How to set a calorie target
A daily calorie target is not a random number: it starts from your body’s energy needs and is then adjusted for your goal and how fast you want to reach it. This guide explains the steps to the target, what the pace adjustments mean, and when to be careful. Its worked example sticks to the same values used by Klar’s calorie intake calculator.
From your body’s needs to the target
First, compute your basal metabolic rate (BMR) from your weight, height, age and sex, then multiply it by your activity factor for total daily energy expenditure (TDEE) — your needs before any adjustment. Second, adjust the target to your goal: losing subtracts from TDEE, gaining adds to it, and maintaining leaves it as is.
The pace adjustments
The daily calorie adjustments are: slow ±250, moderate ±500, fast ±750 calories. These correspond roughly to a weekly change of 0.25 / 0.5 / 0.75 kg for loss or gain. Fast paces are harder to sustain and may lose muscle along with fat, so most professionals favour moderate loss.
A worked example
Using the same values as the calculator: female, age 25, weight 60 kg, height 165 cm, moderate activity, goal lose at a moderate pace. BMR is about 1,345 calories/day, TDEE about 2,085 calories/day, and the daily target about 1,585 calories/day (TDEE − 500).
When to be careful
The results are estimates, not medical advice. Generally do not go below about 1,200 calories a day without professional supervision, and be wary of prolonged fast deficits. Do not use this for weight loss during pregnancy or breastfeeding: loss targets are unsuitable in this stage — consult a professional.
Common mistakes
Among the mistakes: choosing an activity level higher than reality, picking a fast pace without understanding its risks, and treating the target as a rigid number instead of a reference that adjusts as weight and activity change. Do not add your exercise burn twice: the right activity level already includes its effect in TDEE.
Key takeaways
- The target starts from TDEE, then adjusts for goal and pace.
- Adjustments of 250/500/750 calories ≈ 0.25/0.5/0.75 kg per week.
- Moderate loss is easier to sustain and safer than fast loss.
- Generally do not go below about 1,200 calories a day without supervision.
- The target is a reference that adjusts with weight and activity, not a rigid number.
Frequently asked questions
How fast is it safe to lose weight?
A moderate loss of about 0.5 kg per week (a 500-calorie daily deficit) is common and sustainable, while a faster deficit is harder and needs supervision.
Can I use this while pregnant?
No. Weight-loss targets are unsuitable during pregnancy or breastfeeding; consult a professional for any dietary changes in this stage.
What if I exercise?
If you choose the activity level that matches your training, the calculator already includes its effect in TDEE. Do not add an estimated burn twice.
Related calculators
Calorie intake calculator
Estimate your daily calorie target for losing, maintaining or gaining weight based on your activity and goal.
BMR calculator
Estimate your basal metabolic rate and daily energy expenditure using the Mifflin-St Jeor equation.
BMI calculator
Calculate your body mass index from weight and height, and see the healthy weight range for your height.