Free tools Inventory
Take each material you hold, divide it by the amount one finished unit consumes, and keep the smallest answer. That number is how many products your inventory currently supports. Repeat per product if you make several, remembering that shared materials mean the totals cannot all be achieved at once.
Units from inventory = minimum of (stock ÷ per unit usage) across all required materials
A candle uses 200 g wax, 20 ml fragrance, 1 wick and 1 jar. Stock is 18,000 g wax, 900 ml fragrance, 400 wicks and 120 jars.
Result. 45 candles. The shelf looks full of wax and jars, but fragrance oil decides the number.
List what you hold and what one unit consumes. The calculator converts inventory into output and ranks the materials so you can see how close the next constraint is.
200 g per unit90 units possible
20 ml per unit45 units possible
1 pcs per unit400 units possible
1 pcs per unit120 units possible
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.
A stock report in money says nothing about output. Two producers with identical inventory value can have wildly different capacity depending on how balanced their materials are against their recipes.
The conversion from inventory to units is the missing step in most small business inventory tools, which stop at quantities on hand. It is the step Makeable exists to automate.
When products share materials, per product capacity numbers overlap. You cannot make the maximum of both. Decide the split by margin, by customer commitment, or by what sells fastest, and deduct as you commit.
The safe habit is to treat accepted orders as consumed stock immediately, so the remaining capacity figures never double count the same jar of wax.
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.
Divide the stock of each material by the amount one finished unit needs, and take the lowest result. That single division per material is the whole conversion.
Exactly the minimum ratio across your materials, rounded down. The calculator on this page does it for as many materials as your recipe contains.
Makeable does. It stores your materials and recipes, keeps stock current as orders arrive, and recalculates capacity and bottlenecks automatically rather than on request.
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.