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Pregnancy

Talk about every stage of pregnancy, from early symptoms to preparing for birth.

Baby weights- lbs vs kg

14 replies

Ava50x · 23/07/2021 09:32

I find it really interesting that the hospitals use kg whilst everyone really uses lbs when referring to baby weights.

I remember when DS was born, and they weighed him and said "2.8kg", so I asked, "whats that in lbs?" and they laughed and asked if I want to know the old currency.

Been for a growth scan this week and they told me an estimated weight in lbs, but when baby will be born he will be weighed and given a weight in kg.

On MN everyone uses lbs. So what is this all about really? Guess I just find it rather weird..

I prefer lbs probably because that is just what I am familiar with- anyone else?

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stormelf · 23/07/2021 09:39

When my first born was born I was told her weight in kilo and had to convert it into lb as like you say that's just how people seem to measure weight of babies. However from that moment onwards I just knew her weight in kilo. She's 3 years old now and I have no idea how much she weighs in lb but know it in kilo

SouthwestSis · 23/07/2021 09:50

The red book that your child will be weighed on has centile charts in kilos. We use metric in the rest of the NHS for drug calculations, fluid calculations etc so babies get weighed and plotted in metric too.

Dyra · 23/07/2021 09:52

Hospitals use it because it's scientific standard. Tbh I wish everything would convert to metric. Rather than the hybrid system we have going now. Seems to be only personal information (weight and height), and roads (speed and distance) where we use it for nowadays. Everything else is metric.

choosername1234 · 23/07/2021 09:55

I hate this half arsed attempted to keep both systems going. Metric is so much easier to work with than imperial.
But thanks to being taught metric in schools but real life happening in imperial I now struggle to really visualise both weight & distance properly. For example maths etc was always m/km but all road signs are miles

Chelyanne · 23/07/2021 11:19

They've weighed ours in grams (or rounded in to kilos), I suppose it's just better when they are so little and weight can increase/decrease by such small amounts.
If you tell general people how much a baby weighed/weighs they tend to find pounds and ounces more relatable as most weigh in stones and pounds. We weigh ourselves in kilos at home as we powerlift and we do that in kilos but are fine with either measuring system tbh.

3JsMa · 23/07/2021 11:22

It easier to calculate weight loss percentage,medicines administration and extra feeds based on metric weight rather than imperial.

EdithGrantham · 23/07/2021 11:27

I had a growth scan and they told me estimated weight in grams then said "You can Google what it is in lbs when you're waiting to be seen by the midwife" so it's obviously really common that people have no idea what g/kg really are despite using that in school!
I work in imperial for distances, but metric for lengths of e.g. furniture, imperial for weights (including when baking), for liquids I'd think in terms of pints/half pints, would use ml for anything in-between. I don't mind it being a bit mixed, it's just what I can visualise easiest based on real-life experiences growing up.

Miliao · 23/07/2021 11:35

I’ve only ever used kilos. Same with all my friends. Maybe it’s a generational thing? I have no idea what a pound looks like!!

Aranciata · 23/07/2021 11:39

I prefer the metric system in general, it is easier to use and @Chelyanne and @3JsMa make good points about accuracy and easier to measure small changes and especially when calculating percentages.

If I buy pasta the packet is usually 500g so I can think it's the equivalent of a few packets of pasta or whatever.
I do distances in kilometres too, easier to rack up more kilometres than miles when running, but also for calculating distances between cities.

PrimeraVez · 23/07/2021 11:42

I live in the UAE and here all weights are given in kg and grams. When both my babies were born, I told family in the Uk their weight in kg, and everyone, irrespective of age, said ‘what’s that in lbs?’

DappledThings · 23/07/2021 13:48

I have no idea what anything is in lbs or stones. Or fahrenheit for that matter. Never used is (in my 40s). My parents are in their 70s and entirely metric too.

I find it quite odd when anyone young enough to have a primary age child is discussing their weight in imperial measurements.

ForkedIt · 23/07/2021 13:55

I’ve just realised that I subconsciously switched over to kg at some point but I couldn’t say when. I know my toddler weighs 13kg and have no idea what that is in lb, and I know she was 7lb10oz when born but no idea what that is in kg.
I know my weight in kg, so it is purely small babies that I know in lb clearly!

grey12 · 23/07/2021 17:59

The UK mixed system is very confusing...... I came here to study at university and everything was in Kg. But occasionally you have the odd comment from someone in lb. Only Siri/Alexa can help out :p

Ava50x · 23/07/2021 19:59

Thanks for all the responses!
It does seem interesting how we mix metric and imperial...

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