On Bambu Studio I’ve been working on a project with 5 plates, the separate filament grams calculated together is 957.00 grams, but the section called “All Plates Stats” says it will take 1914.01 grams. The whole project was 957 grams in the end. This isn’t a big deal and I can live, but wondering if I’m doing something wrong and if others are experiencing this as well
I observed something similar but I can not recreate the issue consistently. (Occasionally) There’s an error in the summs. Individual lines were correct in the instances I observed.
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No, you are not doing anything wrong. This is a well documented issue and really hasn’t gotten any attention from the open-sources developer community. I guess it’s not high on their list. Also, one must note that when adding up the different plates, thinks like supports and such don’t appear to be accurately accounted for, or so that’s the theory anyway, there hasn’t been any exhaustive data on this.
Also, the weight calculation is more of a guideline that isn’t very accurate to begin with and truth be told, the volunteer community and commercial vendors who support the open-source variants from which Bambu Studio is derived from, have not made it a priority and if you think about it, is it really that significant compared to other technical objectives on their long laundry lists of requests such as adding surface features and better printer accuracy.
Here’s where that weight factor is calculated from and you can see that by increasing it by 50% doesn’t exactly yield an increase by 50% calculation. 
I guess this algorithm won’t be used any time soon in rocket launches. 
If increase the density by 50% I get a 50% increase in weight… almost…
I’ve gone down the rabbit hole of getting this to be more accurate and can share with you one method that yielded mixed results. If this is important to you then I’d recommend printing a sample of some type, weighing it and then changing the density accordingly, but be warned that others have tried this and learned that slicer settings such as wall type and such can throw off the calculation. Also, moisture content of the filament varies as you know and therefore so does density.
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Same thing. If I remove the plate with different filament, it calculates it correctly.
It seems to have trouble when using more then one filament.
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Same error here, it just set in the “Support” column same value as “Model column”. If you summs individual rows gonna get the correct value
Any fix?
Same here. My print had 6 plates and used about 600 grams total but it said that it used like 1300. Mine also said the same value for ‘support’ and ‘model’ when you add them up, you should get the right answer.
I guess you could slice them individually but I have not tried it.