One person drafts the material guides on ConcreteCalcTools, and one person owns the site and signs off on the math. Both are named below, with what each of them actually checks.
Jessica Martinez
Contributing Writer, Construction & Materials
Jessica writes the material and cost guides on this site: how much concrete or gravel a project needs, slab thickness and cure time, footing math, and what a driveway or slab actually costs installed. Her job is to turn a published formula or a manufacturer spec sheet into a page a homeowner or a crew lead can use at the counter, with the arithmetic shown rather than hidden behind a single number.
On this site, her byline appears on How Much Concrete Do I Need?, Bags of Concrete Per Cubic Yard, Estimating Concrete for Footings and Sidewalks, How Thick Should a Concrete Slab Be?, How to Pour a Concrete Slab, How Long Does Concrete Take to Cure?, How Much Does a Concrete Slab Cost?, Concrete Slab Cost by Size (2026), How Much Does a Concrete Driveway Cost?, and How Much Gravel Do You Need for a Concrete Base?. She writes similar cost and materials guides for a handful of other sites in the Encore Editorial network.
Before a draft of hers goes live: every formula in the piece is checked against a second worked example by hand, not just read for internal consistency. A cited constant, a bag yield, an aggregate density, or a code minimum, is traced to the actual data sheet, extension bulletin, or code section named in the piece and dated to when that source was checked, not copied from a secondary blog. Worked examples use round, clearly labeled hypothetical dimensions so nobody mistakes a sample slab for their own project. Chris Terry (below) reviews the draft against these checks before it publishes and again whenever a cited source changes.
Chris Terry
Owner and Editor, Encore Promotional Products
Chris owns and operates ConcreteCalcTools and the other calculator sites in the Encore Editorial network through Encore Promotional Products. He builds and maintains the calculators, sets the sourcing standard laid out on the editorial standards page, and signs off on every formula and every cited constant before a page ships. He is also the person who reads the contact form when someone flags a wrong yield or coverage number.
What he checks: that a calculator's formula matches the published standard for that material (volume geometry for concrete and gravel, manufacturer bag yields for bagged mix, the International Residential Code for footing depth and stair rise), that every constant cited in a guide traces to a named data sheet, extension office, or code section rather than a rounded guess, and that a reported correction gets made and dated the same week, not queued.
How to reach us
Found a number that does not match your supplier's bag, a formula that does not match your local code, or a source link that has moved? Use the contact form. Messages go to Chris directly, and corrections to a published figure are made and dated on the page, not quietly changed without a trace.