20 Calorie (th) to Gigajoule
Quick answer
20 Calorie (th) (cal) equals
8.368000e-8 GJ
To convert 20 Calorie (th)s to Gigajoules, multiply by 4.184000e-9. Therefore, 20 Calorie (th) (cal) equals 8.368000e-8 Gigajoule (GJ).
Formula: GJ = cal × 4.184000e-9. Calculation: 20 × 4.184000e-9 = 8.368000e-8 GJ.
Convert Calorie (th) (cal) to Gigajoule (GJ) online with our free unit converter. In energy, 1 cal = 4.184000e-9 GJ. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Calorie (th) to Gigajoule
- Step 1 — start with the formula. GJ = cal × 4.184000e-9
- Step 2 — substitute your figure. 20 cal × 4.184000e-9
- Step 3 — read the result. 20 cal = 8.368000e-8 GJ
- Step 4 — check it in reverse. cal = GJ × 239,005,736.1376673 returns 20 cal, which matches the figure you started with.
Energy Converter
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20 cal = 8.368000e-8 GJ
Formula:
GJ = cal × 4.184000e-9With your value: 20 cal = 8.368000e-8 GJ
How big is that?
Everyday references on a logarithmic scale, all expressed in calorie (th) so you can sanity-check the result.
Other Calorie (th) to Gigajoule conversions
Calorie (th) to Gigajoule Conversion Table
| Calorie (th) (cal) | Gigajoule (GJ) |
|---|---|
| 0.5 | 2.092000e-9 |
| 1 | 4.184000e-9 |
| 2 | 8.368000e-9 |
| 5 | 2.092000e-8 |
| 10 | 4.184000e-8 |
| 15 | 6.276000e-8 |
| 20 | 8.368000e-8 |
| 25 | 1.046000e-7 |
| 50 | 2.092000e-7 |
| 100 | 4.184000e-7 |
| 250 | 1.046000e-6 |
| 500 | 2.092000e-6 |
| 1000 | 4.184000e-6 |
Gigajoule to Calorie (th) Conversion Table
| Gigajoule (GJ) | Calorie (th) (cal) |
|---|---|
| 0.5 | 119,502,868.068834 |
| 1 | 239,005,736.137667 |
| 2 | 478,011,472.275335 |
| 5 | 1,195,028,680.688336 |
| 10 | 2,390,057,361.376673 |
| 15 | 3,585,086,042.06501 |
| 20 | 4,780,114,722.753345 |
| 25 | 5,975,143,403.441683 |
| 50 | 11,950,286,806.883366 |
| 100 | 23,900,573,613.76673 |
| 250 | 59,751,434,034.416824 |
| 500 | 119,502,868,068.83365 |
| 1000 | 239,005,736,137.6673 |
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.
Calorie (th) (cal)
Energy
The thermochemical calorie is exactly 4.184 J.
The International Table calorie (4.1868 J) and the 15 °C calorie differ slightly.
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
Gigajoule (GJ)
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 Calorie (th) to Gigajoule
To convert from Calorie (th) (cal) to Gigajoule (GJ), multiply the value by 4.184000e-9.
Formula: GJ = cal × 4.184000e-9
Reverse: cal = GJ × 239,005,736.1376673
Step-by-Step Example
- Start with your value in Calorie (th). For example: 5 cal
- Multiply by the conversion factor: 5 x 4.184000e-9
- The result is: 2.092000e-8 GJ
Calorie (th) and Gigajoule Relationship
This calculation facilitates standardized conversion between recognized units of energy. Since 1 Calorie (th) represents a fraction of a Gigajoule (1 Gigajoule ≈ 2.390e+8 Calorie (th)s), the Gigajoule is the larger measurement interval. Understanding the relationship between Calorie (th) and Gigajoule is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Calorie (th)
The thermochemical calorie equals 4.184 joules. Not to be confused with the food Calorie (kcal), which equals 1,000 calories.
Common uses of Calorie (th): chemistry, nutrition, heating.
About Gigajoule
The Gigajoule (symbol: GJ) is a recognized unit in the Metric (SI) measurement framework, utilized within energy applications for precision and standardized data representation.
Common uses of Gigajoule: energy calculations, engineering and science, education.
Frequently Asked Questions
- What is 20 Calorie (th) in Gigajoule?
- 20 Calorie (th) equals 8.368000e-8 Gigajoule.
- How many Gigajoules are in 1 Calorie (th)?
- There are exactly 4.184000e-9 Gigajoules in 1 Calorie (th). This means the conversion factor from Calorie (th) to Gigajoule is 4.184000e-9.
- What is the formula to convert Calorie (th) to Gigajoule?
- The formula to convert Calorie (th) to Gigajoule is: GJ = cal × 4.184000e-9. For example, to convert 10 Calorie (th)s to Gigajoules, you would multiply 10 by 4.184000e-9.
- What is a Calorie (th)?
- The thermochemical calorie equals 4.184 joules. Not to be confused with the food Calorie (kcal), which equals 1,000 calories.
- What is a Gigajoule?
- The Gigajoule (symbol: GJ) is a recognized unit in the Metric (SI) measurement framework, utilized within energy applications for precision and standardized data representation.
- What are the common uses of Calorie (th)?
- The Calorie (th) is commonly used in chemistry, nutrition, heating.
Related Energy Conversions
Cite this page
UnitConvertLab. (2026). 20 Calorie (th) to Gigajoule. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/20-calorie-to-gigajoule