FormulaPrice: Price by Formula

Let shoppers enter a size, and charge them the price your formula works out.

Sell what cannot be listed as variants. The shopper types a width and a length, picks a finish, uploads artwork — and the price updates as they type, from a formula you wrote. Start from a template: length, weight, area, whole boxes, volume, surface area. Each prices against the product's own price, so $20 on the variant means $20 per metre. The price is not taken from the page: checkout recalculates it from the shopper's own measurements, so an edited page cannot change what anyone pays.

• Price by length, area, volume, weight or whole boxes
• Live price on the product page as the shopper types
• Swatches, dropdowns, file uploads and conditional fields
• Add-ons become real products on the order, with their own stock
• Show a monthly figure without changing what is charged