Physics Formulas: Motion, Force and Energy Explained
The core mechanics formulas every student needs — velocity, acceleration, the equations of motion, force, momentum, work, energy and power — explained plainly with worked examples.
Power Calculator (Physics)
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Power
50.000
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Power Calculator (Physics)
The Power Calculator (Physics) works out your power in an instant. Enter work or energy and time and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the work or energy.
- Enter the time.
- Read off your power — the calculator updates automatically, with no button to press.
Formula
The Power Calculator (Physics) uses the formula:
Power = Work or energy ÷ Time
Worked example
For example, with work or energy of 500 J and time of 10 s, the power is 50.000.
| Work or energy | 500 J |
|---|---|
| Time | 10 s |
| Power | 50.000 |
|---|
Results are estimates for educational use, not professional advice.
Frequently asked questions
Power is work or energy divided by time: P = W ÷ t. Doing 500 joules of work in 10 seconds is 50 watts.
A watt is one joule per second, the SI unit of power. It measures how fast energy is used or work is done.
This finds power from work and time. The power converter changes an existing power value between units like watts and horsepower.
Yes. Power also equals force times velocity. This tool uses the work-over-time definition.
Enter the work or energy. Enter the time. Read off your power — the calculator updates automatically, with no button to press.
Related guides
Power Calculator (Physics) Table: Power by Work or energy
Reference table of power for Power Calculator (Physics) across a range of work or energy values — exact, engine-computed figures you can read off at a glance.
How to Calculate Power Calculator (Physics): Formula, Steps & Examples
Learn how to calculate Power Calculator (Physics) — the formula explained step by step, with worked examples and a free calculator to check your answer.