Weight loss

Keep in mind that an overly aggressive deficit may not be safe.

Also depends on what else is going on in your life. Remember that not all weight lost is going to be fat. It's normal for people beginning a weight-loss program to lose more than expected in the first couple of weeks (say, up to 10 lbs), but a good part of it is water weight. TOM (Time of month) often causes water retention at some point in the cycle, which is then lost.

I'll give you a real-life example of my last month. I was out of town visiting my parents for two weeks. Their food scale wasn't digital; it was the old-fashioned kind with a knob you turn to calibrate (i.e. 'zero out' the weight of the container) and it wasn't all that stable. For the first week, I had more takeout than usual and my parents don't measure precisely when cooking, so I was guesstimating portion sizes. The week after that was Passover, where the dietary restrictions impacted my satiety levels negatively, so I did go off-track a bit.

I came home with a 3.6lb weight gain, of which some of that was definitely fat... but some of it was also water retention from TOM. And possibly other stuff, like more sodium, maybe drinking less fluids, etc. Then I got back to strength training after two weeks. More water retention.

Scale went up very slightly the following week, even though I was back on-program. (I think, 0.2)

A week ago Thursday, I had surgery. Now, to prep for that, the day before, from noon to midnight I was on a clear fluids diet, followed by an enema. Then fasting until after the surgery. At which point, I more or less ate my daily target. Stayed on program the next two days. Sunday AM is my weekly weigh-in. And that danged scale was up another 0.6! And yes. I was angry and frustrated and feeling discouraged. But at the same time, I knew that there was no way that I was gaining fat. Something else was going on. On a hunch, I typed 'Water retention post-surgery' into Google... and learned something new (to me)! YES. Post-surgery, it is NORMAL to retain water. It passes. It passes more quickly if you up your fluid intake—something about your kidneys realizing that with plenty of fluid coming in regularly, they don't need to hold onto what's already there.

Today's weigh-in? I'm down 6.8 lbs since last week. And no, there is no possible way that it's all fat, anymore than my gains for the 3 weeks prior were all fat. Some of it, yes. I'm now down about two pounds from what I was before this roller coaster got started.

Bottom line as it applies to you: The amount of weight that can be lost in a week could be significantly higher than normal (max 1% of your body weight as @kommodevaran states), but it won't necessarily be all fat and can be impacted by stuff other than diet and exercise. But what you should be aiming for is:

75+ lbs set to lose 2 lb range
Between 40 - 75 lbs set to lose 1.5 lb range
Between 25-40 lbs set to lose 1 lb range
Between 15-25 lbs set to lose 1 -.50 lb range
Less than 15 lbs set to lose 0.5 lbs range

weight loss of 0.50 kg per week is possible depends on your diet and age! Not rude I am 61 years old in last 4 weeks I did loose 2 kg this is by intensity minutes to 800 min by only walking; eat heathy and no junk food!
Buy a Garmin HR health fitness watch great value.