Every calculator we publish, every correction we make, and every page we rewrite — dated, described, and kept honest.
Last updated: · Reviewed by the OtherCalculators editorial team
A calculator is only as trustworthy as its upkeep. This log exists so you can see exactly what we have changed and when — including the mistakes we have corrected. Dates here reflect the day the work actually shipped; we do not add entries to make the timeline look busier, and a page that has not changed keeps its original date rather than being re-stamped with today's. For how the tools themselves are built and sourced, see our Methodology.
Search now checks each calculator's full list of keywords, so a query like "tonnage" or "retirement limits" finds the right tool even when that exact word isn't in its title. The empty-search view now shows our real set of featured calculators plus a way to browse by category, replacing a fixed list and a dead-end "no results" message.
View pageThe icon shown in browser tabs and bookmarks now matches the logo used across the site, replacing an older, mismatched icon.
The top navigation now surfaces all 7 calculator categories in a drop-down menu, plus a direct link to search, so any tool on the site is reachable in two clicks from anywhere.
View pageThe asphalt, tarmac, financial, general, AP exam, cost, loan, and master calculator hubs now open with a plain-language answer, a guided tool chooser, and a sourced reference table, replacing the previous thin listing pages.
View pageSharing a link to any category hub now shows a purpose-made preview image on social media and in chat apps, instead of one generic site-wide image.
Our sitemap listed July 28 as the last-modified date for the contact page while the page itself displayed July 29. The two are now generated so they cannot disagree — a page's visible "Last updated" date and the date we report to search engines are always the same value.
View pageResolved the remaining accessibility, structured-data, and layout issues flagged during our internal site audit, including heading-order and link-labelling corrections on several calculator pages.
Rewrote our asphalt quantity, conversion, cost, and surface calculators — plus the financial, tarmac, and general tools — so each page explains the formula it runs, the assumptions behind its defaults, and the limits of its estimate, instead of presenting a bare input form.
View pageAdded explicit advertising and data-use disclosures to the privacy policy, and expanded the About page to state plainly who builds these tools, how they are verified, and where our expertise ends.
View pageAdded a machine-readable catalog of every calculator at /llms.txt and explicitly permitted AI crawlers in robots.txt, so tools like ChatGPT, Claude, and Perplexity can find and cite our calculators accurately rather than guessing at them.
Seven pages were suggesting related calculators from the wrong category. Corrected the links and added a compile-time check so a mismatched category can no longer reach the live site.
Introduced a shared set of content components so every calculator page presents its formula, worked example, and caveats in a consistent structure — the groundwork for the site-wide content expansion that followed.
A single page documenting how we build each calculator, which standards bodies our formulas follow (the IRS for 401(k) rules, the Asphalt Institute and ASTM for paving conventions, the College Board for AP scoring), how we handle cost estimates, and what our tools are explicitly not qualified to tell you.
View pageEvery trust page now shows when it was last reviewed and by whom, drawn from the same record that generates the page's structured data so the visible date and the machine-readable one can never drift apart.
A search page that lets you find a calculator by name or keyword without going through the category hubs.
View pageOur sitemap previously stamped every URL with the current build date, which told search engines that all 60+ pages changed every time we deployed. Each page now reports its own genuine last-modified date.
Consolidated per-page structured data into one connected graph with consistent publisher, author, and site entities, and corrected invalid category values that search engines were rejecting.
The main navigation link pointed to an outdated destination; it now goes straight to the full calculator catalog.
View pageReorganized the financial category listing so the retirement, loan, and savings tools are easier to tell apart at a glance.
View pageEight new retirement tools covering contributions, employer match, loans, early withdrawal, solo 401(k) plans, and a Roth-versus-traditional comparison — all following contribution and loan rules published by the IRS.
View pageAdded a single page listing every tool on the site, and reorganized the category structure so each calculator sits in one clear, predictable place.
View pageShows how extra payments change your payoff date and total interest, with a full amortization schedule and interactive charts.
View pageCalculates certificate-of-deposit maturity value and interest earned across compounding frequencies, with a visual breakdown of growth over the term.
View pageQuantity, sub-base, surface cost, driveway cost, and repair cost tools using UK paving terminology and metric units, for projects where our US asphalt tools don't quite fit.
View pageEstimates MOT Type 1 sub-base aggregate needed for a driveway or path, a standard first step in UK groundwork planning.
View pageEstimates bitumen binder quantities for surface dressing and paving work, rebuilt on a modular structure with full supporting content.
View pageRounds numbers to a chosen decimal place or significant figure, with the rounding rule applied shown explicitly so you can check the result.
View pageConvert raw section scores into the College Board's published 1–5 AP scale, so students can estimate where a practice exam would land.
View pageTwo new category sections, opening with a tree removal cost estimator and a US finance loan calculator.
View pageConverts a nominal interest rate into the effective annual rate, making offers with different compounding schedules directly comparable.
View pageEnabled traffic analytics so we can see which tools people actually rely on, and tidied the shared calculator layout for consistency.
The site went live with a complete set of asphalt calculators covering tonnage, volume, weight, area, thickness, density, unit conversions, and cost estimating for driveways, parking lots, roads, patches, and resurfacing work.
View pageBuilt the sitemap to derive directly from our calculator data, so a newly published tool is submitted to search engines without a manual step that could be forgotten.
Corrections reported by readers are a real source of the entries above. If a formula looks wrong, a figure has gone stale, or a result doesn't match your own math, tell us — and if a change is warranted, it will show up on this page with the date it shipped.
