About Quick Unit Converter
Who maintains this site
Quick Unit Converter is built and maintained by Michael Munz (trading as Aurora Ivy). Michael has spent two decades working with international teams where unit mix-ups are a daily tax: American plans meeting metric tools, US recipes in European kitchens, mpg figures meeting L/100 km. The site exists because he kept needing one converter that is fast, precise, and explains the context around the numbers.
Every category guide on this site is written from that practical experience and checked against official sources: SI unit definitions (BIPM), the US National Institute of Standards and Technology (NIST) conversion tables, and European Central Bank reference rates for currency.
How the conversions work
All calculations run locally in your browser. Nothing you type is sent to a server; the page works offline once loaded. Internally, every unit is defined against its SI base unit (meter, kilogram, second, kelvin, and so on) using exact internationally agreed factors, for example 1 inch = 25.4 millimeters exactly, by international agreement since 1959.
Data sources
- Units and factors: SI definitions (BIPM) and NIST Special Publication 811
- Currency rates: European Central Bank reference rates, refreshed daily via the free frankfurter.dev API. ECB rates are published once per business day around 16:00 CET
- Practical context (speed limits, regulations, doneness temperatures): cited regulatory sources, reviewed annually
Accuracy disclaimer
Conversion factors are exact where international definitions make them exact, and rounded to at most 8 significant digits elsewhere. Currency reference rates are indicative, not transactional: your bank or card provider applies its own spread and fees. For financial, engineering, medical, or safety-critical decisions, verify with a certified source before acting on any converted value.
Questions or corrections: see the contact page. Legal notice: see the Imprint.