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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.

Did you know?

A kilocalorie, often referred to simply as a “calorie” in the context of food and nutrition, is a unit of energy that equals 1,000 small calories. It’s the measure used to indicate how much energy food can provide to the body, crucial for fueling daily activities and maintaining body functions. Interestingly, the term kilocalorie has its roots in the Latin “calor” meaning heat, as it was originally tied to measuring energy in terms of heating.

In the world of nutrition, one kilocalorie is the amount of energy required to raise the temperature of one kilogram of water by one degree Celsius. Despite the prevalence of kilocalories in diet and health discussions, they were initially developed for scientific purposes during studies on thermodynamics in the 19th century. So, every time you check the calorie content on a food label, you’re engaging with a concept that has been bridging chemistry, physics, and nutrition for centuries!

> Calories to Kilocalories Conversion Table

Calories Kilocalories
0 cal 0 kcal
10 cal 0.01 kcal
20 cal 0.02 kcal
30 cal 0.03 kcal
40 cal 0.04 kcal
50 cal 0.05 kcal
60 cal 0.06 kcal
70 cal 0.07 kcal
80 cal 0.08 kcal
90 cal 0.09 kcal
100 cal 0.1 kcal
110 cal 0.11 kcal
120 cal 0.12 kcal
130 cal 0.13 kcal
140 cal 0.14 kcal
150 cal 0.15 kcal
160 cal 0.16 kcal
170 cal 0.17 kcal
180 cal 0.18 kcal
190 cal 0.19 kcal
200 cal 0.2 kcal
210 cal 0.21 kcal
220 cal 0.22 kcal
230 cal 0.23 kcal
240 cal 0.24 kcal
250 cal 0.25 kcal
260 cal 0.26 kcal
270 cal 0.27 kcal
280 cal 0.28 kcal
290 cal 0.29 kcal
300 cal 0.3 kcal
310 cal 0.31 kcal
320 cal 0.32 kcal
330 cal 0.33 kcal
340 cal 0.34 kcal
350 cal 0.35 kcal
360 cal 0.36 kcal
370 cal 0.37 kcal
380 cal 0.38 kcal
390 cal 0.39 kcal
400 cal 0.4 kcal
410 cal 0.41 kcal
420 cal 0.42 kcal
430 cal 0.43 kcal
440 cal 0.44 kcal
450 cal 0.45 kcal
460 cal 0.46 kcal
470 cal 0.47 kcal
480 cal 0.48 kcal
490 cal 0.49 kcal
500 cal 0.5 kcal
510 cal 0.51 kcal
520 cal 0.52 kcal
530 cal 0.53 kcal
540 cal 0.54 kcal
550 cal 0.55 kcal
560 cal 0.56 kcal
570 cal 0.57 kcal
580 cal 0.58 kcal
590 cal 0.59 kcal
600 cal 0.6 kcal
610 cal 0.61 kcal
620 cal 0.62 kcal
630 cal 0.63 kcal
640 cal 0.64 kcal
650 cal 0.65 kcal
660 cal 0.66 kcal
670 cal 0.67 kcal
680 cal 0.68 kcal
690 cal 0.69 kcal
700 cal 0.7 kcal
710 cal 0.71 kcal
720 cal 0.72 kcal
730 cal 0.73 kcal
740 cal 0.74 kcal
750 cal 0.75 kcal
760 cal 0.76 kcal
770 cal 0.77 kcal
780 cal 0.78 kcal
790 cal 0.79 kcal
800 cal 0.8 kcal
810 cal 0.81 kcal
820 cal 0.82 kcal
830 cal 0.83 kcal
840 cal 0.84 kcal
850 cal 0.85 kcal
860 cal 0.86 kcal
870 cal 0.87 kcal
880 cal 0.88 kcal
890 cal 0.89 kcal
900 cal 0.9 kcal
910 cal 0.91 kcal
920 cal 0.92 kcal
930 cal 0.93 kcal
940 cal 0.94 kcal
950 cal 0.95 kcal
960 cal 0.96 kcal
970 cal 0.97 kcal
980 cal 0.98 kcal
990 cal 0.99 kcal
1000 cal 1 kcal