Free tools Requirements
Convert the recipe to a per unit amount by dividing each batch quantity by the batch yield, then multiply every per unit amount by the number of units ordered. Subtract the stock you already hold to get the purchase list. The result is a complete ingredient requirement, not an estimate.
Ingredient required = (batch amount ÷ batch yield) × units ordered; to buy = required − stock
A soy candle batch of 12 uses 2,400 g wax, 240 ml fragrance, 12 wicks and 12 jars. You need 150 candles and hold 18 kg wax, 900 ml fragrance, 400 wicks and 120 jars.
Result. Three purchases stand between you and 150 candles, and wicks need no action at all.
Enter the batch recipe, the batch yield and the number of units you need. The calculator returns per material requirements and the exact quantity to order for anything short.
200 g per unit30000 g needed for 150short 12000 g
20 ml per unit3000 ml needed for 150short 2100 ml
1 pcs per unit150 pcs needed for 150enough in stock
1 pcs per unit150 pcs needed for 150short 30 pcs
This runs entirely in your browser and nothing is saved. Makeable keeps the same calculation running against your live stock, so it re-answers itself every time an order arrives. Start free or read how to calculate production capacity.
Capacity asks what your stock allows. Requirements ask what a target demands. The two use the same recipe data in opposite directions, which is why a business that can answer one can usually answer both from the same numbers.
Working from requirements is the right direction when the quantity is fixed, for example a wholesale order or a market stall you always stock the same way.
Purchasing by habit produces the classic small producer inventory profile: too much of the cheap things, never quite enough of the one that matters. A requirement list flips this, because it is derived from what you are actually committed to making.
Where suppliers sell in fixed pack sizes, round the purchase up to the next pack and record the surplus as stock rather than as need.
Makeable is production capacity and inventory planning software for small businesses that make physical goods from recipes or bills of materials. It stores your materials and recipes, keeps stock current as orders arrive, and runs the calculation on this page continuously rather than on request, so the answer to "can I make this?" is always current.
You can start on the free plan with three products and fifteen materials, see how the production engine works, or compare plans and limits.
Requirement minus stock. Multiply the per unit amount by the ordered quantity to get the requirement, subtract what is on the shelf, and round up to your supplier's pack size.
The method is identical to a recipe: per unit quantity from the bill of materials multiplied by the number of finished units, minus stock on hand. Multi level BOMs need the same calculation applied at each level.
Yes, if it is predictable. Add the typical waste percentage to the per unit amount, so a 200 g pour with 5 percent loss is entered as 210 g.
For information and estimates only. Makeable's formulas, batch limits and margin calculations are mathematical estimates based on your inputs. They are not certified accounting, financial, pricing or tax advice. You are solely responsible for setting your own wholesale and retail prices, ensuring profitability, and checking cost calculations before committing money.