MarsTheLimit
Home
Tools
Articles
Projects
About
Contact
Sign In
Formula Calculator
Watt's Power Law
Leave one field empty — it will be solved automatically.
Power from voltage & current
P = VI
Power from voltage & resistance
P = V²/R
Power from current & resistance
P = I²R
Power with efficiency factor
P_out = η · VI
Energy over a time window
E = P · Δt
Power
W
Voltage
V
Current
A
Enter values to calculate
Fill 2 of 3 required fields
Clear all
I use cookies to improve your experience. You can accept all or reject non-essential cookies.
Reject
Accept