Instant voltage, current, resistance, and power calculations.
V
Electrical potential difference
A
Flow of electric charge
ฮฉ
Opposition to current flow
W
Rate of energy transfer
Common Circuit Examples:
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Calculation Results
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Voltage
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Volts
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Current
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Amps
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Resistance
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Ohms
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Power
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Watts
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Voltage (V)
V = I ร R
Voltage = Current ร Resistance
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Current (I)
I = V รท R
Current = Voltage รท Resistance
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Resistance (R)
R = V รท I
Resistance = Voltage รท Current
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Power (P)
P = V ร I
Power = Voltage ร Current
โ ๏ธ Educational Use Only: This calculator provides theoretical values.
Always consult a qualified electrician for real-world electrical work and follow local codes.