If you’ve ever been on-site, in a workshop, or even at your desk and wished you had a quick way to check electrical formulas without flipping through charts or doing manual math — our Electrical Calculator is made for you.
This free, online tool brings together all the essential electrical calculations in one simple interface, so you can focus on your work instead of the numbers.
Why Use an Electrical Calculator?
Whether you’re a professional electrician, an engineer, a student, or just working on a DIY project, electrical calculations are part of the job. Using our calculator means you can:
- Save time
- Avoid costly mistakes
- Quickly get accurate results
- Work confidently, anywhere, from any device
What Can It Calculate?
Our multi-function electrical calculator includes the most requested tools in the industry:
1. Ohm’s Law
Enter any two values (Voltage, Current, Resistance, Power) and instantly get the rest — no manual formulas needed.
2. Power Calculations
Supports both single-phase and three-phase systems, letting you calculate power (W/kW) or determine the required current for a given load.
3. Voltage Drop
Quickly check voltage drop for copper or aluminum cables, single or three-phase, to ensure compliance with standards.
4. Power Factor Correction
Calculate the required kVAr to improve your power factor, saving on energy costs and improving efficiency.
5. Energy & Cost
Estimate daily energy consumption (kWh) and cost based on your load and electricity rate.
6. Motor Full-Load Current
Find the full-load and starting current for single or three-phase motors, based on HP, efficiency, and power factor.
7. Transformer Sizing
Get the kVA rating on both primary and secondary sides for quick sizing and load checks.
Who Can Use It?
- Electricians – Fast checks during installations or troubleshooting
- Engineers – Quick reference during design
- Students – Learn by doing, with real-time results
- DIYers – Stay safe and accurate in home projects
Download It Now
Accessible Anywhere
The calculator works on desktop, tablet, or mobile, so you can use it:
- On the construction site
- In the workshop
- In the classroom
- At home