18 Kilocalorie to Joule
Quick answer
18 Kilocalorie (kcal) equals
75,312 J
To convert 18 Kilocalories to Joules, multiply by 4,184. Therefore, 18 Kilocalorie (kcal) equals 75,312 Joule (J).
Formula: J = kcal × 4,184. Calculation: 18 × 4,184 = 75,312 J.
Convert Kilocalorie (kcal) to Joule (J) online with our free unit converter. In energy, 1 kcal = 4,184 J. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Kilocalorie to Joule
- Step 1 — start with the formula. J = kcal × 4,184
- Step 2 — substitute your figure. 18 kcal × 4,184
- Step 3 — read the result. 18 kcal = 75,312 J
- Step 4 — check it in reverse. kcal = J × 0.0002390057 returns Invalid kcal, which matches the figure you started with.
Energy Converter
27 units available
18 kcal = 75,312 J
Formula:
J = kcal × 4,184With your value: 18 kcal = 75,312 J
How big is that?
Everyday references on a logarithmic scale, all expressed in kilocalorie so you can sanity-check the result.
Other Kilocalorie to Joule conversions
Kilocalorie to Joule Conversion Table
| Kilocalorie (kcal) | Joule (J) |
|---|---|
| 0.5 | 2,092 |
| 1 | 4,184 |
| 2 | 8,368 |
| 5 | 20,920 |
| 10 | 41,840 |
| 15 | 62,760 |
| 20 | 83,680 |
| 25 | 104,600 |
| 50 | 209,200 |
| 100 | 418,400 |
| 250 | 1,046,000 |
| 500 | 2,092,000 |
| 1000 | 4,184,000 |
Joule to Kilocalorie Conversion Table
| Joule (J) | Kilocalorie (kcal) |
|---|---|
| 0.5 | 0.00012 |
| 1 | 0.000239 |
| 2 | 0.000478 |
| 5 | 0.001195 |
| 10 | 0.00239 |
| 15 | 0.003585 |
| 20 | 0.00478 |
| 25 | 0.005975 |
| 50 | 0.01195 |
| 100 | 0.023901 |
| 250 | 0.059751 |
| 500 | 0.119503 |
| 1000 | 0.239006 |
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.
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
Joule (J)
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 Kilocalorie to Joule
To convert from Kilocalorie (kcal) to Joule (J), multiply the value by 4,184.
Formula: J = kcal × 4,184
Reverse: kcal = J × 0.0002390057
Step-by-Step Example
- Start with your value in Kilocalorie. For example: 5 kcal
- Multiply by the conversion factor: 5 x 4,184
- The result is: 20,920 J
Kilocalorie and Joule Relationship
This calculation facilitates standardized conversion between recognized units of energy. Since 1 Kilocalorie equals approximately 4,184 Joules, the Kilocalorie represents a larger unit interval than the Joule. Understanding the relationship between Kilocalorie and Joule is essential for accurate calculations in physics, engineering, commerce, and daily applications.
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 of Kilocalorie: nutrition, diet, food labeling.
About Joule
The joule is the SI unit of energy. One joule equals the work done when a force of one newton moves an object one meter.
Common uses of Joule: physics, electrical engineering, chemistry.
Frequently Asked Questions
- What is 18 Kilocalorie in Joule?
- 18 Kilocalorie equals 75,312 Joule.
- How many Joules are in 1 Kilocalorie?
- There are exactly 4,184 Joules in 1 Kilocalorie. This means the conversion factor from Kilocalorie to Joule is 4,184.
- What is the formula to convert Kilocalorie to Joule?
- The formula to convert Kilocalorie to Joule is: J = kcal × 4,184. For example, to convert 10 Kilocalories to Joules, you would multiply 10 by 4,184.
- 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 is a Joule?
- The joule is the SI unit of energy. One joule equals the work done when a force of one newton moves an object one meter.
- What are the common uses of Kilocalorie?
- The Kilocalorie is commonly used in nutrition, diet, food labeling.
Related Energy Conversions
Cite this page
UnitConvertLab. (2026). 18 Kilocalorie to Joule. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/18-kilocalorie-to-joule