🎨 Estimate Materials for a Job

I either buy too much material or make a second trip. Build me a material quantity calculator. Keep a materials project where each material has a coverage rate such as square metres per litre or per box, a pack size, a unit cost and a default waste percentage. Let me enter the measurements for a job, whether that is area, length or volume, choose the materials, and get the quantity needed including waste, rounded up to whole packs, with the cost of each line and a total. Produce it as a shopping list I can take to the merchant. Save each job with the estimated quantity and let me record what was actually used. Add an AI agent that compares a new estimate against similar completed jobs and warns me when a quantity looks well outside the normal range. Automate a scheduled monthly review of estimated against actual usage so my waste percentages can be corrected from real data. Two logins: an estimator who runs calculations, and an owner who maintains coverage rates and prices.