https://woocommerce.com/products/measurement-price-calculator/

Use the quantity calculator for products based on known product measurements (i.e. box of tiles)Use the pricing calculator for products priced and sold by the unit: foot, square meter, cubic yard, etc (i.e. garden mulch by volume, wallpaper by area)Product prices can be displayed per unit (e.g., “$1.75 / ft”, “from $3 / sq m”) in shop and on product pagesPricing calculator inventory support: product inventory can be managed “per unit”Pricing calculator dynamic weight: product weight can be set/calculated “per unit” for shippingPricing calculator pricing table: set price breaks based on simple product measurement rangesCalculators available for all physical attributes: dimensions, area, surface area, volume, or weightArea, volume, perimeter, and surface area calculators all allow simple inputs, or entering length, width, and heigh independentlyUse any combination of unitsWhen allowing user-defined inputs, optionally include an overage estimate automaticallyCustomize measurement and pricing labelsSet minimum and maximum values or the accepted step / increment on customers’ entered measurementsVariable products supported for per-unit pricing, shipping weight, and inventorySpecial “Room Walls” calculator for selling wallpaper

Changelog

* Fix - Resolve an issue with variable products and decimal comma separator where the incorrect default empty values would be saved for variations

* Fix - Ensure that pricing calculator products are considered in stock when they have a stock quantity greater than 0 but lower than 1

* Fix - Do not allow user-defined negative input values when accepting free-form customer input