Editorial policy
BreezyCalc covers money and health questions, where a wrong number can cost someone real money or cause real worry. This page explains where our figures come from, how calculators and guides are checked before they go live, how often they are reviewed, and what to do if you find a mistake.
Who is responsible
Every calculator and guide is published by Muhammad Ajmal, a full-stack software engineer with more than five years of experience building production software, including billing and payment systems. He writes the calculator code, chooses the sources and approves each page before it is published.
He is not a doctor, financial adviser, accountant or lawyer. Our pages explain published rules, formulas and official guidance; they do not give personal advice.
Where the numbers come from
- Tax rates, thresholds and allowances come from primary government sources: the IRS and Social Security Administration for the US, HMRC and gov.uk for the UK. They are kept in one dataset, tax-rates.json, which names the source for each value, so a change is made once and every calculator picks it up.
- Health formulas come from official guidance and published equations: WHO and CDC for BMI categories, the Mifflin-St Jeor equation for calorie needs, and ACOG and NHS guidance for pregnancy dating.
- Money formulas such as loan amortization, compound interest and APR to APY are standard mathematics, written out on each calculator page.
Every calculator has a Sources section that links to the documents it relies on, and every guide links to the calculator that does the math.
How calculators are checked
- Each formula is tested against worked examples, from the source where it gives one, before the calculator is published.
- After any change to the site, every calculator is opened in a real browser to confirm it returns a result without errors.
- Calculations run on your device. Nothing you type into a calculator is sent to our servers.
How guides are written and reviewed
Guides answer one question in plain English, show a worked example and link to the matching calculator. Some guides are drafted with the help of AI writing tools. A new guide is treated as unchecked: it is published with a noindex tag, so search engines leave it out, until its figures, examples and claims have been checked against its sources.
Figures that change every year, such as tax thresholds and contribution limits, are either tied to the tax year they apply to or left to the calculator, so a guide does not keep repeating a number that has gone out of date.
Review dates
The "Last reviewed" or "Last updated" date on a calculator shows when its figures were last checked against the source, not when its wording was last edited. Tax figures are checked at the start of each tax year (1 January in the US, 6 April in the UK) and whenever a change is announced, such as a UK Budget or the IRS annual inflation adjustments. A guide shows an "Updated" date only when its content has been substantially revised.
Health and money content
Everything on BreezyCalc is for general information. It is not medical, financial, tax or legal advice. Health guides are not reviewed by a clinician; they summarise public guidance and link to it. For pregnancy, medication or diet changes, speak to your doctor or midwife. For large financial decisions, speak to a regulated adviser. See the full disclaimer.
Advertising and independence
BreezyCalc is free and is supported by advertising. Ads are labelled "Advertisement" and kept apart from calculator results. Advertisers have no say over what we publish. We do not publish sponsored posts or use affiliate links.
Corrections
If a figure, formula or claim looks wrong, email hello@breezycalc.com or use the contact page. Tell us the page and what looks wrong, with a source if you have one. Each report is checked against the source. If the page is wrong, it is fixed and its review date is updated.