How Long Does It Take to See Weight Loss Results? A Realistic Timeline

Written by Robbie Clark, BExSc (Nutrition), M (Nutr+Diet), Accredited Practising Dietitian (APD) and Exercise Scientist · Last updated 19 October 2026 · 7 references

You've started moving more and eating better, so when will you see results? The honest answer is that it depends on where you're starting from and what you're changing. Here's what a realistic timeline looks like, why weight loss gets harder over time and how to keep going.

How long does it take to see weight-loss results?

Most people can expect to lose about ½ to 1 kg a week once they've made steady changes to how they eat and move. Losing weight at this pace is considered reasonable and is more likely to be maintained than faster loss from crash diets.⁴

Weight loss is rarely a straight line. The first few weeks are often faster, partly because you lose some water as well as fat. After that, it usually slows, and it's normal to have weeks where the scales don't move.

You may notice other changes before the scales shift, such as better energy, sleep or fitness, or clothes fitting differently.

What actually causes weight loss?

To lose weight, you need to use more energy (kilojoules) than you take in from food and drink. Australian guidance suggests a modest energy deficit of about 2,000–4,000 kJ a day.⁶ You can get there by eating a little less, moving a little more, or both.

The energy your body uses at rest depends largely on your age, sex, body size and genes, so it differs from person to person. That's one reason two people following the same plan can get different results.

Why is it harder to lose weight than to gain it?

When you lose weight, your body tries to win it back. In one study, adults who lost about 13 kg still had lower levels of leptin (a hormone that signals fullness), higher levels of ghrelin (a hormone that drives hunger) and felt hungrier a year later.¹ This isn't a lack of willpower. It's biology, and it's why keeping weight off needs long-term habits rather than a short-term diet.

Many other things affect weight too, including sleep, stress, medicines, some medical conditions and the environment you live and work in. If you're finding it very hard to lose weight, talk to your doctor about whether something else could be playing a part.

How much weight do you need to lose to see health benefits?

Less than you might think. Losing even 5–10% of your body weight can lower your risk of heart disease, type 2 diabetes, high blood pressure and sleep apnoea.⁵

In a major trial of adults at high risk of type 2 diabetes, a lifestyle program aiming for 7% weight loss and at least 150 minutes of activity a week cut the number of people who developed diabetes by 58%.³

How much exercise helps with weight loss?

Exercise on its own leads to fairly modest weight loss. More than 150 minutes a week of moderate activity is linked with a loss of about 2–3 kg, and around 225–420 minutes a week, usually combined with eating changes, with larger losses.² Keeping weight off may take more activity: around 60 minutes of moderate activity a day has been suggested.²

Australia's guidelines recommend at least 30 minutes of moderate to vigorous activity on most days, plus muscle-strengthening activities on at least two days a week.⁷ Strength training helps you keep muscle while you lose weight.²

What helps you lose weight and keep it off?

• Skip crash and fad diets. They often lead to weight coming back once you stop.⁴
• Eat regular meals. Skipping meals often leads to overeating later.
• Fill half your plate with vegetables. They're filling, high in fibre and low in kilojoules.
• Watch portion sizes, especially of energy-dense foods.
• Limit sugary drinks. Soft drinks, energy drinks and large juices add kilojoules without filling you up. Make water your main drink.
• Keep tempting foods out of easy reach.
• Notice emotional eating. Stress, tiredness and boredom are common triggers.
• Get enough sleep. Adults should aim for 7–9 hours a night, with regular bed and wake times.⁷
• Get support. A dietitian, exercise physiologist or psychologist can help you build a plan that suits you. Weight-loss medicines are also an option for some people.⁵

Frequently asked questions

How much weight can you safely lose in a week?

About ½ to 1 kg a week is considered reasonable and more likely to be maintained.⁴

Why have I stopped losing weight?

Plateaus are common. As you lose weight, your body needs a little less energy and your hunger can increase, so progress slows.¹

Can I lose weight with exercise alone?

Exercise alone usually leads to modest weight loss; combining it with eating changes works better.²

How long until other people notice?

It varies, but many people notice changes in how their clothes fit, their energy or their fitness before the scales show a big change.

Is losing a small amount of weight worth it?

Yes. Losing 5–10% of your body weight can lower your risk of several health conditions.⁵

References

Research (PubMed)

1. Sumithran P, Prendergast LA, Delbridge E, et al. Long-term persistence of hormonal adaptations to weight loss. N Engl J Med. 2011;365(17):1597–1604. PubMed 22029981
2. Donnelly JE, et al. American College of Sports Medicine position stand: appropriate physical activity intervention strategies for weight loss and prevention of weight regain for adults. Med Sci Sports Exerc. 2009;41(2):459–471. PubMed 19127177
3. Diabetes Prevention Program Research Group. Reduction in the incidence of type 2 diabetes with lifestyle intervention or metformin. N Engl J Med. 2002;346(6):393–403. PubMed 11832527

Australian guidelines

4. Better Health Channel (Victorian Government). Weight loss – a healthy approach. View source
5. healthdirect. Obesity. View source
6. Australian Diabetes Society, Australian and New Zealand Obesity Society and Obesity Surgery Society of Australia and New Zealand. The Australian Obesity Management Algorithm. View source
7. Australian Government Department of Health. Australian 24-Hour Movement Guidelines for Adults. View source

This article is general information, not medical advice. Speak with your practitioner about your own situation before changing your diet or activity.