Gigajoule to Calorie Converter
Energy · unit-converter
Convert Gigajoule to Calorie with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Gigajoule (gj)
To: Calorie (cal)
About Gigajoule
One gigajoule is 1,000,000,000 J. Utility-scale and fuel-system reporting commonly use GJ.
About Calorie
The small calorie (cal) is 4.184 J in this converter (thermochemical). Do not confuse with the dietary kilocalorie (kcal).
How to convert gigajoules to calories
1 gigajoule is equal to 2.39005736e+8 calorie when both are expressed in joule-equivalents:
1 gj = (1,000,000,000 J ÷ 4.184 J) cal = 2.39005736e+8 cal
Each gigajoule is defined as 1,000,000,000 J and each calorie as 4.184 J in this tool, so one gj equals 1,000,000,000 ÷ 4.184 cal = 2.39005736e+8 cal.
Let d(gj) be the numeric amount in Gigajoule (gj), and d(cal) the amount in Calorie (cal). Then:
d(cal) = d(gj) × (1,000,000,000 / 4.184)
Equivalently, divide by how many gj fit into one cal (joules per cal divided by joules per gj):
d(cal) = d(gj) ÷ 4.18400000e-9
Or: calorie = gigajoule ÷ 4.18400000e-9
Examples
Example #1: Convert 1 gj to calorie
1 gj = 1 gj × (1,000,000,000/4.184) cal = 239005736.1380000114 cal
1 gj = 1 gj ÷ 4.18400000e-9 = 239005736.1380000114 cal
Example #2: Convert 10 gj to calorie
10 gj = 10 gj × (1,000,000,000/4.184) cal = 2390057361.3800001144 cal
10 gj = 10 gj ÷ 4.18400000e-9 = 2390057361.3800001144 cal
Summary
To convert Gigajoule to Calorie, multiply the value in gj by the ratio of joules per gj divided by joules per cal. Equivalently: value_cal = value_gj × (1000000000 / 4.184). Numerically, 1 gj equals 239005736.1376673 cal.
Relationship context
You are converting between SI energy (joules) (Gigajoules) and food / nutrition energy (calories) (Calories). All values are mapped through joules first. The numeric factor is 2.390057e+8.
Conversion tables
| Gigajoule (gj) | Calorie (cal) |
|---|---|
| 0.1 | 23,900,573.6138000004 |
| 1 | 239,005,736.1380000114 |
| 2 | 478,011,472.2749999762 |
| 3 | 717,017,208.4129999876 |
| 4 | 956,022,944.550999999 |
| 5 | 1,195,028,680.6900000572 |
| 6 | 1,434,034,416.8299999237 |
| 7 | 1,673,040,152.9600000381 |
| 8 | 1,912,045,889.0999999046 |
| 9 | 2,151,051,625.2399997711 |
| Gigajoule (gj) | Calorie (cal) |
|---|---|
| 10 | 2,390,057,361.3800001144 |
| 20 | 4,780,114,722.75 |
| 30 | 7,170,172,084.1300001144 |
| 40 | 9,560,229,445.5100002289 |
| 50 | 11,950,286,806.8999996185 |
| 60 | 14,340,344,168.2999992371 |
| 70 | 16,730,401,529.6000003815 |
| 80 | 19,120,458,891 |
| 90 | 21,510,516,252.4000015259 |
| 100 | 23,900,573,613.7999992371 |