Energy

Applied Science: BTEC Level 3 National Extended Diploma, topic 3.6.4

Calories

What people call a calorie is technically a kilocalorie. So '1,000 calories' refers to 1,000 kcals.

Calories and joules

Calories and joules

  • One kilocalorie is equal to 4.2 kJ or 4,200 J of energy.
Average male and female intake

Average male and female intake

  • The average woman needs 2,000 kcal (8,400 kJ) per day.
  • The average man needs 2,500 kcal (10,500 kJ) per day.

Test yourself on Energy

  • How many joules are in a kilocalorie?

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