Hi,

In Odoo 18 SaaS, you can calculate the price based on the area by creating a computed field. The formula for this field is,

x_area_price = x_weight * x_height * price_unit. 

Here, x_weight represents the width of the product, x_height represents the height, and price_unit refers to the unit price of the product on the sales order line. This calculation first determines the area by multiplying the width and height, then multiplies the area by the product's unit price to compute the subtotal. The computed field will automatically update and can be displayed on the sales order line, ensuring accurate pricing based on the product's dimensions.

Hope it helps