Watt-Hour (W h)
Convert Watt-Hour to Other Units
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About the Watt-Hour
Unit Details
Quick Conversions
Reference Chart
Watt-Hour 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
All conversions use official conversion factors and are calculated with maximum precision to ensure professional-grade accuracy.
Comparison Table
Watt-Hour Comparison Table
Compare Watt-Hour values with 6 other energy units. Quick reference for common conversion values.
| Watt-Hour (W h) | Attojoule (aJ) | Btu (International) (Btu) | Btu (Thermochemical) (Btu) | Calorie (International) (cal) | Calorie (Nutritional) (cal) | Calorie (Thermochemical) (cal) |
|---|---|---|---|---|---|---|
| 1 | 3.6E21 | 3.412141 | 3.414426 | 859.845228 | 0.859845 | 860.42065 |
| 5 | 1.8E22 | 17.060706 | 17.07213 | 4,299.226139 | 4.299226 | 4,302.10325 |
| 10 | 3.6E22 | 34.121412 | 34.144259 | 8,598.452279 | 8.598452 | 8,604.206501 |
| 25 | 9E22 | 85.303529 | 85.360649 | 21,496.130696 | 21.496131 | 21,510.516252 |
| 50 | 1.8E23 | 170.607058 | 170.721297 | 42,992.261393 | 42.992261 | 43,021.032505 |
| 100 | 3.6E23 | 341.214116 | 341.442595 | 85,984.522786 | 85.984523 | 86,042.06501 |
How to Use This Table
Find the value in Watt-Hour 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 Watt-Hour
The Watt-Hour (W h) is a unit of energy measurement. Use our converter above to convert Watt-Hour to any other energy unit instantly