Power Function Calculator

Math

Calculate power (in watts) from energy (in joules) and time (in seconds). Power is the rate at which energy is transferred or used: P = E/t. Essential for physics, engineering, and energy calculations.

Formula

P = E/t
  • Power measures how quickly energy is used or transferred.
  • Formula: P = E / t (where P is in watts, E in joules, t in seconds)
  • 1 watt = 1 joule per second (J/s)
  • Power is used in physics, engineering, electrical systems, and energy efficiency calculations.

Example

Inputs
  • Energy (J): 100
  • Time (s): 10

100 joules delivered over 10 seconds = 10 watts of power

Frequently asked questions

What is power?
Power is the rate at which energy is transferred or used, measured in watts (W).
What does the formula mean?
P = E/t means power equals energy divided by time. Higher power means the same energy is used faster.
How is this used in practice?
Power calculations are used for electrical devices (appliances, lightbulbs), engines, motors, and energy efficiency analysis.