BuildMetricLab

Editorial & Methodology Policy

Last updated: 24 June 2026

BuildMetricLab exists to give US homeowners, DIYers, and licensed trade professionals accurate, no-nonsense quantity and cost estimates for common construction tasks.

Principles

  1. Show your work. Every calculator displays the exact formula used. If you don't agree with the method, you can reproduce the calculation by hand.
  2. Cite the source. Where a calculator depends on industry benchmarks (e.g., bricks per ft², density, R-values per IECC, pounds of concrete per cubic foot) the reference is listed under Sources & Methodology on the tool page.
  3. Estimates, not promises. We include standard waste factors and mark clearly where site conditions invalidate a number. We do not claim exactness the numbers cannot deliver.
  4. No sponsored output. Affiliate partners have zero influence on calculator formulas, defaults, or recommendations.
  5. Versioned math. When we update a formula, the tool's last_updated date changes and the change is recorded in the site changelog.

How we source prices

Default unit prices reflect typical US national-average building material and contractor rates for the publication date noted on each tool. Pricing varies meaningfully by region (Northeast vs Mountain West), by lumber and steel market, and by job size. Every price field is editable so you can plug in your own quote.

Codes and references

Where a calculator references a building code (IRC, IBC, IPC, IMC, NEC, IECC), we use the most recent published edition unless noted. Local code amendments override the model code — your authority having jurisdiction (AHJ) is the source of truth.

Contributor sign-off

All calculators are reviewed before publication for:

Corrections

Email contact@brightscalelabs.com or use the feedback button on any tool page. We aim to respond within five business days.