Elecal — Electric Calculator

A free tool for calculating voltage, current, power, energy costs, and EV charging times. Supports 190+ countries with local electricity rates.

Calculators included

• Ohm's Law — solve for Voltage (V), Current (A), or Resistance (Ω)
• Power — calculate Watts from any two of V, A, or Ω
• Energy Cost — find out how much an appliance costs to run per day/month/year
• EV Charging — estimate charge time and cost for electric vehicles
• 3-Phase Power — calculate three-phase electrical power (industrial/commercial)

How to use

Select your country to automatically load local electricity tariffs. Choose a calculator tab, enter the values you know, and Elecal instantly computes the missing value. All calculations update in real time — no submit button needed.

Frequently asked questions

Is Elecal free?

Yes, completely free with no sign-up required.

How accurate are the electricity rates?

Rates are sourced from public utility data and updated periodically. Use them as a guide — check your electricity bill for your exact tariff.

Does it work offline?

Yes. Elecal is a Progressive Web App (PWA) — install it from your browser and it works without an internet connection.