Watt-Hour to Kilocalorie Converter
Convert Watt-Hour (Wh) to Kilocalorie (kcal) instantly. 1 Wh = 0.860421 kcal.
Energy Converter
27 units available
1 Wh = 0.860421 kcal
Formula:
kcal = Wh × 0.8604206501With your value: 1 Wh = 0.86042065 kcal
How big is that?
Everyday references on a logarithmic scale, all expressed in watt-hour so you can sanity-check the result.
Other Watt-Hour to Kilocalorie conversions
Watt-Hour to Kilocalorie Conversion Table
| Watt-Hour (Wh) | Kilocalorie (kcal) |
|---|---|
| 0.5 | 0.43021 |
| 1 | 0.860421 |
| 2 | 1.720841 |
| 5 | 4.302103 |
| 10 | 8.604207 |
| 15 | 12.90631 |
| 20 | 17.208413 |
| 25 | 21.510516 |
| 50 | 43.021033 |
| 100 | 86.042065 |
| 250 | 215.105163 |
| 500 | 430.210325 |
| 1000 | 860.42065 |
Kilocalorie to Watt-Hour Conversion Table
| Kilocalorie (kcal) | Watt-Hour (Wh) |
|---|---|
| 0.5 | 0.581111 |
| 1 | 1.162222 |
| 2 | 2.324444 |
| 5 | 5.811111 |
| 10 | 11.622222 |
| 15 | 17.433333 |
| 20 | 23.244444 |
| 25 | 29.055556 |
| 50 | 58.111111 |
| 100 | 116.222222 |
| 250 | 290.555556 |
| 500 | 581.111111 |
| 1000 | 1,162.222222 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Watt-Hour (Wh)
Energy
Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Kilocalorie (kcal)
Energy
Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Watt-Hour to Kilocalorie
To convert from Watt-Hour (Wh) to Kilocalorie (kcal), multiply the value by 0.8604206501.
Formula: kcal = Wh × 0.8604206501
Reverse: Wh = kcal × 1.1622222222
Step-by-Step Example
- Start with your value in Watt-Hour. For example: 5 Wh
- Multiply by the conversion factor: 5 x 0.8604206501
- The result is: 4.302103 kcal
About Watt-Hour
The watt-hour (Wh) is a unit of energy and work. One watt-hour equals 3600 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: energy calculations, engineering and science, education.
About Kilocalorie
The kilocalorie (food Calorie) equals 1,000 calories or 4,184 joules. It is the standard unit for food energy content.
Common uses: nutrition, diet, food labeling.
Frequently Asked Questions
How many Kilocalorie are in 1 Watt-Hour?
There are exactly 0.8604206501 Kilocalorie in 1 Watt-Hour. This means the conversion factor from Watt-Hour to Kilocalorie is 0.8604206501.
What is the formula to convert Watt-Hour to Kilocalorie?
The formula to convert Watt-Hour to Kilocalorie is: kcal = Wh × 0.8604206501. For example, to convert 10 Watt-Hour to Kilocalorie, you would multiply 10 by 0.8604206501.
What is a Watt-Hour?
The watt-hour (Wh) is a unit of energy and work. One watt-hour equals 3600 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What is a Kilocalorie?
The kilocalorie (food Calorie) equals 1,000 calories or 4,184 joules. It is the standard unit for food energy content.
What are the common uses of Watt-Hour?
The Watt-Hour is commonly used in energy calculations, engineering and science, education.
Related Energy Conversions
Cite this page
UnitConvertLab. (2026). Watt-Hour to Kilocalorie converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/watt_hour-to-kilocalorie