Ohm's Law Calculator
Instantly calculate Voltage, Current, Resistance, or Power.
How to use Ohm's Law?
Ohm's Law is the foundation of electronics. It states that the current flowing through a conductor is directly proportional to the voltage applied across it. The formula is: V = I × R.
- V = Voltage in Volts (V)
- I = Current in Amperes (A)
- R = Resistance in Ohms (Ω)
- P = Power in Watts (W) (P = V × I)
Resistor Color Code
4-Band resistor visual decoder.
Capacitor Code
Convert codes like "104" or "473" to standard units.
Voltage Divider
LED Resistor Calculator
Find the perfect resistor for your LED to prevent burning out.
Why do LEDs need a resistor?
An LED (Light Emitting Diode) is a current-driven device. Without a resistor, an LED will draw as much current as possible until it destroys itself. The resistor limits this current to a safe level.
Formula used: R = (Vs - Vf) / I
555 Timer (Astable)
Calculate frequency for Astable mode.
PCB Trace Width
IPC-2221 Generic Standard (External Layers).
Series & Parallel Resistors
Enter 2 resistor values.
Battery Life
Frequency ↔ Period
About Electro-Station
Welcome to Electro-Station — your ultimate toolkit for electrical engineering calculations.
We created this platform to make complex electronics math accessible for everyone. This project is proudly developed in Ukraine 🇺🇦.
Why use our tools?
- Precision: Verified standard engineering formulas.
- Speed: Instant results without page reloads.
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