Rates are European Central Bank reference rates published via Frankfurter (not live interbank quotes). Cached in your browser for the day. Needs network once per day.
Same rate source as the Currency category in the
Unit Converter — exposed here for people who only need money.
Conversion is amount × (rateto / ratefrom) against EUR base rates.
No — they are ECB reference rates, typically updated once on working days. Banks add spreads and fees.
Fixed unit factors never change; exchange rates do. Your browser requests rates from Frankfurter and caches them for the day.