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Plan all-grain recipes quickly from target OG, batch size, efficiency, and grain bill percentages. Get total grain needed, malt split, and a mash water estimate for your next brew day.
Last updated: April 13, 2026
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Percentages must total 100%.
Total grain bill
9.78 lb
4.44 kg
Base malt
8.31 lb
Crystal malt
0.98 lb
Roast malt
0.49 lb
Estimated mash water
3.06 gal (11.57 L)
Summary
For 5 gal at OG 1.050 and 72% efficiency, estimate about 9.78 lb (4.44 kg) of total grain.
Steps
Brewing note
This is a planning estimate. Actual gravity depends on crush, mash conversion, boil vigor, losses, and system efficiency. Calibrate with your own brew logs.
Homebrewers often estimate grain weight using gravity points (GU), malt potential (PPG), and brewhouse efficiency. This calculator combines those into a quick planning result and then applies your malt split percentages to show each grain amount.
Total gravity points = (OG - 1) x 1000 x batch gallonsTotal grain (lb) = gravity points / (weighted PPG x efficiency)Share it with homebrewers and recipe developers
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