J to kJ Converter

Convert Joules to Kilojoules instantly

Formula:

kJ = J ÷ 1000

1 kilojoule = 1000 joules

🔗 Related Energy Converters

kJ → kcal kcal → kJ kcal → cal cal → kcal kJ → J cal → J J → cal ft-lb → Nm Nm → ft-lb All Converters

J to kJ (Joules → Kilojoules)

1. Core Idea

kJ is a scaled SI unit: 1 kJ = 1000 J. You just divide by 1000 to shrink large joule values.

2. Formula

kJ = J ÷ 1000

J = kJ × 1000

Move decimal 3 places left (J → kJ).

3. Quick Values

  • 500 J → 0.500 kJ
  • 900 J → 0.900 kJ
  • 1,000 J → 1.000 kJ
  • 2,500 J → 2.500 kJ
  • 5,000 J → 5.000 kJ
  • 20,000 J → 20.00 kJ
  • 75,000 J → 75.00 kJ
  • 1,000,000 J → 1000 kJ

4. 3-Step Example

Convert 48,600 J to kJ

  1. Formula: kJ = J ÷ 1000
  2. Insert: 48,600 ÷ 1000
  3. = 48.6 kJ

5. Where It’s Used

Physics experiments, engine output, nutrition (paired with kcal), batteries, heat and electrical energy reports.

6. Accuracy & Tips

  • Exact metric scaling—no approximation issues.
  • Keep significant figures from original joules.
  • For MJ: divide J by 1,000,000.
  • Group large numbers with commas for readability.

7. More Examples

JkJ
7500.750
12,30012.30
250,000250.0
3,600,0003600

8. FAQ

Why use kJ instead of J?

Keeps numbers shorter; many energies are in thousands of joules.

How to get MJ?

MJ = J ÷ 1,000,000 (or kJ ÷ 1000).