Free everyday tools
Simple calculators and converters that run entirely in your browser. No accounts, no tracking of your inputs — just quick answers for daily tasks.
All tools
Percentage Calculator
ReadyCalculate percent of a number, what percent X is of Y, percentage increase/decrease, and discount prices.
Open tool →Tip Calculator
ReadyCalculate tip percentage, split the bill, and see what each person pays.
Open tool →Unit Converter
ReadyConvert length, weight, temperature, and volume between metric and imperial units.
Open tool →Date Difference Calculator
ReadyFind days, weeks, or months between two dates, or add N days to a date.
Open tool →Word Counter
ReadyCount words, characters, paragraphs, and estimate reading time.
Open tool →Case Converter
ReadyConvert text to UPPER, lower, Title, sentence, snake_case, or kebab-case.
Open tool →Random List Picker
ReadyPaste a list and pick a random item, or shuffle the whole list.
Open tool →Checklist Generator
ReadyTurn a list of items into a printable or Markdown checklist.
Open tool →
How-to guides
Short English walkthroughs for common questions —percentage increase,how much to tip,unit conversion, anddays between dates. See all guides.
Why these tools?
- Client-side only — your numbers never leave the device.
- Mobile-friendly layouts for quick checks on the go.
- Clear formulas and examples so you can trust the result.