Timelet - Calculate Age, Days & Date

Calculate ages, days between dates, and add or subtract time — right from your browser.

✦ Timelet — Date & Time Calculator Timelet is a lightweight browser extension that puts powerful date calculations at your fingertips. No need to open a separate app or website — everything works instantly from your browser toolbar. ✦ Age Finder / Age Calculator: Enter any date of birth and Timelet instantly calculates the exact age in years, months, and days. It also shows the total months, weeks, days, and hours lived — plus a countdown to the next birthday with the exact date and weekday. ✦ Between Dates: Pick any two dates and see exactly how much time lies between them — broken down into years, months, and days in a clean readable format, along with the total day count and weeks. An optional toggle lets you include the end date in the calculation. ✦ Add / Subtract: Starting from any date, add or subtract any combination of years, months, and days to instantly find the resulting date. Results show the full date, the long-form date, and the weekday — useful for deadlines, countdowns, and planning. ✦ Built for everyday use - Remembers your last session, reopens exactly where you left off - Clean calendar picker for fast date selection - Light and dark mode with one click - All calculations update live as you type