Scope
What this policy covers
This policy applies to calculator interfaces, formula explanations, A1C and blood sugar charts, laboratory-testing guidance, FAQs, metadata, structured data, internal links, trust pages, and material updates on A1CCalculator.us. It covers both visible content and technical behavior that can change how a reader understands a result.
The site publishes educational tools for A1C, estimated average glucose, Glucose Management Indicator, Time in Range, and related units. These topics sit close to medical decisions, so numerical accuracy is only one requirement. A correct calculation can still mislead if the input label is vague, a measured value is called an estimate, a diagnostic threshold is presented as a personal target, or an important exception is hidden.
The editorial objective is to help readers identify the source metric, choose the right tool, retain the unit and date, understand the output’s scope, and know when clinical interpretation is required. Search visibility, word count, and conversion goals do not override those requirements.
Source hierarchy
Sources are chosen for authority, relevance, and proximity to the claim. For calculator equations, preference goes to the original peer-reviewed publication or the standards organization responsible for the relationship. The A1C/eAG pages cite the ADAG study; GMI cites its original Diabetes Care paper; HbA1c unit conversion cites the NGSP master equation.
For diagnostic tests and public-facing health information, US government sources such as NIDDK and CDC are preferred. FDA material is used for device safety and meter technique. Current professional standards may support treatment-target examples, special-population context, and terminology. Official provider pages support changing operational information such as lab locations or services.
A domain suffix alone does not make a source suitable. A general organization page cannot support a precise formula, price, turnaround time, insurance guarantee, or product-performance claim. Secondary articles may help discover a topic, but central medical and mathematical claims should link to the most direct primary or authoritative source available.
| Claim type | Preferred source | Example |
|---|---|---|
| Formula | Original paper or standards body | ADAG, GMI paper, NGSP |
| Diagnosis/testing | Government clinical resource | NIDDK, CDC |
| Current clinical targets | Current professional standard | ADA Standards of Care |
| Device safety | Regulator or device instructions | FDA, manufacturer IFU |
| Location/service | Official provider page | Provider locator |
Formula and calculator quality assurance
Before a calculator is treated as ready, the equation is compared character by character with the cited source. The review includes coefficients, signs, order of operations, conversion factors, units, input direction, output precision, and valid range. Common values and boundary values are checked independently.
The interface review asks whether a reader can distinguish A1C percentage, HbA1c mmol/mol, glucose mg/dL, glucose mmol/L, mean CGM glucose, and Time in Range percentage. Fields and outputs should name the metric rather than show a bare number. Invalid or incomplete input should not quietly become a plausible medical result.
Results must be described according to their origin. eAG is derived from A1C. A reverse ADAG result is an estimated A1C, not a laboratory assay. GMI is calculated from CGM mean glucose and should not be relabeled as A1C. Time in Range duration is arithmetic based on the user’s reported percentage and range definition.
Writing and editing standards
Content should answer a specific reader question in plain US English. Headings should describe the subject rather than use vague marketing language. Definitions appear before exceptions. Tables should identify whether values are measured, calculated, diagnostic, or typical treatment examples. Related pages must have distinct intent rather than repeat the same paragraphs with a different keyword.
The site avoids absolute claims such as “perfectly accurate,” “medical grade,” “ADA certified,” or “guaranteed” unless a precise, verifiable basis exists. It does not invent clinical verification, partnerships, laboratory availability, prices, insurance coverage, turnaround times, credentials, testimonials, or patient outcomes. Brand names do not imply endorsement or affiliation.
Medical topics require calibrated language. “Many nonpregnant adults” is more accurate than “everyone.” A screening threshold is not called an automatic diagnosis. A general target is not presented as an individual prescription. Relevant exclusions—such as pregnancy, altered red-blood-cell turnover, incomplete CGM data, or severe hypoglycemia risk—are stated where they change interpretation.
Content is edited for natural flow and specificity. Repetitive introductions, generic summaries, formulaic transition phrases, and padded sections that do not help the reader should be removed. A page may be long because the topic needs context, but length is not itself evidence of quality.
Automation and human responsibility
Software may assist with calculations, code checks, consistency searches, drafts, formatting, or identifying pages that need review. Automated output is not accepted as evidence and should not be published solely because it sounds confident. A responsible human publisher remains accountable for checking facts, formulas, citations, claims, tone, privacy, and the live user experience.
No automation tool should invent a medical reviewer, author experience, patient story, testimonial, statistic, source, quote, partnership, or local business listing. Generated city pages and minimally varied location content are not part of the directory strategy. When automation introduces generic or repetitive language, the content should be rewritten or removed.
For medical content, source verification occurs against the linked authoritative material rather than another generated summary. If a claim cannot be verified or properly scoped, it is narrowed, attributed, or omitted.
Review labels and authorship
A “reviewed” date on A1CCalculator.us currently represents an editorial and technical source check. It does not mean a physician or other licensed clinician reviewed the page unless that person is named and the site provides independently verifiable credentials, relevant scope, contribution, review date, consent, and conflict disclosure.
Authorship and review are separate roles. A writer may organize and explain the evidence; a technical reviewer may test the formula and interface; a clinical reviewer may assess medical context and safety. The site should not combine these roles into a vague “medical board” claim.
The current clinical-review status and requirements for any future reviewer are published on the Review Standards & Reviewer Disclosure page. If a named reviewer is later added, material changes made after that review require re-review before the old reviewer label can continue to apply.
Updates and re-review triggers
Pages are not considered current merely because an automated date changes. Review is triggered when a central source or professional guideline is updated; a formula, unit, threshold, device term, or safety recommendation changes; a broken source prevents verification; user feedback identifies a material ambiguity; or a significant redesign changes how input or output is presented.
Time-sensitive claims require extra care. Laws, insurance rules, provider services, prices, software behavior, and clinical standards can change. These claims should be verified near publication, described with an “as of” date when useful, and removed if the site cannot maintain them reliably.
A material review updates the displayed review date. Minor spelling, spacing, or non-substantive accessibility fixes do not necessarily need a public correction entry. A change log should be used when a prior statement could have materially affected interpretation or action.
Corrections policy
Readers can report an error through the contact page. Useful reports include the page URL, exact text or calculator behavior, input and output used to reproduce the problem, browser or device where relevant, and a primary source supporting the concern.
Corrections are prioritized according to potential harm. Medical-safety instructions, formulas, unit conversion, input validation, privacy exposure, accessibility blockers, false credentials, and misleading affiliations take priority. Broken links, metadata, copy clarity, and visual issues follow according to impact.
When a material error is confirmed, the goal is to correct the live page promptly, check related pages and reused components, update structured data or metadata where needed, and record the meaningful change. Removing content is acceptable when a reliable correction is not yet available.
Independence, advertising, affiliates, and conflicts
A commercial relationship must be disclosed where it could affect how a reader evaluates a recommendation or link. Sponsored content should be labeled. Affiliate links should be identified near the relevant content. Compensation, free products, ownership, employment, or another material conflict involving an author or reviewer should be disclosed.
Advertisers, sponsors, affiliate programs, and laboratory brands do not receive authority to change equations, thresholds, safety warnings, or editorial conclusions. If a commercial partner is involved in a page, the relationship and the partner’s role must be clear. A plain external link does not itself establish a partnership.
The site currently links to official Quest Diagnostics and Labcorp location tools as public resources and explicitly states that it is independent of those providers. It does not reproduce unverified local listings or claim appointment availability. Advertising and cookie practices are described in the applicable Privacy Policy and Cookie Policy.
Medical boundary
A1CCalculator.us does not provide medical diagnosis, individual targets, emergency assessment, or medication dosing. Editorial review cannot account for a reader’s symptoms, pregnancy, diabetes type, treatment, kidney function, hypoglycemia risk, red-blood-cell conditions, or device instructions.
Pages should direct readers toward qualified care when interpretation could change treatment, when results conflict, or when special circumstances affect accuracy. Severe symptoms and inability to self-treat require the person’s emergency plan and immediate medical help, not an online calculation.
Accessibility and reader feedback
Editorial quality includes whether information can be used. Tables need headings and horizontal overflow on small screens. Controls need labels, keyboard access, visible focus, and understandable error messages. Color should not be the only way a range is identified. Links should describe their destination.
Feedback about confusing wording, mobile layout, screen-reader behavior, color contrast, calculation steps, missing context, or a source is treated as editorial input. Accessibility problems that block use of a calculator or critical safety information are handled as high-priority defects.
Request a correction
Include the affected URL, exact wording or behavior, why it may be wrong, and the strongest source you have.
Send editorial feedbackPolicy version
Effective and reviewed August 15, 2026. This policy replaced broad, unverifiable guarantees with operational standards that reflect the current site. See About A1CCalculator.us, Review Standards, and the Medical Disclaimer.