Electrical Calculations Made Simple
Instantly calculate Voltage, Current, Resistance, Power, and Battery Life without complex engineering calculators.
Share your calculation results with your team via a simple link.
Ω Ohm's Law Calculator
V = I × RSelect the value you want to calculate, then enter the other two.
Result
W Power (Watt) Calculator
P = V × I* Enter any two values to automatically calculate the rest.
🔋 Battery Life Calculator
Estimated Runtime
Approx. 0 Days
* Actual runtime may vary depending on battery condition, temperature, and discharge characteristics.
💡 LED Resistor Calculator
Required Resistor
Recommended: -
💡 Engineering Calculator Guide
Ohm's Law is a fundamental principle in electrical engineering describing the relationship between Voltage (V), Current (I), and Resistance (R). With this tool, you can instantly calculate the missing variable by entering the other two. Essential for circuit design, LED installation, and repair.
Power (Watt) Calculation is critical for estimating electricity costs or selecting power supply units (PSU). Calculate power consumption using voltage and current, and see the equivalent in Horsepower (HP).
Battery Life Calculator estimates how long a power bank, car battery, or camping power station will last with a specific load. It incorporates an efficiency factor to provide realistic runtime estimates rather than simple theoretical capacity division. Perfect for 18650 battery packs, smartphone power banks, and IoT devices.