UnitCloud is a calculation aid. Standards, contracts, medical decisions, engineering approvals and official requirements need original sources.
Unit console
Convert units with formula, context and precision
UnitCloud is a local measurement lab for everyday work, engineering, IT, energy, mobility and design. Every conversion shows result, formula, base unit, rounding and the common mistake.
No match in this view. Use the direct conversions navigation or clear the search term.
Unit family
Energy
Food calories are kilocalories. Utility bills use kilowatt-hours. Both are energy units, but in different contexts.
| Unit | Symbol | Formula |
|---|---|---|
| Joule | J | base |
| Kilojoule | kJ | 1 kJ = 1000 J |
| Watt-hour | Wh | 1 Wh = 3600 J |
| Kilowatt-hour | kWh | 1 kWh = 3,600,000 J |
| Calorie | cal | 1 cal = 4.184 J |
| Kilocalorie | kcal | 1 kcal = 4184 J |
| British thermal unit | BTU | 1 BTU ≈ 1055.05585 J |
| Electronvolt | eV | 1 eV = 1.602176634e-19 J |
Food calories are kilocalories. Utility bills use kilowatt-hours. Both are energy units, but in different contexts.
Sources
Search and practice paths
Search and practice paths
FormulaTableExamplesCommon mistakeEveryday/engineeringExcel/CSVBatch converterPrint view
Factors come from the stored source family and are not derived from rounded display values.
UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.
Do not use as the sole basis for official, medical, safety-critical or contractual decisions.
Citation note: UnitCloud, conversion with formula, sources current as of May 2026. Energy. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.
Common questions
Which base unit does Energy use?
UnitCloud normalises this family through J. That keeps tables, direct conversions and batch output consistent.
What is the most common mistake for Energy?
Food calories are kilocalories. Utility bills use kilowatt-hours. Both are energy units, but in different contexts.
How does UnitCloud round?
UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.
Related conversions