Joule (J)
Convert Joule to Other Units
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About the Joule
Unit Details
Quick Conversions
Reference Chart
Joule Reference Chart - Energy Conversions
Interactive conversion chart showing energy unit relationships. Compare 8 common units with precise calculations.
| Unit | Symbol | Equivalent to 1 aJ |
|---|---|---|
| AttojouleBase Unit | aJ | 1 |
| Btu (International) | Btu | 1.055E21 |
| Btu (Thermochemical) | Btu | 1.054E21 |
| Calorie (International) | cal | 4.187E18 |
| Calorie (Nutritional) | cal | 4.187E21 |
| Calorie (Thermochemical) | cal | 4.184E18 |
| Dyne-Centimeter | dyn cm | 1E11 |
| Electron Volt | eV | 0.16021 |
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Conversion Accuracy
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Comparison Table
Joule Comparison Table
Compare Joule values with 6 other energy units. Quick reference for common conversion values.
| Joule (J) | Attojoule (aJ) | Btu (International) (Btu) | Btu (Thermochemical) (Btu) | Calorie (International) (cal) | Calorie (Nutritional) (cal) | Calorie (Thermochemical) (cal) |
|---|---|---|---|---|---|---|
| 1 | 1E18 | 9.478E-4 | 9.485E-4 | 0.238846 | 2.388E-4 | 0.239006 |
| 5 | 5E18 | 0.004739 | 0.004742 | 1.194229 | 0.001194 | 1.195029 |
| 10 | 1E19 | 0.009478 | 0.009485 | 2.388459 | 0.002388 | 2.390057 |
| 25 | 2.5E19 | 0.023695 | 0.023711 | 5.971147 | 0.005971 | 5.975143 |
| 50 | 5E19 | 0.047391 | 0.047423 | 11.942295 | 0.011942 | 11.950287 |
| 100 | 1E20 | 0.094782 | 0.094845 | 23.88459 | 0.023885 | 23.900574 |
How to Use This Table
Find the value in Joule in the first column, then read across to see the equivalent values in other energy units.
Precision Note
All conversions are calculated using precise conversion factors with locale-appropriate number formatting for optimal readability.
About the Joule
The Joule (J) is a unit of energy measurement. Use our converter above to convert Joule to any other energy unit instantly