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Health Calculators/Weight Loss Calculator

Weight Loss Calculator

See how long it will take to reach your goal weight at a steady daily calorie deficit.

Weight Loss Calculator

Planning your weight loss

How it works

Losing 1 kg of body fat takes a deficit of roughly 7,700 kcal (about 3,500 kcal per lb). Your daily deficit sets the pace.

Deficit and pace

  • 250 kcal a day: about 0.25 kg (0.5 lb) a week
  • 500 kcal a day: about 0.5 kg (1 lb) a week
  • 750 kcal a day: about 0.75 kg (1.5 lb) a week
  • 1,000 kcal a day: about 1 kg (2 lb) a week

Your daily calories

The deficit comes off your maintenance calories. Get that number from the TDEE calculator, then subtract the deficit you chose.

Staying on track

  • Log your food so the deficit is real, not a guess
  • Weigh in weekly and follow the trend
  • Keep protein high and keep lifting to hold on to muscle
  • Expect plateaus: loss is rarely a straight line

Good to know

Do not eat below 1,200 kcal (women) or 1,500 kcal (men) a day without medical supervision. Faster is not better if you cannot keep it up.

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