How this is calculated
A project total is not a single material quantity. It is materials (with waste), labour, delivery or skip hire, and — for trades — markup. Keeping those lines separate makes it obvious which part of a quote you can check with a calculator and which part is labour.
The result is shown as a ±10% range because local rates and unforeseen work move the number. This tool does not look up regional prices; you supply the inputs from supplier quotes or from the material calculators on this site.
Formula & methodology
Materials with waste = Materials × (1 + waste %). Subtotal = materials with waste + labor + delivery. Total = Subtotal × (1 + markup %). Range = Total × 0.9 to Total × 1.1.
Worked example
Materials $2,400, labor $1,800, delivery $150, 10% waste, 0% markup
- 1.Materials with waste = 2,400 × 1.10 = $2,640
- 2.Subtotal = 2,640 + 1,800 + 150 = $4,590
- 3.No markup → planning total $4,590
- 4.Shown as a range: about $4,130 – $5,050
Frequently asked questions
Is this a substitute for a contractor's quote?
No. It is a way to organise numbers you already have so a quote is easier to compare. Structural work, permits, and site conditions are not priced here.
Should homeowners add markup?
Usually no. Markup is for a trade quoting a job. Homeowners can leave it at 0% and still add a contingency in the waste line or in a separate savings buffer.
How do I fill the materials line?
Run the relevant calculators (concrete, paint, flooring, and so on), note the estimated material cost on each, and add them together here.
Why show a range instead of one total?
A single figure looks more precise than a planning estimate is. A range makes it clear that local prices and extras will move the number.
Last updated 2026-08-01. Formulas are planning methods — confirm with a supplier before you order.