Batch Cooking Savings Calculator

Batch cooking means preparing several portions in one session rather than one meal at a time. The money comes from two directions. Ingredients bought and used at volume cost less per portion than the same ingredients bought for a single meal, which is economies of scale operating at the scale of a kitchen. And a portion already made is a portion that does not get replaced by something bought when the evening runs short.

The time side works the same way but is not counted here. One session produces several meals, so the fixed part of cooking, heating the oven and chopping and washing up, is paid once instead of once per meal, while the marginal work of making four portions rather than one is small. The calculator prices only the food, so whatever the time is worth to a given household sits outside the answer entirely.

How to use it

Enter what a single freshly cooked meal typically costs you, what one portion costs when the same dish is made in bulk, how many batch portions actually get eaten in a week, and how many weeks a year the pattern holds. The third figure is portions eaten rather than portions made, since anything cooked and then thrown away is a cost rather than a saving.

What the result means

The annual figure is the per-portion gap multiplied by how many portions the year contains. The per-meal saving shown beneath it is the more portable number, because it survives a change in how often you cook: at the defaults it is 3.00, and that gap rather than the headline is what the whole result rests on.

A worked example

Take a fresh meal at 6 and a batch portion at 3, eight portions a week, 48 weeks: the gap is 3.00 a portion, 24.00 a week, and 384 portions across the year, giving 1,152.00.

What moves the number most

The two cost inputs matter only through their difference, so cutting the Batch Portion Cost by 1 and raising the Individual Meal Cost by 1 have identical effects, each adding 384 to the year. Volume scales whatever that gap is: at a 3.00 gap, one more portion a week adds 144 a year, and dropping from 48 weeks to 40 removes 192. Where the gap is small, no amount of volume rescues the total.

The formula behind this

The per-portion saving is the fresh cost minus the batch cost. That figure is multiplied by portions a week and then by weeks a year. Nothing else enters it, which is why a batch portion that costs more than the fresh one produces a negative total rather than an error.

What caps how far ahead you can cook

Storage is the real limit on batch size, not arithmetic. Cooked food keeps for a matter of days refrigerated and considerably longer frozen, so the practical ceiling on a session is how much freezer space is available and how much repetition a household will tolerate. The World Health Organization sets out general food-safety principles for cooling, storing and reheating; specific storage times vary by dish and by national guidance, which is worth checking locally rather than assuming.