What ConvertMe.org Is

ConvertMe.org is a free online unit conversion tool. It runs entirely in your browser and covers more than thirty categories of measurement — from everyday length, weight and temperature conversions to specialised areas like data transfer, illuminance, fuel economy, BMI and Roman numerals.

The whole site is one interactive page plus a small set of supporting documents. There is no account to create, nothing to install, and no premium tier. Open the page, pick a category, type a value, and the result appears as you type.

Who It Is For

The tool is designed to be useful for a wide range of readers:

• Students working through homework problems that span multiple unit systems.
• Travellers who need quick currency, distance or temperature conversions.
• Home cooks adapting recipes between US cups and metric grams or millilitres.
• DIY and trade users converting between feet, metres, square metres and similar units.
• Engineers, scientists and developers needing a quick check across SI prefixes, pressure, energy or number bases.
• Anyone who occasionally needs to convert one unit to another and would rather not download an app.

How Conversions Are Calculated

Each category in the tool stores a base unit and a numerical factor for every other unit in that category. When you enter a value, the input is converted to the base unit, then from the base unit to the requested output. Temperatures, time zones and Roman numerals use small custom routines instead of a single factor, because their relationships are not purely multiplicative.

Conversion factors are taken from internationally recognised references — the International System of Units (SI) maintained by the BIPM, publications from the United States National Institute of Standards and Technology (NIST), and standard ISO definitions. The aim is to match the precision typically required for general use, education and most professional reference work. For mission-critical engineering, financial settlement or legal documentation, conversions should always be independently verified.

Currency Notes

Currency rates inside the tool are provided as approximate reference values, not live market rates. They are intended for ballpark conversions and travel planning. Do not rely on them for trading, accounting, tax filings or any decision where the exact rate at a given moment matters.

Editorial Approach

The supporting written content on the site — the About, Privacy, Terms, Cookies, Disclaimer and any topical guides — is written and reviewed in plain English, with an emphasis on accuracy over salesmanship. Pages are reviewed periodically and the visible "Last reviewed" date on each page reflects the most recent check. When an underlying fact changes (a policy update, a corrected formula, a new category), the relevant page is updated rather than rewritten from scratch.

If a number, statement or claim on the site looks wrong, please get in touch. Corrections are welcomed and acted on quickly.

How the Site Is Funded

ConvertMe.org is supported by display advertising delivered through Google AdSense. Ads help cover hosting and ongoing development costs and keep the converter free to use. Advertising and analytics — including Google Analytics — use cookies and similar technologies; details of what is collected and your choices are explained in the Privacy Policy and Cookie Policy.

The values you type into the converter itself are processed locally in your browser and are not transmitted to ConvertMe.org's servers.

Technology

The site is a static HTML, CSS and JavaScript application. There is no backend database, no user login, and no server-side processing of conversion inputs. This keeps load times short, makes the site work well on slow connections, and keeps the surface area for bugs and security issues small.

Background Reading

Alongside the converter itself, ConvertMe.org publishes a small library of explainer pages for the unit systems most readers run into. They are useful when a single number is not enough and you want to know why the conversion works the way it does:

• Metric vs. imperial — how the two systems compare and where each is used.
• SI base units and prefixes — the seven base units and the official decimal prefix table.
• Temperature scales — the relationships between Celsius, Fahrenheit, Kelvin, Rankine and Réaumur.
• Bits, bytes, KB vs KiB — why a 1 TB drive reports as 931 GB.
• Cooking conversions — cups, grams, density and oven temperatures.

Get In Touch

Questions, corrections, suggestions for new categories and general feedback are all welcome. Reach the site by email at [email protected] or via the contact page.