B2B Agency Live AI
Ohm's Law and Power Calculator
Enter any two values below to calculate the other two instantly. Use the resistor helper to decode common color bands on the go.
Formula
V = I × R
Power
P = V × I
Calculator
Fill in any two fields. Leave the others blank and the calculator will work it out for you.
Voltage
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Current
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Resistance
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Power
—
Enter any two values to begin.
Resistor Color Code Helper
Pick the first two bands, multiplier and tolerance to estimate the resistor value.
Choose bands to see the value.
Tolerance will appear here.