Toolspy

Weight Converter

Convert between different units of weight and mass

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Use this age calculator to work out exact age from a date of birth, days between two dates, or countdown to the next birthday. Results break down into years, months, days, and total weeks, hours, and minutes for fun.

Useful for forms that ask for exact age, eligibility checks, anniversary planning, and travel visa rules. Leap-year handling, timezone-friendly, and accurate to the day.

age calculator
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1. Enter birth date

Pick your date of birth (or any start date).

2. Set end date

Defaults to today. Change it for any date range.

3. Read the breakdown

Years / months / days plus alternate units and countdown.



Different ways to view the same age

Pick the unit that fits what you need.

Unit

When to use

Years, months, days

Birthday cards, profile info, the classic answer.

Total months

Child milestones, vesting periods, visas.

Total weeks

Pregnancy milestones, habit tracking.

Total days

Countdowns, anniversaries, quick comparisons.

Total hours / minutes

Birthday fun facts and novelty.

Pitfalls

Common pitfalls

Wrong timezone

Birthdays are date-based, not instant-based. Crossing timezones shouldnโ€™t flip the day - pick the locale of birth.

Mixing โ€˜monthsโ€™ and โ€˜4 weeksโ€™

A month isnโ€™t always 4 weeks. Use months for age, weeks for short intervals.

Age vs birthday logic

You โ€˜turnโ€™ X on your birthday. Until then, youโ€™re still X โˆ’ 1 even if months are close.

Leap-day birthdays

Feb 29 birthdays usually celebrate on Feb 28 / Mar 1 in non-leap years. The tool reports calendar-accurate age either way.

Conclusion

Use this age calculator to work out exact age from a date of birth, days between two dates, or countdown to the next birthday. Results break down into years, months, days, and total weeks, hours, and minutes for fun.

Useful for forms that ask for exact age, eligibility checks, anniversary planning, and travel visa rules. Leap-year handling, timezone-friendly, and accurate to the day.

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Calendar-aware: it counts completed years, then months, then days between your birth date and the end date. Leap years (including Feb 29 birthdays) are handled correctly.

Use this age calculator to work out exact age from a date of birth, days between two dates, or countdown to the next birthday. Results break down into years, months, days, and total weeks, hours, and minutes for fun.

Useful for forms that ask for exact age, eligibility checks, anniversary planning, and travel visa rules. Leap-year handling, timezone-friendly, and accurate to the day.

FAQ

Is the age calculator free to use?

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How does it calculate exact age?

Calendar-aware: it counts completed years, then months, then days between your birth date and the end date. Leap years (including Feb 29 birthdays) are handled correctly.