How much to can: Working it out from your own records

Updated October 17, 2026

To work out how many jars to can per person, start with the home-canned food your own household ate over a season. Keep products and jar sizes separate, note gifts and discarded jars, and check what remains. A per-person average can describe last year’s use, but you choose how much to make next.

How many jars of tomato sauce will you actually use next year? A list from someone else’s kitchen can give you a number, but it can’t tell you whether your family eats pasta twice a week or hardly ever.

Your own records are more useful. Look at what you opened, what ran out early, and what’s still waiting on the shelf. The broader canning plan can include produce and recipe notes; here, we’re working out quantities from the jars you used.

Count what your household ate

For each product and jar size, record how many jars you started with, how many you added, and how many remain. The difference tells you how many left your inventory during that period.

Then account for gifts and discarded jars. If 12 jars of jam left the shelf but 4 were gifts, your household ate 8. Keep those gift jars in mind if you’d like to give a similar number away next year.

A canning inventory makes this easier when you update it as jars are used. Keep pints and quarts separate so a change in jar size doesn’t look like a change in how much food you ate.

Reading an example season

These are the same example records used in the canning planner guide. The household has four people, each product is shown in one jar size, and none of these jars were gifted or discarded.

The household used all 14 quarts of tomato sauce. Dividing 14 by 4 gives 3.5 quarts per person for that season. That’s an average from this example, rather than a quantity to follow in your kitchen.

It also leaves a question unanswered: when did the sauce run out? If it was gone halfway through winter, the record doesn’t capture the jars the household would have liked to open afterward.

The pickles tell a different story. Only 3 of the 10 pints were used, leaving 7 on hand. Before making another batch, the household could look at why the pickles weren’t chosen and how many it still wants.

Those notes help you interpret the counts. A new favorite recipe, fewer people at home, or plans to give more jars away can all change what you want to make.

Allow for jars you already have

When you’re planning the next season, include the remaining jars in what’s on hand. The example household has 9 pints of green beans before it makes any more.

Keep the processed dates with those counts so you can distinguish the batches. Questions about the food or canning instructions belong with your safe and tested recipe and its source, such as the National Center for Home Food Preservation. The inventory records quantities and dates.

Starting without a full season of records

Count the jars you have today and save that as your opening inventory. Add new batches as you make them, then subtract jars as you open them, give them away, or discard them.

At the end of the period, opening inventory plus new jars minus remaining jars tells you how many left. Subtract gifts and discarded jars to see what your household ate. If some of the figures are estimates, mark them that way.

Even a few months of records can help you notice what you’re reaching for. A longer record lets you compare across seasons without depending on memory.

Where The Cantry helps

In The Cantry, logging a batch adds its jars to your inventory, and marking jars used updates the count. Gifted and discarded are optional reasons you can attach to that action.

Canned, used and remaining figures come from your records, so you can look back at a product without adding up every batch by hand. What you make next is still your choice.