The calorie, commonly associated with food energy, originally measured heat in physics. One calorie is the amount of heat needed to raise the temperature of 1 gram of water by 1 degree Celsius. Despite what food packaging might suggest, when we count calories, we are typically referring to kilocalories, which equals 1,000 of these small calories. This means that when you see a snack label stating it’s 100 calories, it’s actually 100 kilocalories, or 100,000 calories in scientific terms!

Interestingly, the calorie became a popular unit due to its early use in nutrition studies and its role in determining food’s energy content. This is crucial, as it helps in planning and maintaining balanced diets and understanding energy expenditure for health and fitness.

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The gigajoule (GJ) is a unit of energy equivalent to one billion joules. It offers a convenient metric for measuring substantial energy quantities and is frequently used in contexts like natural gas and electrical energy. For instance, one gigajoule can power an average household’s energy needs for about three days, depending on energy consumption habits. Interestingly, it’s also roughly equivalent to the energy contained in 26.8 gallons of gasoline, highlighting its significance in both domestic and industrial contexts.

Beyond its everyday applications, the gigajoule also plays a critical role in scientific fields. In the realm of seismology, for example, a moderate earthquake releases energy comparable to a few gigajoules, illustrating the vast power of natural phenomena. This demonstrates how understanding gigajoules can offer insights into both human technology and the forces of nature.

Calories

Gigajoules

0 cal

0 GJ

10 cal

4.184e-8 GJ

20 cal

8.368e-8 GJ

30 cal

1.2552e-7 GJ

40 cal

1.6736e-7 GJ

50 cal

2.09200e-7 GJ

60 cal

2.5104e-7 GJ

70 cal

2.9288e-7 GJ

80 cal

3.3472e-7 GJ

90 cal

3.7656e-7 GJ

100 cal

4.184e-7 GJ

110 cal

4.6024e-7 GJ

120 cal

5.0208e-7 GJ

130 cal

5.4392e-7 GJ

140 cal

5.8576e-7 GJ

150 cal

6.276e-7 GJ

160 cal

6.6944e-7 GJ

170 cal

7.1128e-7 GJ

180 cal

7.5312e-7 GJ

190 cal

7.9496e-7 GJ

200 cal

8.368e-7 GJ

210 cal

8.7864e-7 GJ

220 cal

9.2048e-7 GJ

230 cal

9.6232e-7 GJ

240 cal

1.00416e-6 GJ

250 cal

0.000001046 GJ

260 cal

1.08784e-6 GJ

270 cal

1.12968e-6 GJ

280 cal

1.17152e-6 GJ

290 cal

1.21336e-6 GJ

300 cal

1.2552e-6 GJ

310 cal

1.29704e-6 GJ

320 cal

1.33888e-6 GJ

330 cal

1.38072e-6 GJ

340 cal

1.42256e-6 GJ

350 cal

1.4644e-6 GJ

360 cal

1.50624e-6 GJ

370 cal

1.54808e-6 GJ

380 cal

1.58992e-6 GJ

390 cal

1.63176e-6 GJ

400 cal

1.6736e-6 GJ

410 cal

1.71544e-6 GJ

420 cal

1.75728e-6 GJ

430 cal

1.79912e-6 GJ

440 cal

1.84096e-6 GJ

450 cal

1.8828e-6 GJ

460 cal

1.92464e-6 GJ

470 cal

1.96648e-6 GJ

480 cal

2.00832e-6 GJ

490 cal

2.05016e-6 GJ

500 cal

0.000002092 GJ

510 cal

2.13384e-6 GJ

520 cal

2.17568e-6 GJ

530 cal

2.21752e-6 GJ

540 cal

2.25936e-6 GJ

550 cal

2.3012e-6 GJ

560 cal

2.34304e-6 GJ

570 cal

2.38488e-6 GJ

580 cal

2.42672e-6 GJ

590 cal

2.46856e-6 GJ

600 cal

2.5104e-6 GJ

610 cal

2.55224e-6 GJ

620 cal

2.59408e-6 GJ

630 cal

2.63592e-6 GJ

640 cal

2.67776e-6 GJ

650 cal

2.7196e-6 GJ

660 cal

2.76144e-6 GJ

670 cal

2.80328e-6 GJ

680 cal

2.84512e-6 GJ

690 cal

2.88696e-6 GJ

700 cal

2.9288e-6 GJ

710 cal

2.97064e-6 GJ

720 cal

3.01248e-6 GJ

730 cal

3.05432e-6 GJ

740 cal

3.09616e-6 GJ

750 cal

0.000003138 GJ

760 cal

3.17984e-6 GJ

770 cal

3.22168e-6 GJ

780 cal

3.26352e-6 GJ

790 cal

3.30536e-6 GJ

800 cal

3.3472e-6 GJ

810 cal

3.38904e-6 GJ

820 cal

3.43088e-6 GJ

830 cal

3.47272e-6 GJ

840 cal

3.51456e-6 GJ

850 cal

3.5564e-6 GJ

860 cal

3.59824e-6 GJ

870 cal

3.64008e-6 GJ

880 cal

3.68192e-6 GJ

890 cal

3.72376e-6 GJ

900 cal

3.7656e-6 GJ

910 cal

3.80744e-6 GJ

920 cal

3.84928e-6 GJ

930 cal

3.89112e-6 GJ

940 cal

3.93296e-6 GJ

950 cal

3.9748e-6 GJ

960 cal

4.01664e-6 GJ

970 cal

4.05848e-6 GJ

980 cal

4.10032e-6 GJ

990 cal

4.14216e-6 GJ

1000 cal

0.000004184 GJ

Conversion

Calories to Watt-seconds

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Calories to Watt-minutes

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Calories to Watt-hours

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Calories to Milliwatt-hours

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Calories to Kilowatt-hours

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Calories to Megawatt-hours

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Calories to Gigawatt-hours

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Calories to Joules

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Calories to Kilojoules

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Calories to Megajoules

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Calories to Kilocalories

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Calories to Gigajoules Conversion

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