Calculator Hub
Electric Calculators
This page groups practical electrical calculators and converters for quick estimates, fast checks, and simple engineering reference use.
Where to start
If you want a basic power estimate
Start with the Power Calculator.
If you are working with a three-phase load
Use the 3 Phase Power Calculator.
If you want a rough electricity bill estimate
Use the Electricity Cost Calculator.
If you want to estimate battery backup time
Use the Battery Runtime Calculator.
Power Estimation
Tools for estimating electrical power in single-phase and three-phase systems.
- Power CalculatorCalculate electrical power using voltage, current, and power factor.
- 3 Phase Power CalculatorEstimate three-phase electrical power from voltage, current, and power factor.
Cost and Runtime
Tools for estimating electricity cost and battery operating time.
- Electricity Cost CalculatorEstimate electricity usage and cost using power, time, and kWh rate.
- Battery Runtime CalculatorEstimate battery runtime using battery voltage, capacity, and load power.
Conversion Tools
Tools for converting between common power-related units.
- kW ↔ HP ConverterConvert kilowatts to horsepower and horsepower to kilowatts.
Important note
These calculators are intended for quick estimation and general reference. They are useful for fast checks, but they are not a replacement for detailed engineering review, code compliance, manufacturer documentation, or final design verification.