Amps to milliampere-hours Calculator

Convert between Amps (A) and milliampere-hours (mAh) using time duration.

Amps to mAh Calculator: Battery Capacity Guide

Convert Amps (A) to milliamp hours (mAh) with our comprehensive calculator. Learn how to calculate battery capacity and runtime with practical examples.

Basic Electrical Units

Ampere (A)

A unit of electric current measuring the rate of electric charge flow. One ampere equals one coulomb per second.

Milliamp Hour (mAh)

A unit of electric charge that represents the capacity of a battery. One milliamp hour equals one-thousandth of an amp hour.

Conversion Formula

Amps to mAh Calculation

mAh = A × Hours × 1000

Where:

  • mAh = Capacity in milliamp hours
  • A = Current in Amps
  • Hours = Time duration in hours

Practical Examples

Battery Capacity Calculation

Given:

  • Current Draw = 2A
  • Usage Time = 5 hours

Required Battery Capacity:

mAh = 2A × 5 hours × 1000 = 10000mAh

Another Example

Given:

  • Current Draw = 1.5A
  • Usage Time = 3 hours

Required Battery Capacity:

mAh = 1.5A × 3 hours × 1000 = 4500mAh

FAQs

What is the difference between Amps and milliamp hours?

Amps measure the flow of electric current, while milliamp hours measure the total charge a battery can deliver over time.

How do I convert Amps to milliamp hours?

To convert Amps to milliamp hours, use the formula: mAh = A × Hours × 1000. You need to know the current in Amps and the time in hours.

Why is milliamp hour capacity important?

The milliamp hour capacity indicates how long a battery can power a device before needing a recharge. Higher mAh means longer usage time.

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