Roofing estimate calculator
Measure by footprint and pitch or by squares, choose the material, and add tear-off, decking, disposal, and permit. Switch to contractor mode to turn the market price into a bid.
Price a roofing jobRemodeling Estimate Calculator for Contractors
Price roofing and addition jobs faster. Each calculator below starts from state and metro labour rates and published installed-price ranges, then switches into a bid builder where you set your own labour, materials, overhead, and profit. When the numbers look right, print a clean estimate for your client.
Home addition estimate calculator
Price bump-outs, rooms, primary suites, second stories, garages, and sunrooms by square foot and finish level, with systems, design, and permit add-ons.
Price an additionHow the bid builder works
- Market check. The calculator shows a low, typical, and high installed price for the job, adjusted for local wages.
- Direct cost. Contractor mode backs your overhead and profit out of the typical price to prefill labour and materials. Replace them with your crew hours × loaded rate and your supplier quotes.
- Overhead and profit. Overhead is added as a percentage of direct cost, then profit is applied on top. The tool shows both the gross margin and the total markup so you do not confuse the two.
- Range check. Your bid is compared with the local range, so you can see whether you are priced below the market or need to explain a premium.
- Print. Add your business name, the client, and the job address, then print or save the estimate as a PDF.
Markup vs margin
Markup is measured against cost; margin is measured against the selling price. A 25% markup on a $10,000 direct cost gives a $12,500 price, which is a 20% gross margin. Pricing with the margin you need, rather than the markup you remember, protects you when overhead rises.
| Markup on cost | Gross margin |
|---|---|
| 15% | 13.0% |
| 25% | 20.0% |
| 33.3% | 25.0% |
| 50% | 33.3% |
What to put in a written estimate
- A clear scope: materials, quantities, and what is excluded.
- Who pulls the permit and whether inspections are included.
- Allowances for items the client still has to choose.
- Payment schedule tied to milestones, plus how change orders are priced.
- How long the price is valid, since material costs move.
Rates and ranges come from public wage data and published cost guides. See the methodology. These tools are for planning; check your own costs and local code before you sign a contract.