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Free Date And Time Tools

Use date and time tools when a calendar, duration, time zone, timestamp, or work-hours detail changes the answer. These pages make the input labels visible so you can catch wrong dates, time zones, and start or end values before copying a result.

8

tools available

8

guides available

Free

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What this category helps with

  • Date, age, time, and hours calculators for planning, schedules, deadlines, and time-card math.
  • Calendar-aware helpers that explain whether they are counting dates, durations, or clock times.
  • Private in-browser answers with examples and guide pages for common date and time mistakes.

Start with these tools

Age CalculatorCalculate exact calendar age in years, months, days, and total days.Date CalculatorAdd or subtract days from a date, or count full days between two dates.Time CalculatorAdd or subtract hours, minutes, and seconds with normalized H:M:S, total seconds, and decimal hours.Hours CalculatorCalculate hours worked between start and end times with breaks and optional pay.Time Card CalculatorAdd weekday shifts, breaks, total hours, and optional gross pay.Time Zone CalculatorConvert a UTC date and time into a selected IANA time zone.

All date and time tools

Open a tool, try the examples, then use the matching guide when you need more explanation.

Age CalculatorCalculate exact calendar age in years, months, days, and total days.
Date CalculatorAdd or subtract days from a date, or count full days between two dates.
Time CalculatorAdd or subtract hours, minutes, and seconds with normalized H:M:S, total seconds, and decimal hours.
Hours CalculatorCalculate hours worked between start and end times with breaks and optional pay.

Guides for this category

Each guide uses its matching tool, with example numbers and plain limits.