Goal weight calculator
How many weeks until you're at your goal weight? This tool takes the kilos you still want to lose and divides them by your pace, and shows right away why that straight line is an optimistic estimate. If lifestyle changes alone aren't enough, medical guidance can help.
- Weeks to goal weight
- kilos to lose / kg per week
How long weight loss takes
The math behind this tool is simple: the number of kilos you want to lose, divided by your pace in kilos per week. Want to lose 10 kg at a pace of 0.5 kg per week? That's 20 weeks, about 5 months. Choose a gentler pace of 0.25 kg per week and it becomes 40 weeks.
You choose your own pace, within a healthy range of 0.25 to 1 kilo per week. A faster pace sounds appealing because you'll be done sooner, but a bigger weekly loss also needs a bigger daily deficit, and that isn't sustainable for everyone. Use the calculator above to see what's realistic for your kilos and pace.
A pace of 1 kg per week reaches your goal the fastest, but isn't sustainable for most people and only fits significant excess weight. A pace you can stick with gets you further in the end than one you abandon after two weeks.
Why a straight line is optimistic
Divide your kilos by your pace and you get a straight line: the same loss every week, until you land exactly on your goal weight. In practice, weight loss rarely runs that smoothly. The first weeks often move faster, partly from fluid loss, and then the pace gradually slows down.
That slowdown is called metabolic adaptation: your body lowers its energy use as you get lighter, simply because a lighter body costs less to run. Everyday spontaneous movement also tends to drop without you noticing. The result is that, on paper, you should land neatly within the calculated weeks, while in practice you pick up a plateau or two along the way. That's not failure, it's how a body works.
GLP-1 medication supports your sense of fullness, so the deficit needed for the same pace leans less on willpower. The path over time then follows a different pattern than the straight line above. Check the GLP-1 weight loss calculator for an indication based on clinical research.
What a realistic pace looks like
Not every pace fits every situation. These guidelines show what to expect from each one.
- 0.25 kg per week
- The gentlest pace, and for most people the easiest to sustain for months. A good fit if you have less to lose or are just starting out.
- 0.5 kg per week
- The most common pace for sustainable weight loss, with a daily deficit that's manageable for most adults alongside a normal life.
- 0.75 kg per week
- A firmer pace that takes more discipline and a bigger daily deficit. Pay extra attention to enough protein and sleep to limit muscle loss.
- 1 kg per week
- The maximum pace, only appropriate for significant excess weight and preferably under medical guidance.
Not sure which pace fits your situation? Also check your calorie deficit for the daily kcal target that goes with a pace.
Think in phases, not one end date
An end date roughly 20 or 40 weeks out feels concrete, but a long journey is easier to sustain in phases than as one unbroken line to the finish. Split your journey into blocks of 6 to 8 weeks, each with its own milestone, and progress stays visible even when the pace temporarily flattens.
If your journey runs longer than 12 months, check in along the way: does the pace still fit, is the deficit still sustainable, and what did you learn in the last block. That keeps a long journey manageable instead of one big number in the distance.
Stuck on pace, or want guided support toward your goal weight? A doctor and coach work with you to find what's realistic for you.
Take the free checkGeneral information
about GLP-1 medication.
Below you'll find an overview of the best-known GLP-1 medications. This is general, informational content. Which medication, dosage or treatment is right for you is always determined by a doctor during a personal intake, alongside lifestyle guidance.
Semaglutide is a GLP-1 receptor agonist, originally developed for type 2 diabetes. It is also prescribed for people with overweight and obesity.
- Active ingredient
- Semaglutide, a GLP-1 receptor agonist that mimics a naturally occurring hormone in the body.
- Usage
- Once a week via a subcutaneous injection using a prefilled pen.
- Target group
- Registered for type 2 diabetes. Can also be prescribed for overweight and obesity.
- How it works
- Regulates blood sugar levels, reduces appetite and slows gastric emptying for a longer-lasting feeling of fullness.
- Potential weight loss
- An average of 10-15% with regular use and a healthy lifestyle.
- Side effects
- Mainly nausea, gastrointestinal complaints and fatigue. These usually decrease over time.
This medication is available on prescription only and should be used under professional medical supervision. A personal screening and regular check-ins are essential for safe and effective treatment. This medication is not covered by health insurance.
Everything you want to know
about your goal weight.
- How do you calculate your goal weight?
- You set your own goal weight, for example within your healthy weight range. Enter your details in the calculator above for the number of weeks that goes with it.
- How long does it take to lose weight?
- That depends on how many kilos you want to lose and your pace: weeks equals kilos divided by kg per week. Calculate your number of weeks above, or first check your calorie deficit for the matching kcal target.
- When will I reach my goal weight?
- The calculator adds your pace to today's date and shows an expected date. That's a straight-line estimate: in practice the pace often flattens after the first weeks, so treat the date as a direction, not a promise.
- How long does it take to lose 10 kg?
- At 0.5 kg per week, 10 kg takes about 20 weeks, roughly 5 months. At a gentler pace of 0.25 kg per week, that's about 40 weeks. Not sure your goal weight is healthy? Check your BMI first.
- Is my goal weight actually healthy?
- If your goal weight falls under a BMI of 18.5, the calculator shows no numeric result, only an explanation. Not sure what a healthy goal weight looks like? Check your healthy weight range, or discuss it through medical guidance.
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