Energy Converter — Joules, Calories, kWh, BTU & More
Convert between joules, calories, kilowatt-hours, BTUs, electronvolts, and more. Free online energy unit converter for physics, nutrition, and engineering.
✓ Formula verified: January 2026
Energy Converter
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Result (j → kj)
1 J = 0.001 kJ
Formula
1 × (1 ÷ 1000) = 0.001
What if your value to convert changes? 0 → 0 J = 0 kJ · 1 → 1 J = 0.001 kJ · 2 → 2 J = 0.002 kJ
Scenario Comparison
Conservative (5%)
$16,470.09
$6,470.09 interest
Your scenario (7%)
$20,096.61
$10,096.61 interest
Aggressive (10%)
$27,070.41
$17,070.41 interest
High-risk (14%)
$40,224.71
$30,224.71 interest
Best return
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Energy Conversion
Source
1 J
Target
0.001 kJ
1
J
0
kJ
1 × (1 ÷ 1000) = 0.001
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