Energy Unit J to kJ Converter Calculator

Accurately translate joules into kilojoules for science engineering and study. Enter values choose rounding and copy results instantly. Handle single inputs or paste lists for batch conversion with clear steps history tooltips keyboard shortcuts and shareable links. Works offline after load supports accessibility provides unit notes saves settings enables dark mode offers clean layout

Convert J → kJ

Decimal places
Tip: Use scientific notation like 1e6 for one million.

Example:

2500
15000
3.4e6

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Formula: kJ = J ÷ 1000

One kilojoule equals one thousand joules. This tool divides input joules by 1000, then applies your chosen precision.

FAQs

1) What is a joule and what is a kilojoule?

A joule is a unit of energy in the SI system. A kilojoule equals one thousand joules and is commonly used for nutrition and engineering values.

2) How do I convert J to kJ?

Divide the value in joules by 1000. For example, 2500 J ÷ 1000 = 2.5 kJ.

3) Can I paste a list for batch conversion?

Yes. Use the Batch tab and paste values separated by new lines, spaces, commas, or semicolons.

4) What is the difference between decimals and significant figures?

Decimal places fix the number of digits after the point, while significant figures keep a fixed count of meaningful digits across the whole number.

5) Does the tool support scientific notation?

Yes. Inputs like 3.2e6 are accepted and converted correctly.

6) How can I export results?

After converting, click Export CSV to download the latest results as a CSV file.

7) How do I share my configuration?

Use the Share button to copy a URL that encodes your current inputs and settings.

Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.