FirstBuy AI

How many units should you order for a new product with no sales history? All calculations run locally in your browser.

Your new product

Sector / product category

Launch monthSeasonality is applied from this month onwards

Selling price (€)

Purchase cost (€)

Comma or dot decimals both work

Expected demand (units/week)

How certain is that estimate?

Lead time (weeks)

Review time (weeks)How long until you would reorder

Extra safety period (weeks)Optional buffer on the coverage horizon

MOQ (units)

Order multiple (units)Pallet or carton size, 1 if any quantity goes

Leftover sells at (% of cost)What you would get dumping leftovers to a liquidator — typically 10–40%. Editable: returns at 80% exist.

What this sector setting does

Launches like this one land between 51% and 197% of your weekly estimate over the first 26 weeks — that is the range the simulation will explore, not a hidden adjustment. Mild seasonality: a summer dip and a year-end push. An August launch starts about -20% against the yearly average in this sector.