How to calculate materials for small-batch production
Planning a batch is more useful when it tells you what you need to buy, as well as what the recipe consumes. The key is to use consistent units and combine shared materials before deciding what to reorder.
Write the recipe for one clear output quantity
Choose whether your recipe describes one finished product or a defined batch. Record each component, its quantity and its unit. Include packaging that is consumed when the product is made or prepared for sale, such as a jar, wick, lid or carton.
For a candle that uses 150 g of wax, one wick and one jar, a run of 20 requires 3,000 g of wax, 20 wicks and 20 jars. If your recipe is recorded for ten candles instead, scale it by two rather than multiplying every figure by 20.
Convert compatible units before adding them
Grams and kilograms can be converted into one weight total; millilitres and litres can be converted into one volume total. Weight and volume are not interchangeable without additional information about the material. Keep metres, units and operating durations separate too.
Use the same material record when two recipes use the same ingredient. Slightly different names such as “soy wax” and “wax, soy” can otherwise hide a shared requirement and lead to duplicate orders.
Combine the recipes before placing an order
Suppose you plan 20 candles using 150 g of wax each and ten larger candles using 250 g each. The combined requirement is 3,000 g + 2,500 g = 5,500 g. If 3,200 g of eligible wax is available, the shortage is 2,300 g.
Now check how the supplier sells it. If the smallest suitable pack contains 1 kg, three packs cover the shortage and leave 700 g before allowing for any real process losses. Use your own recipe and supplier pack sizes; these figures are illustrative.
Check which stock can actually be used
A total on hand is not always a total available for production. Check batch status, expiry information and material suitability. Held or recalled stock should not silently reduce the amount you need to order.
InventoryOS Manufacturing records materials, batches and storage areas. Its recipe calculator combines shared ingredient requirements and can send shortages to Reordering. The calculation does not reserve material stock or complete a production run.
Keep planning, receiving and production separate
A proposed order is not a delivery, and a planned batch is not finished stock. Record what was received, including partial deliveries, before relying on it for production. Review the materials and source batches, then confirm production when it is actually complete.
Product-ready and cleaning timers can store deadlines while you are logged out. A timer reaching its deadline does not prove a product is ready or that maintenance has been performed; those actions still need confirmation.
Try the workflow with one familiar recipe
Manufacturing mode is included in the InventoryOS Business plan and is off by default. Enable it in workspace Settings, then set up a material and recipe you already understand. Compare the calculated quantities with your usual working sheet before planning more recipes.
Explore manufacturing tools or read the recipe-planning guide. To request one free week of Business, create an account and email [email protected]. We activate trials manually; they do not automatically begin a paid subscription. Optional recipe email summaries require the separate reorder email add-on.