Free tools

Simple calculators, no account and no ads. They run entirely in your browser — nothing you type is sent anywhere.

• Reading time calculatorHow many hours a book, an article or pasted text takes at your own reading speed.
• Roman numeral converterConvert both ways between Roman and Arabic numerals, from I to 3999.
• Series watch time calculatorHow long a series takes end to end, and how many days to finish it at your pace.