mA/h Power Consumption Calculator

Energy Usage Estimator in mAh

Input Fields

Current

I

mA

Current consumption of the device in milliamperes

Time

t

h

Duration the device is operating (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

Estimated Energy

Leave a Comment

How did this result make you feel?

0😀 Like 0💡 Helpful 0😕 Confused 0😞 Disappointed 0❌ Inaccurate

mAh Consumption Calculation Formula

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

Where:

• $$I_{mA}$$ = current draw in milliamps (mA)
• $$t_{h}$$ = time in hours (h)
• $$Consumption$$ = total energy used in milliamp-hours (mAh)

This formula estimates the total energy used over time by a device drawing constant current.

Calculation Example

Given:

• $$I$$ = 120 mA
• $$t$$ = 3 hours

Calculation:

1. $$Consumption = 120 \cdot 3 = 360~\text{mAh}$$

This calculator is useful when estimating battery drain or verifying how long a device will operate on a specific battery capacity. By entering the average current draw and operation time, it provides an accurate estimate of total energy usage in mAh. It supports design decisions for mobile devices, embedded systems, IoT hardware, and low-power electronics.