How Fast Should You Cut? Safe Rates of Fat Loss
Losing weight too slowly kills motivation, and too fast costs muscle. Here's how to choose a sustainable cutting rate and turn it into daily calories.
For most people, a sensible cutting rate is about 0.5 to 1% of bodyweight per week. That's roughly 0.4 to 0.9 kg (about 1 to 2 lb) per week for someone weighing 90 kg, and less for a lighter person. Leaner people should aim for the lower end to protect muscle, while people with more fat to lose can often sit near the top end comfortably. Going faster than that tends to cost muscle, energy and adherence, and usually doesn't save as much time as it seems.
Below is how to choose your rate, convert it to calories, and know when to adjust.
Why the rate of loss matters
When you eat less than you burn, your body makes up the difference from stored energy, mostly fat but also some lean tissue. How much of each you lose depends on several things: how much fat you have, how much protein you eat, whether you lift weights, and how large the deficit is.
A moderate deficit gives you a good balance:
- Fat loss is steady enough that you see progress on the scale and in the mirror within a few weeks.
- Training performance holds up, so you keep giving your muscles a reason to stay.
- Hunger and fatigue stay manageable, which matters more than anything for finishing the cut.
A very aggressive deficit flips that balance. Strength drops, you feel flat, hunger gets louder, and you're more likely to rebound. That's why the right question isn't "how fast can I lose it?" but "how fast can I lose it and keep going?"
Recommended rates by starting point
These ranges reflect common coaching practice and mainstream evidence. They're starting points, not rules.
| Your situation | Weekly loss target | Why |
|---|---|---|
| Higher body fat, newer to training | 0.75-1% of bodyweight | More fat available, muscle loss risk lower |
| Moderate body fat, some training history | 0.5-1% of bodyweight | Balanced pace for most people |
| Already lean, close to visible abs | 0.5-0.7% of bodyweight | Higher muscle loss risk near the end of a cut |
| Contest-level lean or very small body | 0.25-0.5% of bodyweight | Slowest pace protects muscle and performance |
If you're unsure which row you're in, the body fat calculator gives a rough estimate, and our body fat percentage chart shows what different levels tend to look like.
Turning a rate into calories
A common rule of thumb is that one kilogram of body fat stores about 7,700 kcal (about 3,500 kcal per pound). It's an approximation, since real weight loss includes water and some lean tissue, but it's useful for planning.
Worked example
Say you weigh 80 kg and want to lose 0.75% per week.
- Weekly target: 80 x 0.0075 = 0.6 kg per week.
- Weekly deficit: 0.6 x 7,700 = about 4,600 kcal.
- Daily deficit: 4,600 / 7 = about 660 kcal.
- If your estimated maintenance is 2,600 kcal, your starting target is around 1,950 kcal per day.
To get your maintenance number, use the TDEE calculator. The cutting calculator does the whole calculation for you, and the goal weight date calculator shows when you'd reach a target at your chosen pace.
Remember these are estimates. Your real maintenance could be a few hundred calories higher or lower, which is why tracking matters.
How to protect muscle while you cut
Rate is only one piece. Three habits make a big difference to what you lose:
- Keep lifting. Train with weights at least two or three times a week, and try to maintain your strength on key lifts.
- Eat enough protein. Around 1.6 to 2.2 g per kg of bodyweight per day is a widely used range for people cutting while lifting. The protein calculator can give you a target.
- Sleep. Poor sleep tends to increase hunger and make training harder.
For a fuller breakdown, see how to lose fat without losing muscle.
How to tell if you're on pace
Daily scale weight bounces around with water, salt, carbs, digestion and hormones. Don't judge your rate from one or two weigh-ins.
- Weigh yourself each morning after using the bathroom, before eating.
- Take the weekly average.
- Compare averages week to week.
- Give it two to three weeks before making changes, because the first week often shows a larger drop from water and glycogen.
If your average is dropping within your target range, change nothing. If it's dropping much faster, add calories. If it isn't moving after two or three weeks, reduce calories by 100 to 200 per day or add some daily steps. The weight loss percentage calculator makes the percentage math quick.
Signs you're cutting too fast
- Your strength is dropping noticeably week after week.
- You're constantly exhausted, irritable or sleeping badly.
- Hunger is so intense it dominates your thoughts.
- You're losing well above 1% of bodyweight per week after the first couple of weeks.
- Workouts you used to handle now feel impossible.
If several of these show up, ease the deficit. Losing slightly slower and staying consistent beats losing quickly and quitting. Very low calorie diets should only be done under medical supervision, and if dieting starts to feel obsessive or harmful, please talk to a doctor or a qualified professional.
What about short, aggressive cuts?
Some lifters run a short, faster cut of a few weeks, known as a mini cut. It can work for people who are already fairly lean and training hard, but it's a deliberate, time-limited tool, not a default approach. For most people, a moderate pace held for longer gives better results.
If you hit a stall partway through, fat loss plateau walks through the most common causes.
Where AbShred fits
Scale weight tells you part of the story. AbShred, an iPhone app launching soon, estimates a body-fat range and scores six ab zones from one photo, and you rescan weekly in the same light to see how the estimates change during a cut. It's an AI estimate for motivation, not a body-composition test. You can join the waitlist.
FAQ
Is losing 1 kg a week too fast?
It depends on your size. For someone weighing 120 kg, 1 kg is under 1% and may be fine. For someone weighing 60 kg, it's well above 1% and is likely too aggressive for most of a cut.
How long should a cut last?
Long enough to reach your goal at a sustainable pace. Many people plan 8 to 16 weeks, sometimes with a short break at maintenance partway through if they have a lot to lose.
Why did I lose a lot in the first week?
Early drops often include water and stored carbohydrate. Expect your rate to settle after the first week or two.
Should I cut slower as I get leaner?
Usually, yes. As you approach a lean body fat level, a slower rate tends to help you hold onto muscle and keep training quality high.
Can I cut without counting calories?
Yes, as long as your weekly average weight is moving at the pace you want. Tracking simply makes it easier to adjust precisely.