Editorial Guidelines

Core Principles

1. Accuracy: All our content is verified and based on industry-standard formulas and up-to-date pricing data.

2. Transparency: We clearly state our sources and any assumptions made in our calculators.

3. Objectivity: Our guides are written without bias, aiming solely to help users plan their projects effectively.

4. Regular Updates: We review and update pricing data annually to ensure our cost estimates remain relevant.

How Our Calculators Work

Every volume figure on this site comes from the same arithmetic a contractor uses on site. Slab and flatwork volume is length × width × thickness, converted to cubic yards by dividing cubic feet by 27. Round pours such as Sonotubes use 0.7854 × diameter² × depth. Bag counts assume published yields of 0.60 cubic feet for an 80 lb bag, 0.45 for a 60 lb bag, and 0.30 for a 40 lb bag.

We apply a 10% waste allowance by default, because forms leak, subgrades are uneven, and running short mid-pour leaves a cold joint that cannot be undone. Where a ready-mix order falls under roughly three cubic yards we flag the short-load fee that suppliers add to cover sending a truck out, because it is the single most common surprise on a small concrete bill.

Where Our Pricing Comes From

Our 2026 baseline figures are built from published ready-mix and materials pricing, producer price index data for cement and concrete products from the U.S. Bureau of Labor Statistics, and technical guidance from industry bodies including the National Ready Mixed Concrete Association, the American Concrete Institute, and the Portland Cement Association. Bagged-mix yields follow manufacturer published figures.

City pages apply a regional cost index to the national baseline rather than quoting a local supplier. Each page states the index it uses, so you can see whether a market is above or below the national average and by how much.

What Our Estimates Do Not Include

These are planning estimates, not quotes. Our figures cover concrete, typical finish work, and prevailing labour rates. They do not price excavation and haul-away, demolition of existing concrete, difficult site access, thickened edges or footings, vapour barriers, permits and inspections, engineered reinforcement, or decorative work beyond the finish you select.

Any of those can move a real quote substantially, which is why we publish ranges rather than single numbers. Structural work — footings, retaining walls above about four feet, and anything carrying a building load — should be confirmed against stamped plans or a licensed engineer before you order material. Always collect at least two local bids before committing.

Updates and Corrections

Cost guides carry a visible last-updated date and are reviewed at least annually, and sooner when materials pricing moves sharply. Our current pricing baseline is dated June 2026.

If you believe a figure or formula on this site is wrong, tell us and we will check it. Where a correction is warranted we change the page and move its last-updated date. We would rather publish a corrected number than defend a stale one.