About Quaestio
Quaestio collects small, fast tools for everyday use, across six areas: maths, units, money, time, language and development.
The name is Latin. Quaestio means the question, or the inquiry, and comes from the verb quaerere, to seek and to ask – the same root as question, query and quest. In Roman law a quaestio was a formal investigation before a court, and in the medieval universities it was a form of teaching: a question was put, the arguments for and against were weighed, and an answer followed.
That is roughly what this site does, on a smaller scale. You ask a question – how many days until midsummer, what is 12.5% of 840, how far is a mile in kilometres – and the answer sits at the top of the page, with nothing in the way.
Everything is calculated directly in your browser. That means the tools keep working without a connection once the page has loaded, and that nothing you type is sent to us, except a word you choose to suggest.
The site is static and rebuilt on every change. It has no accounts, no sign-in and no trackers beyond what is described on the privacy page.
The exception is exchange rates, which are fetched from the European Central Bank through the Frankfurter service when you open the currency converter. No information about you is sent, only a request for the day’s rates.
Who is behind Quaestio
Quaestio is built and run by Pontus Silow in Sweden. It is an independent project, owned by no group and working for no client: nobody pays for a tool to exist or for what it says.
Questions, mistakes and suggestions go to quaestio.application@gmail.com. Everything that comes in is read, and corrections are made in every language at once.
How the tools are checked
Every calculation has automated tests that run before a change reaches the site, more than 2,000 of them today. They check known answers, such as 100 °C being 212 °F and week 1 starting correctly at the turn of a year, as well as edge cases and invalid input.