← All tools
🇬🇧 EN
🇫🇷 FR
🇪🇸 ES
🇧🇷 PT
🇩🇪 DE
🔒 100% Local — No data sent
⚡ No signup needed
🛡️ Nothing stored
Ohm's Law Calculator
Enter any two values to calculate the other two instantly.
Voltage (V)
Current (A)
Resistance (Ω)
Power (W)
Enter any 2 of the 4 values above
Calculated values — Calculated from:
V+I
Voltage
24
V
Current
1
A
Resistance
24
Ω
Power
24
W
Key Formulas
V = I × R
I = V / R
R = V / I
P = V × I
P = I² × R
P = V² / R