LED Bulb Power at 12 V, 1 A
A 12 V LED drawing 1 A consumes 12 W — equivalent in brightness to a roughly 100 W incandescent bulb.
How to use this tool
- Enter known values, voltage v, current i, resistance r and power p in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your power p and the full breakdown beneath it.
Twelve-volt LED strips and bulbs running at 1 A use just 12 W while producing light comparable to much higher-wattage traditional bulbs.
Frequently asked questions
- How is this different from the Ohm's Law calculator?
- The Ohm's Law calculator solves V=IR for three variables. This tool adds the power equations (P=VI, P=I²R, P=V²/R) and lets you start from any two of the four quantities P, V, I, R.
- What are real-world examples?
- A 60 W light bulb on 120 V draws I = P/V = 0.5 A, with R = V/I = 240 Ω.