Battery Life Calculator
Estimate how long a battery will last based on its capacity and the device's consumption.
Enter Parameters
How Battery Life is Calculated
This calculator provides a simple estimate of a battery's life by dividing its capacity (in milliampere-hours) by the current consumption of the device (in milliamperes). This gives a theoretical runtime in hours. It's important to note that real-world battery life can be affected by factors like battery age, temperature, and discharge efficiency, so this calculation should be used as a guideline.
Formula: Battery Life (hours) = Battery Capacity (mAh) / Current Consumption (mA)
Related Tools
Ohm's Law Calculator
Calculate V, I, or R based on Ohm's Law.
Resistor Color Code Calculator
Find a resistor's value by its color bands.
Simple LED Resistor Calculator
Find the right resistor for your LED.
Battery Capacity Calculator
Determine battery capacity based on load and runtime.
Voltage Converter
Convert units of voltage.
Current Converter
Convert units of electrical current.
Frequency Converter
Convert units of frequency.
Charge Converter
Convert units of electrical charge.
Power Dissipation Calculator
Calculate power dissipation in resistor circuits.
RF Power Converter
Convert RF power between watts and decibels.
Thermal Resistance Calculator
Calculate thermal resistance for heat transfer.
Zener Diode Regulator Calculator
Calculate values for Zener diode circuits.
LM317 Resistor / Voltage Calculator
Calculate resistor/voltage for an LM317.
DC-DC Circuit Calculator
Calculate values for a DC-DC buck converter.
Power Supply Calculator
Estimate the wattage needed for your PC build.
Electric Load Calculator
Estimate your electrical load and consumption.
Power Calculator
Calculate power, voltage, current, or resistance.