Ohm law calculator

Calculate current and power with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use current and power to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Voltage (V)
12
Resistance (Ω)
6
Current (A)
2
Power (W)
24

Try another scenario

Voltage (V)
13.200000000000001
Resistance (Ω)
6
Current (A)
2.2
Power (W)
29.04
Calculation method

Calculation method

Current (A)

a ÷ b

Power (W)

a × a ÷ b

Symbols and units
a
Voltage (V)
b
Resistance (Ω)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • DC Ohm’s law for an ohmic resistor; resistance is treated as constant.
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Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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