Coffee roast weight loss: green to roasted yield table

Coffee loses weight as it roasts, mostly water. Roast weight loss is the drop in weight from green to roasted, as a percentage. The tables are plain arithmetic: roasted weight = green weight × (1 − loss).

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Green weight	12% loss	14% loss	15% loss	16% loss	18% loss	20% loss
100 g green	88 g	86 g	85 g	84 g	82 g	80 g
225 g green	198 g	194 g	191 g	189 g	184 g	180 g
250 g green	220 g	215 g	212 g	210 g	205 g	200 g
454 g green	400 g	390 g	386 g	381 g	372 g	363 g
500 g green	440 g	430 g	425 g	420 g	410 g	400 g
1000 g green	880 g	860 g	850 g	840 g	820 g	800 g

Green coffee needed for one pound (454 g) roasted

	12% loss	14% loss	15% loss	16% loss	18% loss	20% loss
Green needed	516 g	528 g	534 g	540 g	554 g	568 g

Arithmetic only; measure your own roaster's loss.