Electrical Calculator
Ohm's Law, power calculations, and electrical unit conversions
Enter any two values to calculate the third
Calculate power, energy consumption, and cost
Calculate total resistance for series and parallel resistor configurations
// Ohm's Law
V = I × R. Voltage equals current times resistance. This is the fundamental relationship in electrical circuits. Know any two, calculate the third.
// Series vs Parallel
Series: R_total = R1 + R2 + ... (resistances add up). Parallel: 1/R_total = 1/R1 + 1/R2 + ... (total is always less than smallest).
// Power
P = V × I = I²R = V²/R. Power in watts tells you energy use per second. 1 kWh = 1000W running for 1 hour.
// How to Use Online Electrical Calculator
- Enter or paste your source data into the tool input.
- Click the primary action button to run Online Electrical Calculator.
- Review the output, then copy or export your result.
// FAQ: What does Online Electrical Calculator do?
Online Electrical Calculator helps you ohm's law, power calculations, and electrical unit conversions in your browser with instant results.
// FAQ: How do I use Online Electrical Calculator?
Paste or type your input, choose the needed action, and copy the generated output when the result is ready.
// FAQ: Is my data safe when using Online Electrical Calculator?
Yes. Processing runs in your browser session for this page, so your content is not uploaded by this tool workflow.
// FAQ: Can I use Online Electrical Calculator on mobile devices?
Yes. Online Electrical Calculator works on modern mobile browsers, so you can run it from phones and tablets.