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Power Calculator — Solve for resistance 
Power Calculator — Solve for power
Power Calculator
Four-mode solver: enter any two of P, V, I, R to find the other two using P = VI, P = I²R and P = V²/R simultaneously. · in Power Supply
Four-mode solver: enter any two of P, V, I, R to find the other two using P = VI, P = I²R and P = V²/R simultaneously.
How to use
Four modes — solve for P, V, I or R.
What it's for
Calculate power (P=VI, P=I²R, P=V²/R).
You enter
- Any two quantities.
You get
- The rest, using whichever relation applies.