Is 100 pounds to skinny for 5'2? 45kgs & 159 cm!

100 pounds is slightly below a healthy BMI for a 5'2 female. So you would be underweight.... Do you consider someone who is underweight "healthy"?

I completely agree
I'm also precisely 159cm and weigh less than 45kg
it depends on your body frame
I don't look skinny, I look healthy :P
But then I was always of a small build to start with
And I'm an Asian and Asian people tend to be lighter if u you know what I mean

I think it's too skinny. I looked it up and even for a small frame 108 is the lowest before you go underweight.

I'm 5 feet and have a large frame and 100 pounds is way too small for me. I'm aiming for 120 ideally.

BMI isn't a hard and fast rule applicable to all ethnicities. Different people have slightly different skeletal composition that contributes to some difference in weight.
Hilary Duff will definitely be considered fat in my culture, Avril Lavigne would be much better in my humble opinion.
But then if you are overweight to start with, I think you should aim for a high normal BMI weight first. You could always readjust your goal when you get to the healthy range, right?

and by the way it depends on whether you are muscular too, as muscles will cost you some weight
personally I'm not muscular :P
but I definitely don't look unhealthy

Look at my pics and judge for yourself. There are many things at play here. I maintain easily at (less than) 100lbs, but if you have to cut calories too low or exercise yourself obsessively then perhaps a slightly higher weight would be better for your body.

I am the same height, and it may be too skinny for you but it's hard to say. Why don't you start out with a more attainable goal? And when you reach it, take it from there.

Definitely depends on the person. Likely to be underweight, but if you can set the goal but not be attached to the specific number, and then pay attention to how fit you are, you should be fine. I am gaining about a pound of muscle for every five pounds of fat I'm losing, and so my current goal at 5' 8", 38 yrs old, always been chesty (even as a teen) and very wide hipped, medium/large frame, is 160, with the notion that I'm aiming to drop a good 25 pounds of fat more, and expect (and be happy) to gain 5 pounds of muscle. At that stat, I'll be about 25% body fat, which is way safe and I'd still have room to lose, just not interested in killing myself or anything. Please just don't wind up being one of the anorexic kids who seem to get on here and strive to eat as little as possible... I'm sure you're not. Rest assured that if you stay dedicated to working out tough, feed yourself 90% very wholesome foods and eat within a sane calorie restriction, you'll eventually get to something like your visual goal, whatever the scale says. Won't be overnight, but you'll feel great all the time and be proud, and it will last when you get there. Finally, if your weight loss is set to 2 pounds a week, please NEVER eat less than your goal intake and DO eat back any exercise cals. Better to set it to 1 pound, where you could safely be a couple hundred cals under and/or let your workouts (not "eating them back") create that bit of extra deficit, then find you're exceeding that goal most weeks.

It honestly depends! I have a friend who is slightly taller and she has hit 45kgs, however now she is having all soughts of other health issues and this includes her heart which is in a bad way! She is 21 and they are about to hospitalise her. she is 5"5

so your 3inche shorter, so maybe 45kgs will be fine for you, but I would say listen to your body.

Thats my 2 cents worth

I'm 5'0 and 100lbs on me makes me look sickly and frail. I don't start looking healthy until 110lbs.

I think it's a great goal to have. Try to get to that weight, but re-evaluate as you go, you may look stellar at 110

I'm 159cm & I weigh 60kg at the moment. More than enough for me. Healthy range.

It depends on the person. I am 5'2" and I weigh 100 pounds. I always have. And I eat 1900 to 2100 calories (never less than 1700 or 1800). I am at 18% bodyfat. I have a very small frame. My waist is 23 inches, my wrists are less than 5 inches, my feet are shoe size 5.5. My doctor says I am healthy and not underweight, as has every doctor I have ever had. You can tell by looking at me, in person, that I am not underweight. I have had 2 children. You can also look at my pics if you want. I am 100 pounds in all of those pictures. All of my pictures are of me, including my ticker. Feel free to add me as a friend anyone.

that's my GOAL!!! LOL. It may be a little light but my maintenance goal for life is going to be between 100 and 105. I've been around 102 before a few times in my roller coaster life and it feels wonderful. I agree with the other posters that everyone is different. I know I am small boned and until I get down to 102 or less, my "problem" areas don't lose.

Nobody is "small boned" just like nobody is "big boned"

Actually that is not correct. People use the big bone excuse to explain their weight incorrectly. But, people do have different sized bones and frames. Bones do not simply get longer or shorter. They are different in other ways as well. There is a silly meme photo that shows a man and a woman x-ray (not even the same gender). There is a lot of variation in people in many aspects of the body, bones being one of them. We do not all have the same frame. This misinformation really needs to end.