📅 Date & Time Calculators

Time is relentless, but at least we can calculate it precisely. Our date and time calculators handle everything from a simple "how many days until my birthday?" to complex questions about business day deadlines, time zone conversions, and the exact number of years, months, and days you've been alive.

Age and Date Differences

The Age Calculator is one of our most popular tools for good reason — it doesn't just tell you how old you are in years. It gives you your age in years, months, days, hours, and minutes, plus the exact day of the week you were born. The Age Difference Calculator extends this to compare two people's ages, useful for everything from family planning to relationship curiosity.

The Date Difference Calculator is the workhorse of project planning. It computes the exact span between any two dates in multiple units simultaneously — handy for calculating loan terms, anniversary milestones, or how long a project has been running. For a forward-looking countdown, the Days Until Calculator tells you exactly how long until any future event, whether it's a holiday, a race, a wedding, or a contract renewal.

Business and Working Time

Contracts, payments, and project timelines typically count working days, not calendar days. The Business Days Calculator excludes weekends to give you an accurate working-day count between two dates. Need to add exactly 30 business days to today? The Add Days to Date Calculator handles both calendar days and business day additions.

Time Arithmetic and Time Zones

For time addition and subtraction — such as calculating total hours worked across multiple shifts — the Time Add/Subtract Calculator and Hours Calculator handle hours, minutes, and seconds across midnight boundaries. For international meetings and travel, the Time Zone Converter shows the current time in any city worldwide with full daylight saving time awareness.