Calculators
Electrical calculations do not always need to be complicated. When you have the right formula and the correct values, many common calculations can be done quickly.
At ElectroCalc, we have brought together a collection of practical electrical calculators for everyday use. Whether you are checking a current value, calculating power, working with Ohm’s Law, or converting between electrical units, these tools are designed to make the calculation easier.
Find the Right Calculator
Different electrical calculations require different formulas. Instead of searching for a formula every time, you can choose the calculator that matches the information you already have.
Voltage Calculator
Need to find voltage from known electrical values? The Voltage Calculator helps you calculate voltage for common DC, single-phase AC, and three-phase AC calculations.
Use it when: you know values such as current, resistance, power, or power factor and need to determine voltage.
Current Calculator
The Current Calculator helps you determine electrical current from known values such as voltage, resistance, power, and power factor.
It can be useful when checking how much current a load may draw under a particular electrical condition.
Power Calculator
Electrical power is commonly expressed in watts or kilowatts. The Power Calculator helps you calculate power from the electrical values available to you.
It is useful for understanding the relationship between voltage, current, power factor, and electrical load.
Ohm’s Law Calculator
Ohm’s Law is one of the basic relationships used in electrical calculations.
The calculator makes it easier to work with voltage, current, and resistance without rearranging the formula manually. It is particularly useful for students and anyone learning basic electrical concepts.
Cable Size Calculator
Choosing a cable involves more than simply looking at the load current. Cable length, installation method, voltage drop, temperature, insulation, and applicable standards can all affect the final selection.
The Cable Size Calculator can help you make an initial calculation based on the information provided. For actual installations, the result should always be checked against the applicable electrical standards and installation conditions.
kW to Amps Calculator
If you know the power of an electrical load in kilowatts but need to estimate the current, the kW to Amps Calculator can help.
The calculation can differ depending on whether the system is single-phase or three-phase and whether power factor is involved.
Amps to kW Calculator
Sometimes you know the current but want to estimate the corresponding electrical power. The Amps to kW Calculator works in the opposite direction and helps convert current into power using the appropriate electrical values.
Electrical Unit Converter
Electrical work involves different units, and converting them manually can sometimes be inconvenient.
Our Unit Converter helps with common electrical unit conversions so you can spend less time doing simple conversions and more time working with the actual problem.
More Than Just a Number
A calculator is most useful when you understand what the result means.
For this reason, many of our calculator pages include the relevant formula, an explanation of the calculation, and examples where appropriate. This makes ElectroCalc useful not only for getting an answer but also for learning how the calculation works.
Built for Everyday Electrical Work
These calculators can be useful in different situations:
- Checking calculations while studying electrical engineering
- Quickly verifying a calculation during electrical work
- Estimating values before detailed design
- Understanding common electrical formulas
- Checking results when working with electrical loads
- Learning the relationship between voltage, current, resistance, and power
The calculators are intended as practical calculation tools, not as a replacement for professional electrical design or safety checks.
Choose a Calculator and Get Started
Select the calculator that matches your calculation and enter the values you know. The result can then be used as a quick reference or as part of a more detailed electrical calculation.
If you want to understand the theory behind the numbers, you can also explore our Electrical Guides, where common electrical concepts and formulas are explained in simple language.
ElectroCalc — simple tools for everyday electrical calculations.