How Many Calories to Eat to Lose Weight
To lose weight, eat about 500 kcal a day less than your maintenance calories (your TDEE). The Malaysian Dietary Guidelines 2020 describe a safe loss of 0.5 to 1 kg a week as usually needing a 500 to 1,000 kcal daily reduction. For an average Malaysian adult, that means roughly 1,450 kcal for women and 1,800 kcal for men.
Those averages are only a starting point. Two people of the same weight can burn hundreds of calories a day apart, which is why the target that works for your colleague can leave you stuck or starving. This guide walks through the three-step method: estimate your maintenance, choose a deficit you can live with, and use two to three weeks of real results to correct the estimate. It also shows what a 500 kcal deficit looks like at a mamak or kopitiam, not just on a spreadsheet.
What are maintenance calories (TDEE)?
Maintenance calories are the amount that keeps your weight stable. The technical name is TDEE, total daily energy expenditure. It is the sum of four things:
- Basal metabolic rate (BMR): the energy your body uses at rest to breathe, circulate blood and keep warm. For most people this is the biggest share.
- Digestion: a smaller amount of energy spent breaking down food.
- Exercise: deliberate training such as gym sessions, running or futsal.
- Everyday movement: walking to the LRT, climbing stairs, standing at work, housework. This varies most between people.
For a sense of scale, the Malaysian Dietary Guidelines 2020 (Table 2.3) list average TDEE for Malaysian adults aged 30 to 60 at 9.53 MJ a day for men and 8.17 MJ for women, about 2,280 kcal and 1,950 kcal. Subtract 500 and you get the averages in the opening paragraph. Your own number may sit well above or below.
How do you calculate your TDEE?
Calculators start with your BMR, estimated from age, sex, height and weight, then multiply by an activity factor. The Mifflin-St Jeor equation is the usual choice. A 2005 systematic review in the Journal of the American Dietetic Association found it predicted resting metabolism within 10% of measured values for more people than any other equation tested, but it also noted significant errors for individuals and possibly for some ethnic groups. Treat the output as an educated guess.
The activity factor is where most people flatter themselves:
| Activity level | Typical day | Common multiplier |
|---|---|---|
| Sedentary | Desk job, little deliberate exercise | 1.2 |
| Lightly active | Light exercise 1 to 3 days a week | 1.375 |
| Moderately active | Training 3 to 5 days a week or on your feet most of the day | 1.55 |
| Very active | Hard daily training or heavy physical work | 1.725 |
Three gym sessions a week does not make you "very active" if the other 23 hours of the day are spent sitting. When in doubt, pick the lower band. The TDEE calculator does this arithmetic for you.
Worked example
Take a 30-year-old woman, 160 cm and 65 kg, with an office job and two workouts a week:
- BMR (Mifflin-St Jeor): (10 × 65) + (6.25 × 160) − (5 × 30) − 161 ≈ 1,340 kcal.
- TDEE: 1,340 × 1.375 (lightly active) ≈ 1,840 kcal.
- Target: 1,840 − 500 ≈ 1,340 kcal a day.
For a 35-year-old man, 172 cm and 80 kg, with the same lifestyle: BMR ≈ 1,705 kcal, TDEE ≈ 2,345 kcal, target ≈ 1,850 kcal a day.
How big should your calorie deficit be?
A common rule of thumb is that about 7,700 kcal equals 1 kg of body fat, so a 500 kcal daily deficit predicts roughly 0.5 kg a week. That works for the first few weeks. Over months, it overestimates. A 2011 modelling study in The Lancet by Kevin Hall and colleagues showed that as you lose weight, your body burns less energy, so a fixed calorie cut produces progressively slower loss. Their rule of thumb: each 100 kJ (about 24 kcal) daily change in intake eventually changes body weight by about 1 kg, with half of that reached in about a year.
| Daily deficit | Approx. early weekly loss | Trade-off |
|---|---|---|
| ~250 kcal | ~0.25 kg | Slow, very easy to sustain, good for people with little to lose |
| ~500 kcal | ~0.5 kg | The usual sweet spot: steady progress, manageable hunger |
| ~750 to 1,000 kcal | ~0.75 to 1 kg | The upper end of the guideline range; more hunger and fatigue, harder to stick to |
These are approximations. Weekly weight is noisy, and early losses include water. Pick the row you can live with for months, not the one that looks best on paper. A deficit you abandon in three weeks loses to a smaller one you hold for three months.
What does a 500 kcal deficit look like in Malaysian food?
You do not have to eat salad to save 500 kcal. Table 2.4 of the Malaysian Dietary Guidelines 2020 lists the calories in common dishes alongside lighter alternatives. A few swaps from that table:
| Instead of | kcal | Try | kcal | You save |
|---|---|---|---|---|
| Fried kuey teow (380 g plate) | 670 | Kuey teow soup (360 g bowl) | 260 | ~410 |
| Fried mee (300 g plate) | 519 | Mee soup (300 g bowl) | 204 | ~315 |
| Nasi briyani, rice only (245 g) | 448 | White rice (159 g plate) | 207 | ~240 |
| 2 pieces of roti canai (84 g each) | 532 | 1 capati (64 g) | 192 | ~340 |
| Teh tarik (250 ml mug) | 140 | Teh-O (250 ml mug) | 60 | ~80 |
Two swaps a day, such as soup noodles instead of fried at lunch and teh-O instead of teh tarik twice, already gets most people close to 500 kcal without changing where they eat. Drinks add up surprisingly fast; our guide to kopitiam drink calories goes through the full menu, and hawker economy rice for weight loss covers building a lighter nasi campur plate.
Why does hitting your target matter more than the exact number?
The exact target matters much less than how consistently you hit a reasonable one. A 1,800 kcal target you hit five days out of seven, week after week, will beat a "perfect" 1,650 you hold for four days and then abandon for three.
This takes the pressure off getting the starting number exactly right. You need a sensible target and a log honest enough to tell you whether you are hitting it. That is where most deficits quietly fail: not in the plan, but in the gap between what you eat and what you record. A classic 1992 study in the New England Journal of Medicine found that a small group of people who believed they could not lose weight on under 1,200 kcal a day were in fact eating about twice what they reported.
Fast logging closes that gap. When you can count calories from a photo in a few seconds, the daily cost of staying in a deficit drops, and you are more likely to log the teh tarik and the extra scoop of rice too.
Why has my weight loss stalled?
Even when you do everything right, the scale will sometimes stop moving. Before cutting calories in a panic, check these:
- Water, not fat. Salty meals, hard workouts, hormones and poor sleep all shift water weight. A flat or higher reading for a few days often hides real fat loss. Judge the trend over two to three weeks.
- Logging drift. Portions creep, "just a bite" adds up, and drinks and cooking oil go unrecorded. Our list of calorie-counting mistakes that stall weight loss covers the usual culprits.
- Your maintenance has dropped. A smaller body burns fewer calories, as the Hall model shows. Recalculate your TDEE every 4 to 5 kg lost, then trim 100 to 200 kcal or add daily movement if the trend is genuinely flat.
A true plateau is a flat trend over two to three weeks, not one bad morning.
Who should get professional advice before cutting calories?
This guide is general information, not medical advice. Talk to a doctor or registered dietitian before starting a calorie deficit if you are pregnant or breastfeeding, under 18, have diabetes, kidney disease or another chronic condition, take medication that affects appetite, weight or blood sugar, or have a history of disordered eating. If counting calories makes you anxious or obsessive, stop and get support; there are other ways to manage weight.
How do you put this into practice?
The method is a loop you repeat:
- Estimate your TDEE honestly, using the TDEE calculator.
- Subtract about 500 kcal.
- Log what you eat, every day, including drinks and weekends.
- Weigh yourself a few times a week and look at the two-to-three-week trend.
- Adjust by 100 to 200 kcal only when the trend tells you to.
Once your calorie target is steady, splitting it into protein, carbs and fat with the macro calculator helps you keep muscle and stay full while you lose.
If logging is the part you struggle with, Berry Best lets you tell Berry, its AI coach, what you ate by photo, text or voice, and tracks your calories against your target and your weight trend over time.
Sources
- Ministry of Health Malaysia. Malaysian Dietary Guidelines 2020, Key Message 2, Tables 2.3 and 2.4.
- Hall K.D. et al. (2011). Quantification of the effect of energy imbalance on bodyweight. The Lancet.
- Frankenfield D. et al. (2005). Comparison of predictive equations for resting metabolic rate in healthy nonobese and obese adults: a systematic review. Journal of the American Dietetic Association.
- Lichtman S.W. et al. (1992). Discrepancy between self-reported and actual caloric intake and exercise in obese subjects. New England Journal of Medicine.
Keep reading
- TDEE calculator: estimate the calories you burn in a day.
- Macro calculator: split your target into protein, carbs and fat.
- How to track macros: a beginner's guide: the next step once calories feel easy.
- 7 calorie-counting mistakes that stall fat loss: why a deficit on paper can vanish in practice.
- Kopitiam drink calories: how much your daily kopi and teh add up to.
- Hawker economy rice for weight loss: building a lighter nasi campur plate.
Frequently asked questions
- How many calories should I eat a day to lose 0.5 kg a week?
- Roughly 500 kcal less than your maintenance calories. Work out your TDEE from your age, sex, height, weight and activity, then subtract 500. The Malaysian Dietary Guidelines 2020 describe a safe loss of 0.5 to 1 kg a week as usually needing a reduction of 500 to 1,000 kcal a day. Treat the result as a starting point and adjust after two to three weeks.
- Is 1,200 calories a day enough to lose weight?
- It will produce weight loss for most adults, but it is lower than many people need. A 1,200 kcal target is often a deficit of 700 to 1,000 kcal or more, which makes hunger, fatigue and muscle loss more likely. Start with a moderate deficit from your own TDEE instead, and only go lower with guidance from a doctor or dietitian.
- Why am I in a calorie deficit but not losing weight?
- Usually the deficit is smaller than you think. Common causes are untracked cooking oil, sweet drinks and snacks, portions bigger than logged, a TDEE estimate that was too high, and water retention hiding fat loss. Judge the trend over two to three weeks rather than daily weigh-ins, tighten your logging for a week, then trim 100 to 200 kcal if progress is still flat.
- Should I eat back the calories I burn exercising?
- Generally not all of them. Fitness trackers and gym machines often overestimate calories burned, and your TDEE already includes an activity factor. A safer approach is to set your activity level honestly, keep the same daily target, and eat a little more only on unusually long or hard training days. Let your weekly weight trend tell you if you need more.
- How long does it take to see weight loss from a calorie deficit?
- Most people see a clear trend within two to four weeks. The first week often shows a bigger drop from water and glycogen, then progress slows to a steadier pace. The Malaysian Dietary Guidelines suggest a realistic goal of losing 5 to 10% of your starting weight over three to six months, which is a useful benchmark for patience.