for:

  • Comparing different battery systems
  • Energy cost calculations
  • System design and sizing
  • Power consumption analysis
How accurate is the conversion?

Conversion accuracy depends on:

  • Battery chemistry
  • Operating conditions
  • Discharge pattern
  • Temperature effects
  • Battery age and health

Technical Questions

Why does voltage matter?

Voltage is crucial because:

  • Determines power output
  • Affects energy capacity
  • Influences system compatibility
  • Required for Wh calculation
How do I find my battery's specifications?

Look for specifications:

  • On the battery label
  • In device documentation
  • Manufacturer's website
  • Technical data sheets
What affects actual energy capacity?

Energy capacity is influenced by:

  • Temperature
  • Discharge rate
  • Battery age
  • Usage patterns
  • Storage conditions