This power calculator finds power in watts using common GCSE physics formulas.

Use P = E ÷ t for energy transfer and time questions.

Use P = I × V for electrical current and voltage questions.

Canonical folder: /power-calculator/

Choose P = E/t for energy and time, or P = I×V for electrical power.

Enter the two known values in the Page 1 calculator boxes.

Press SOLVE to show the formula, substitution and answer in watts.

Use EXAMPLE to restore the sample values, or CLEAR to reset the tool.

Use joules with seconds when using P = E ÷ t.

Use amps with volts when using P = I × V.

The answer is shown in watts when the input units are consistent.

If time is given in minutes, convert it to seconds before calculating power.

Students use this page for GCSE power, energy transfer, circuits and electricity revision.

Teachers and tutors can use it to show formula substitution and unit checking.

It helps with appliances, motors, lamps, circuits and work-rate questions.

The calculator starts on Page 1 so the input tool is always quick to reach.

People may search for power calculator, watts calculator, electrical power calculator or P equals E over t calculator.

Other searches include P equals IV calculator, joules seconds watts calculator, and amps volts watts calculator.

This page supports those searches with a working calculator, formula help and readable internal pages.

GCSE users may search for physics power calculator, GCSE power formula calculator or power with working calculator.

Homework searches may ask how to calculate watts from joules and seconds.

Electrical homework may ask how to calculate power from current and voltage.

The working panel shows the formula, substituted values and final rounded result.

What is power? Power is the rate of energy transfer.

What unit is power? Power is measured in watts, written W.

What is 1 watt? 1 watt means 1 joule per second.

When use P = IV? Use it for electrical current and voltage questions.

Why is my answer wrong? Check that time is in seconds.

Can time be zero? No. Dividing energy by zero gives no valid power result.

Can I use decimals? Yes. Decimal energy, time, current and voltage values are supported.

Does rounding affect working? Rounding is applied only to the final displayed answer.

Power connects to energy, work done, time, current, voltage, resistance and electrical circuits.

Related searches include current voltage power calculator, energy divided by time calculator and science power formula tool.

Use the physics calculator hub for nearby Teletext-Tools pages on energy, Ohm’s law and wave speed.

https://teletext-tools.com/power-calculator/

This page is designed for users who need a fast watts answer, a visible formula and clear working.

It covers calculation intent, revision intent, homework intent and electrical power intent.

The support text is split across full-size reading panels instead of compressed SEO boxes.

Use P = E ÷ t to compare how quickly energy is transferred.

Use P = I × V to calculate electrical power in circuits and appliance questions.

For exam answers, write the formula, substitute the values, calculate, then add watts.

NEXT loops back to Page 1 so you can calculate another power value.

Screen 1 keeps the main controls visible. Screen 2 keeps the answer and working clear.

Use PREV and NEXT on every internal screen to move through the help pages safely.