Our review board includes licensed engineers, contractors, and trade specialists with real-world field experience.
They review calculators for formula accuracy, assumption quality, practical usability, and clear explanation of limitations.
Each reviewed calculator includes the reviewer’s name and a last-reviewed date so readers can quickly understand who checked it and when.
Updated regularlyPage last updated: 15 Apr 2026
Review Policy
Our review process is designed to improve trust, not just presentation. Reviewers evaluate the calculations, instructions,
assumptions, and real-world relevance of each tool in their area of expertise.
Independence: Reviewers are experienced practitioners. Conflicts of interest must be disclosed before review.
Scope: Reviews cover formula accuracy, realistic defaults, plain-language clarity, and practical project limitations.
Cadence: Calculators are reviewed at least annually, or earlier when standards, material practices, or common assumptions change.
Change tracking: Significant updates are documented and reflected in the calculator’s reviewed date where applicable.
How Reviews Actually Happen
1
Initial calculator build
Each tool starts with standard formulas, unit conversions, and documented assumptions relevant to the project type.
2
Expert review
A reviewer with field experience checks whether the math, defaults, waste factors, and instructions reflect how the work is actually estimated.
3
Practical validation
We compare calculator outputs against realistic project scenarios to confirm the results are useful in real planning situations, not just correct in theory.
4
Revision and clarification
Any issues found during review are corrected. We also update notes, guidance, and assumptions so readers can understand where an estimate may vary.
5
Freshness and re-review
Reviewed tools are revisited over time to keep the content aligned with current practices, common material assumptions, and site quality standards.
Review Freshness
Review dates are shown on calculator pages and on this board so readers can judge freshness at a glance.
We aim to keep all reviewed calculators current, and we prioritize re-reviews when construction practices, product assumptions,
or estimation norms change.
What the date means
The review date reflects the most recent quality check by the listed reviewer or editorial team for that calculator set.
When we update sooner
We may update before the annual cycle if we revise formulas, refine assumptions, improve instructions, or add major new calculator features.
Scheduled for regular re-review as formulas, assumptions, and guidance are updated.
Maria is a licensed civil engineer with 12+ years in residential foundations and flatwork.
She reviews our concrete calculators for realistic yields, reinforcement assumptions, and the clarity of project guidance.
ConcreteFootingsRebar
Reviewer contributions
Checks volume formulas, thickness assumptions, and unit conversions
Reviews reinforcement guidance for realistic residential scenarios
Helps clarify where site conditions may change final material needs
Recently reviewed and aligned with current site assumptions and estimator guidance.
Dave is a second-generation paving contractor focused on asphalt compaction, lift thickness, milling yields,
and driveway planning for residential and light commercial jobs.
AsphaltMillingCompaction
Reviewer contributions
Verifies pavement thickness assumptions and compaction-related estimating logic
Reviews driveway and milling calculations for realistic material yield expectations
Helps ensure planning notes reflect how contractors scope smaller paving jobs
Due for another routine review as part of our ongoing freshness cycle.
Sonia reviews our lighting and electrical calculators, validating spacing guidance, fixture density,
and the clarity of planning notes for home lighting layouts.
LightingElectricalCode
Reviewer contributions
Checks spacing and layout assumptions for practical residential lighting use
Reviews whether calculator guidance is understandable for non-experts
Flags areas where final installation decisions should be confirmed by a licensed professional
Recently reviewed and checked against current estimating logic and waste factor guidance.
Caleb validates roofing calculations for shingle coverage, roof takeoff logic, waste factors,
and estimation guidance for common residential roof shapes.
RoofingTakeoffVentilation
Reviewer contributions
Checks waste factors and roof geometry assumptions for realistic takeoffs
Reviews square footage and pitch logic for clarity and accuracy
Helps identify where simplified estimates may differ from full site-specific measurements
Set for routine review as product assumptions, application guidance, and coverage standards evolve.
Natalie reviews our paint-related calculators to make sure coverage rates, coat assumptions,
and planning notes reflect real-world preparation and application conditions. She is also an
avid gardener and contributes to reviewing our outdoor calculators, including tools like the
mulch calculator, ensuring they reflect practical landscaping and garden planning needs.
PaintCoverageSubstrate Prep
Reviewer contributions
Checks paint coverage assumptions against practical residential use cases
Reviews guidance around coats, prep work, and surface variability
Helps explain why actual product needs may differ across rooms and substrates
Reviewed within our standard cycle and revisited when framing assumptions or calculator notes change.
Liam reviews our decking, lumber, staircase, and board foot calculators to confirm that framing takeoffs,
spacing assumptions, and waste considerations are practical for real projects.
DeckingFramingStairs
Reviewer contributions
Checks framing and lumber takeoff logic for practical build planning
Reviews waste assumptions for deck boards, cut lengths, and stair layouts
Improves clarity so readers understand where a quick estimate stops and detailed site planning begins
Our calculators are designed to provide useful estimates for planning purposes. They do not replace site measurements,
product documentation, engineering input, code review, or professional contractor advice. Material needs, waste, layout,
structural requirements, labor scope, and final pricing can vary based on local conditions, manufacturer specifications,
installation methods, and project complexity.
Always confirm final requirements with a qualified professional before ordering materials, approving plans, or beginning construction.
Interested in Joining the Review Board?
We welcome experienced practitioners who can provide transparent, practical feedback on calculators and educational content.
At least 5 years of field experience or a relevant professional credential
Willingness to disclose conflicts of interest
Comfort reviewing calculations, assumptions, and plain-language instructions
Contact us with the subject line “Reviewer Application”.
