Inventory Calculator

Work out what your stock is worth, how fast it turns over, and when to make or order more.

Stock at the start of the period

Units on hand at the beginning. Leave at zero to use only the closing stock.

Stock on hand now

Units of finished goods you are holding right now.

Units sold in the period

Total sold over the period you are measuring, usually a year or a quarter.

Days in the period

Three hundred and sixty five for a year, ninety for a quarter.

Cost to make one unit

Materials, labour and overhead. Not the selling price.

Selling price per unit

Lead time to restock

Days from deciding to make or order more to having it ready to sell. Zero when you make to order instantly.

Safety stock

Extra days of cover for a busy spell or a slow delivery. Two weeks is a fair buffer for a small maker.

Reset

Free calculator by Handcraft worked examples and methodology No account, nothing stored.