How Much Clay Does a Studio Use? Inventory for Small Studios
Running out of clay on a Saturday morning is the studio owner's bad dream. So is ordering too much and tying up cash in boxes that dry out in the corner. A simple inventory habit prevents both.
Estimate clay use
Start with what you know:
- Members. How many wheels and active members?
- Classes. How many students, and how much clay does a typical class use? Our clay weight estimator helps size projects.
- Reclaim. How much scrap you recover and reuse.
- History. Your last three to six months of orders.
A rough method: count the clay bags used in the last month, divide by weeks and add a margin for growth. Over a few months, your own numbers beat any general rule.
Set reorder points
A reorder point is the stock level that triggers an order.
- Reorder point = average weekly use multiplied by the weeks your supplier takes to deliver, plus a safety margin.
- Raise the margin for slow suppliers or busy seasons such as before the holidays.
- Keep a small buffer of a staple clay so one late delivery never shuts you down.
What to track
- Clay bodies (by type and weight)
- Glazes (dry materials and mixed buckets)
- Underglazes
- Kiln supplies: kiln wash, stilts, cones
- Consumables: bags, tools, sponges
- Safety supplies: dust masks and gloves, if you stock them
Handle dry glaze materials with care. See PPE and mixing glazes correctly.
Inventory spreadsheet layout
Copy this into a spreadsheet.
| Item | Category | Unit | In stock | Reorder at | Supplier | Lead time | Last ordered |
|---|---|---|---|---|---|---|---|
| Stoneware, speckled | Clay | 12.5 kg box | |||||
| Porcelain | Clay | 12.5 kg box | |||||
| Clear glaze | Glaze | 5 kg bucket | |||||
| Kiln wash | Kiln | 1 kg | |||||
| Cones | Kiln | Box |
Check stock once a week at a fixed time and update the sheet. The habit matters more than the tool.
Count glaze buckets honestly
Glaze buckets are easy to forget until they are empty. Mark a level line on each bucket and log when it drops below it. Keep a record of recipes and batch dates. See weighing and mixing a glaze batch.
Link it to what members pay
Clay and glaze costs belong in your pricing. See how much to charge for a membership and how to charge firing fees.
Want this in your studio?
Claybook handles this for your studio: clay and glaze stock with reorder alerts, so you know before the shelf is empty.
Tell us how you run things today and we will tailor it to your studio. See everything we offer studios.