Date & Time Tools

🎂 Age Calculator Calculate exact age in years, months, and days. 🧩 Life in Weeks Calculator Visualize your life as a grid of weeks lived vs. remaining, based on your date of birth and life expectancy — inspired by Tim Urban's "Your Life in Weeks." 📱 Screen Time Cost Calculator See how your daily phone/screen time adds up over the years — in total days, waking days, full-time work years, and percent of your remaining life. 📅 Date Difference Calculator Find the exact difference between two dates and times — years, months, weeks, days, hours, minutes, seconds. 🗓️ Working Days Calculator Count business days between two dates, excluding weekends and optional holidays. 📆 Day of the Week Finder Find out what day of the week any date was or will be. ⏰ Timesheet / Hours Worked Calculator Enter multiple clock-in/out pairs to get total hours worked, with optional pay estimate. 🕐 Overtime Pay Calculator Calculate regular, overtime, and double-time pay from your hourly rate and hours worked, with a configurable overtime threshold and multiplier. 🚪 Notice Period Buyout & Last Working Day Calculator Find your last working day from your resignation date and notice period, plus the buyout cost if you leave early. ⏳ Countdown Timer Count down to any date and time, live. ⏲️ Timer Set a countdown timer in hours, minutes, and seconds, with quick presets like 5 or 30 minutes. 🌐 Time Zone Converter Convert a time between two time zones instantly. 🧭 Multi-Timezone Meeting Planner Find overlapping working hours across three or more time zones at once.