The Formula That Starts With the Taproom

Ask a supplier what size beer brewing system you need and the answer will be shaped by what they have available to sell. Ask yourself the question in the right order and the answer comes from your sales, not from a catalog.

The first number is how many liters of beer will leave the building every week. Not the brewhouse size. Not the fermenter count. The liters sold.

Working Backward From the Taproom

A taproom with forty seats selling an average of two pints per seat per hour across a six-hour service, four days a week, moves roughly nineteen hundred liters per week. Add five local accounts at a hundred liters each and the number climbs to twenty-four hundred.

Add twenty percent for growth and twenty percent for shrinkage, and the target production volume is roughly thirty-four hundred liters per week. That is the number the equipment has to serve.

Three brew days at eleven hundred liters produces thirty-three hundred liters. Two brew days at seventeen hundred liters produces the same. One brew day at thirty-four hundred liters is a very long day with a very large brewhouse and a very small margin for error.

The batch size follows from the brew days. The brew days follow from the labor available. A single brewer can manage one batch per day on a semi-automated system. Three batches per day requires a second person or a higher level of automation, and that labor cost belongs in the budget before the equipment is ordered.

The Fermenter Count That Follows

A beer that ferments for ten days and cold crashes for three occupies a tank for thirteen days. Three brews per week for thirteen days requires enough tanks to hold that volume, which is closer to six fermenters than to three.

The standard ratio of three to four times the brewhouse batch size in total fermentation capacity exists because fermentation takes time and tanks cannot be reused until they are empty. It is not a rule pulled from a catalog. It is arithmetic.

The Packaging Ceiling

A brewhouse capable of thirty-four hundred liters per week feeding a manual canning line capable of five hundred liters per week produces five hundred liters per week. The brewhouse is not the constraint. The packaging line is.

Calculate the cans per hour the line produces and the hours per week you are willing to run it. That number is the real production ceiling. The brewhouse should not exceed it, and the fermenter count should match it.

The Expansion Question

A system sized for year-one sales will be too small in year two. The question is how to handle that growth without replacing the core equipment.

Choose a brewhouse that accepts additional vessels. Choose a glycol chiller with spare capacity. Choose a control panel that accepts additional tanks. Run capped-off utility lines to empty floor space where future tanks will sit.

A brewery that plans for growth pays for growth when it happens. A brewery that does not pays for a complete replacement instead.

Not sure what size beer brewing system your sales projections actually support? We calculate brewhouse size, fermenter count, and packaging capacity from your numbers. Leave a message below with your target weekly sales and beer styles, and we will send you a complete capacity plan.