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
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 = 10000mAhAnother Example
Given:
- Current Draw = 1.5A
- Usage Time = 3 hours
Required Battery Capacity:
mAh = 1.5A × 3 hours × 1000 = 4500mAhFAQs
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.
