How to lose weight, calmly: what actually works
To lose weight, you need to eat a little less energy than your body uses, a calorie deficit, and keep it up for weeks. A deficit of about 300 to 500 kcal a day is enough for most people: about 0.3 to 0.5 kg a week, without feeling starved.
What is a calorie deficit?
Your body burns energy all day: to keep you alive (your basal metabolic rate), to digest food, and to move. A calorie deficit means eating fewer calories than that total, so your body draws the difference from its reserves, mostly fat.
No diet works without one, whether it is low carb, intermittent fasting or plant based. What changes between diets is how easy the deficit feels. The best plan is the one you can keep on a busy Tuesday, not the strictest one.
How many calories should you eat to lose weight?
Start from your daily energy needs. The most used formula is Mifflin-St Jeor, which estimates your basal metabolic rate from your age, sex, height and weight; multiplying it by your activity level gives your total daily energy expenditure. Eat a little under that number.
| Daily deficit | Expected pace | How it feels |
|---|---|---|
| 250 kcal | About 0.25 kg a week | Barely noticeable, good for the last kilos |
| 500 kcal | About 0.5 kg a week | The usual target, sustainable for months |
| 750 kcal | About 0.75 kg a week | Faster, but hunger and fatigue show up |
A kilo of body fat holds roughly 7,700 kcal, but weight loss is not a straight line: water moves a lot in the first weeks, and your body slowly adapts to eating less. Tools like the NIH Body Weight Planner model this. Unless a doctor supervises it, most guidance advises against going below about 1,200 kcal a day for women or 1,500 for men.
The habits that make weight loss work
Track what you eat, even roughly
Keeping a food log is one of the habits most consistently linked to losing weight. It also fixes a blind spot: in a classic study, people underestimated what they ate by close to half. Rough and daily beats perfect and occasional.
Put protein first
Protein keeps you full for longer and protects your muscle while you lose fat. Around 1.2 to 1.6 g per kilo of body weight a day is a good range when you are in a deficit: eggs, yogurt or skyr, fish, chicken, tofu, beans.
Fill up on fibre and volume
Vegetables, fruit, legumes and whole grains bring a lot of food for few calories. Aim for at least 25 to 30 g of fibre a day and half a plate of vegetables at main meals.
Move every day, lift twice a week
The WHO recommends 150 to 300 minutes of moderate activity a week, plus muscle strengthening on at least two days. Walking adds up more than you think, and strength training keeps the weight you lose coming from fat.
Sleep seven hours or more
Short nights raise hunger and cravings. In one trial, people dieting on 5.5 hours of sleep lost about half as much fat as when they slept 8.5 hours, for the same calories.
Watch what you drink
Sodas, juices, sweet coffees and alcohol add calories without filling you up. Swapping them is often the easiest deficit of the day.
Aim for consistent, not perfect
One big dinner does not undo a week. A little room for real life, like a weekly reserve or a grace zone, keeps you going when strict rules would make you quit.
Follow the trend, not the scale
Your weight moves by a kilo from one day to the next with water and salt. Weigh yourself at the same time and look at the weekly average.
Common mistakes that stall weight loss
- Cutting too hard: big deficits bring hunger, lost muscle and rebound.
- All or nothing: one off day turns into an off week.
- Guessing portions: oils, sauces, nuts and drinks are easy to underestimate.
- Eating back every calorie from exercise: activity trackers often overestimate it.
- Changing everything at once: one or two habits at a time stick better.
Losing weight on Ozempic, Wegovy or Mounjaro
GLP-1 medications like semaglutide and tirzepatide lower appetite, so the deficit comes more easily. The risk moves elsewhere: eating so little that a meaningful part of the weight lost is muscle. Put protein first at every meal, keep up strength training, drink enough water, and follow your doctor's advice on doses and side effects.
How Enough helps
Enough is a calorie counter for iPhone built around these habits, without the guilt. Your day fills like a glass up to your line, worked out with Mifflin-St Jeor from your goal. Snap a photo, say what you ate or scan a barcode: logging takes seconds, so tracking becomes a habit instead of a chore. It is one way to do it; any method you can keep up works.
Questions about losing weight
How fast can I safely lose weight?
About 0.5 to 1 kg a week is the usual safe range. Slower loss of about 0.25 to 0.5 kg a week is easier to keep and protects your muscle better.
Can I lose weight without counting calories?
Yes, as long as you eat less than you burn. Counting simply makes the deficit visible; many people track for a few months, learn their portions, then track more loosely.
Can I lose weight without exercise?
Yes, food matters most for the number on the scale. But movement makes the deficit easier, and strength training helps the weight you lose come from fat rather than muscle.
Why did I stop losing weight?
As you get lighter you burn a little less, and portions tend to creep up. Check your logging for a week, recalculate your line for your new weight, and give the trend two to three weeks.
Sources
- Mifflin MD, St Jeor ST, et al. A new predictive equation for resting energy expenditure in healthy individuals. American Journal of Clinical Nutrition, 1990.
- Hall KD, et al. Quantification of the effect of energy imbalance on bodyweight. The Lancet, 2011. NIH Body Weight Planner.
- Burke LE, Wang J, Sevick MA. Self-monitoring in weight loss: a systematic review of the literature. Journal of the American Dietetic Association, 2011.
- Lichtman SW, et al. Discrepancy between self-reported and actual caloric intake and exercise in obese subjects. New England Journal of Medicine, 1992.
- Leidy HJ, et al. The role of protein in weight loss and maintenance. American Journal of Clinical Nutrition, 2015.
- Nedeltcheva AV, et al. Insufficient sleep undermines dietary efforts to reduce adiposity. Annals of Internal Medicine, 2010.
- World Health Organization. Physical activity fact sheet.
- NHS. Healthy weight.
This guide is general information, not medical advice. If you are pregnant, under 18, live with an eating disorder, a medical condition or take medication, talk to your doctor before changing how you eat.