About Everyday Tools
Small tools for the things you do every day.
Everyday Tools offers 50 calculators, timers, selection tools and everyday lists. Open a tool, enter your conditions and use it without an account. Korean and English versions share the same calculation logic.
Understand the result
Each tool includes instructions, an example and common questions. Money examples use Korean won (KRW); the VAT tool uses a fixed Korean 10% rate. Date-based “today” defaults use Korean time. Prices and electricity rates are entered by you, not live market quotes.
Random draws and lotto numbers
Number picks are random, not predictions of future draws. Choosing a suggested combination cannot improve its chance of winning. The 6/45 all-match probability shown is 1 in 8,145,060, excluding bonus numbers. Marble roulette is a physics game, not a certified drawing system.
Photos and credits
The lunch catalog contains 138 real photographs and 6 AI-generated examples. Generated and representative images are labeled; each real photograph links to its source and license.