估算计算器 — 公式

## How to Estimate Material Costs

### Formula

**Total = Quantity x Unit Cost x (1 + Waste%/100) x (1 + Markup%/100)**

Waste factor accounts for cuts, breakage, defects, and installation waste. Markup covers your profit and overhead on materials.

计算示例

500 square feet of tile at $12/sq ft with 10% waste and 25% markup.

  1. Base material cost = 500 x $12 = $6,000
  2. Cost with 10% waste = $6,000 x 1.10 = $6,600
  3. Total with 25% markup = $6,600 x 1.25 = $8,250
  4. Quantity to order = 500 x 1.10 = 550 sq ft