How many beads in a jar?

[Hellocatshome]

Wise mumsnetters is there a way of working out how many beads will fit in a jar? I want to make a weight loss jar system where you move the beads from the "need to lose" jar in to the "has lost" jar. Each bead representing 1lb. BUT I cant get to the shops so was going to order jars and beads online. So if the beads are 4mm how many ml does the jar need to be if I want to put 34 beads in there? Or alternatively if I have a 750ml jar how big do the beads need to be so it is almost full?

750 ml for only 34 beads is quite big; you’d need beads of 3 cm diameter. For 4 mm diameter beads you’d need a tiny 2 ml test tube.

Good luck - it sounds like a really nice, visual tracker.

I’d buy chunky beads 1cm diameter and get a 40-50cl jar. I think that is about right, but it will be quite easy to check the measurements when you’re dealing with 1cm diameter.

Thank you I'm rubbish at visualising sizes if I cant touch the thing. DS has a massive photo collage on his wall that is basically half the size of the wall as I cant do sizes. 🙈 I'm thinking of doing marbles instead of beads as DS had loads he doesnt play with so now just to work out the size of the jar. I do have some jam DS has nearly finished so I might get him to finish it so I can practice with that one first.

Marbles and a jam jar sounds like a good combination to me!

Apparently a standard marble is 1.3cm across. I think most jam jars are a bit less than 400ml, so might be a bit tight but close run thing, based on my rough estimate. Let us know when you’ve tried it!

I’m quite taken with this idea. Very visually motivating.

These jars are a bit big but you kind of get the idea

You need the wisdom of crowds OP; take photos and ask lots of people.