Easily convert joules to gram calories and vice versa at examples.com. Our simple tool ensures quick and accurate energy conversions.

Conversion Factors:

  • Joules to Gram Calories: 1 calorie = 4.184 joules
  • Gram Calories to Joules: 1 joule = 1/4.184 calories

How to Convert Joules to Gram Calories:

To convert joules to gram calories, divide the number of joules by 4.184.

Calories=Joules/4.184

Example: Convert 2000 joules to gram calories.

Calories=2000/4.184=478.68 calories

How to Convert Gram Calories to Joules:

To convert gram calories to joules, multiply the number of calories by 4.184.

Joules=Calories×4.184

Example: Convert 300 calories to joules.

Joules=300×4.184=1255.2 joules

Joules to Gram Calories Conversion Table

Joules (j)Gram Calories (cal)
1 j0.239 cal
2 j0.478 cal
3 j0.717 cal
4 j0.956 cal
5 j1.195 cal
6 j1.434 cal
7 j1.673 cal
8 j1.912 cal
9 j2.151 cal
10 j2.390 cal
20 j4.780 cal
30 j7.170 cal
40 j9.560 cal
50 j11.950 cal
60 j14.340 cal
70 j16.730 cal
80 j19.120 cal
90 j21.510 cal
100 j23.900 cal

j to cal Conversion Chart

Gram Calories to Joules Conversion Table

Gram Calories (cal)Joules (j)
1 cal4.184 j
2 cal8.368 j
3 cal12.552 j
4 cal16.736 j
5 cal20.920 j
6 cal25.104 j
7 cal29.288 j
8 cal33.472 j
9 cal37.656 j
10 cal41.840 j
20 cal83.680 j
30 cal125.520 j
40 cal167.360 j
50 cal209.200 j
60 cal251.040 j
70 cal292.880 j
80 cal334.720 j
90 cal376.560 j
100 cal418.400 j

cal to j Conversion Chart

Difference Between Joules to Gram Calories

AspectJoules (j)Gram Calories (cal)
DefinitionA joule is the SI unit of energy.A gram calorie is a unit of energy commonly used in food energy.
SymbolRepresented by “j”.Represented by “cal”.
Conversion Factor1 joule = 0.239 gram calories.1 gram calorie = 4.184 joules.
UsageCommonly used in physics and engineering.Commonly used in nutrition and food energy.
System of UnitsPart of the International System of Units (SI).Not part of the SI system; used in the cgs (centimeter-gram-second) system.
Energy MeasurementMeasures energy, work, or heat.Measures the amount of energy needed to raise the temperature of 1 gram of water by 1°C.
ApplicationUsed for scientific calculations and energy measurements.Used to quantify the energy content in food and beverages.
PrecisionMore precise for scientific calculations.Less precise compared to joules for scientific purposes.

1. Solved Examples on Converting Joules to Gram Calories

Example 1

Problem: Convert 500 joules to gram calories.

Solution: Calories=500 j/4.184= 119.50 cal

So, 500 joules is approximately 119.50 gram calories.

Example 2

Problem: Convert 1000 joules to gram calories.

Solution: Calories=1000 j/4.184=238.90 cal

Thus, 1000 joules is approximately 238.90 gram calories.

Example 3

Problem: Convert 250 joules to gram calories.

**Solution: Calories=250 j/4.184=59.75 cal

Therefore, 250 joules is approximately 59.75 gram calories.

Example 4

Problem: Convert 750 joules to gram calories.

Solution: Calories=750 j/4.184=179.25 cal

Hence, 750 joules is approximately 179.25 gram calories.

Example 5

Problem: Convert 200 joules to gram calories.

Solution: Calories=200 j/4.184=47.80 cal

So, 200 joules is approximately 47.80 gram calories.

2. Solved Examples on Converting Gram Calories to Joules

Example 1

Problem: Convert 100 gram calories to joules.

Solution: Joules=100 cal×4.184=418.4 j

So, 100 gram calories is approximately 418.4 joules.

Example 2

Problem: Convert 250 gram calories to joules.

Solution: Joules=250 cal×4.184=1046 j

Thus, 250 gram calories is approximately 1046 joules.

Example 3

Problem: Convert 500 gram calories to joules.

Solution: Joules=500 cal×4.184=2092 j

Therefore, 500 gram calories is approximately 2092 joules.

Example 4

Problem: Convert 750 gram calories to joules.

Solution: Joules=750 cal×4.184=3138 j

Hence, 750 gram calories is approximately 3138 joules.

Example 5

Problem: Convert 1000 gram calories to joules.

Solution: Joules=1000 cal×4.184=4184 j

So, 1000 gram calories is approximately 4184 joules.

Why do we convert joules to gram calories?

Converting joules to gram calories is often useful in the context of food energy, where gram calories are commonly used to express the energy content of food and beverages.

Are joules and gram calories used in different fields?

Yes, joules are commonly used in scientific and engineering fields, while gram calories are mainly used in nutrition and dietetics to measure food energy.

Can I use a calculator to convert joules to gram calories?

Yes, you can use a calculator to convert joules to gram calories. Simply divide the number of joules by 4.184 using the calculator.

Can joules and gram calories be used interchangeably?

While joules and gram calories can be converted between each other, they are not interchangeable because they serve different purposes. Joules are often used in scientific and engineering contexts, whereas gram calories are typically used in nutrition.

Is there a quick way to estimate joules to gram calories conversion?

A quick way to estimate joules to gram calories conversion is to remember that approximately 4 joules equal 1 gram calorie, though the exact conversion factor is 4.184.

Why is it important to convert joules to gram calories in nutrition?

Converting joules to gram calories in nutrition is important because food energy is commonly expressed in calories, making it easier for people to understand and manage their dietary intake.