Energy Converter

Convert joules, calories, kilowatt-hours and BTU.

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How to use Energy Converter

Three quick steps — no sign-up needed

  1. Step 1

    Enter the value

    Type the number you want to convert.

  2. Step 2

    Select From and To units

    Pick Joule, kJ, cal, kcal, Wh, kWh, or BTU.

  3. Step 3

    Read the result

    Copy the converted value for homework, work, or travel planning.

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About Energy Converter

Energy Converter translates between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, and BTU. Students and technicians searching "joules to calories", "kWh to joules", or "BTU converter" need consistent energy unit maths for science and utility bills.

Enter a value, select From and To, and copy the result. Food "calories" on labels are usually kilocalories (kcal). Physics problems often use joules - do not mix label calories with small-c physics calories by accident.

Utility bills are typically in kWh. Converting kWh to joules is fine for science; cost still depends on your tariff per kWh.

Benefits of Energy Converter

Food and physics units cal/kcal and J/kJ together.
kWh support Bridge household energy and SI units.
BTU included Useful for HVAC-style references.
Fast homework checks Verify textbook conversions.

Frequently asked questions

Is a food calorie the same as a physics calorie?

Food labels usually show kilocalories (kcal), often written as Calories with a capital C.

How many joules in one kWh?

3.6 million joules (3.6 × 10^6 J).

What is BTU?

British Thermal Unit - still common in heating and cooling specs.

Can this calculate my electricity bill?

It converts energy units; multiply kWh by your rate for cost.

kcal to kJ?

1 kcal is approximately 4.184 kJ.