mA/h Power Consumption Calculator

Device Energy Usage Estimator

Input Fields

Current

I

mA

Current consumption in milliamps

Usage time

t

h

Device operation time in hours

Voltage (optional)

V

V

Voltage to calculate energy in mWh

CalculateReset

Calculate automaticallyIf enabled, the result will update automatically when you change any value.

Your Results

Total Consumption

Energy

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Milliamp-Hour Consumption Formula

$$\text{Consumption}_{\text{mAh}} = I_{\text{mA}} \cdot t_{\text{h}}$$

Where:

• $$I_{mA}$$ = current in milliamps (mA)
• $$t_{h}$$ = time in hours (h)
• $$Consumption_{mAh}$$ = energy consumed in milliamp-hours (mAh)

This formula provides a quick estimation of power consumption when current draw is constant over time.

mA/h Power Consumption – Calculation Example

Given:

• $$I$$ = 200 mA
• $$t$$ = 5 hours

Calculation:

1. $$\text{Consumption}_{mAh} = 200 \cdot 5 = 1000~\text{mAh}$$

The mA/h power consumption calculator is ideal for estimating how much charge a battery-powered device will consume over a given period. It is widely used in electronics, robotics, IoT, and mobile device development. Knowing the energy requirement helps optimize power supply design, battery sizing, and operation time prediction for portable systems.