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Weight Gain / Loss Time Calculator
Find how many weeks you need to reach your target weight.
About this calculator
Time = weight to change ÷ change per week. A change of 0.5 kg a week needs about 550 kcal a day more or less than maintenance, using 7,700 kcal per kg. Example: 70 kg to 65 kg at 0.5 kg a week takes 10 weeks. Real results vary. General information only, not medical advice. Please talk to a doctor or dietitian before changing your diet or exercise.
Results are estimates for information only. Please confirm important decisions with a qualified professional.
Frequently asked questions
What is a safe weekly change?
Many guides suggest about 0.25 to 0.5 kg a week for most people. Faster loss should be supervised by a doctor.
Why did I not lose what the calculator said?
Water, muscle gain, sleep and tracking errors all affect the scale. Look at the trend over weeks.