Converting kilojoules (kJ) to calories (Cal) is essential for understanding energy content in foods and managing dietary intake. One kilojoule is approximately equal to 0.239 food calories. To convert kilojoules to calories, multiply the energy in kilojoules by 0.239. For example, 500 kJ × 0.239 ≈ 119.5 Cal. Conversely, to convert calories to kilojoules, multiply the energy in calories by 4.184. For instance, 200 Cal × 4.184 = 836.8 kJ. Understanding these conversions aids in accurately assessing energy consumption and expenditure.