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3 calculators

Date & Time Calculators

These date and time tools answer questions about birthdays, elapsed days, business days, custom weekday exclusions, shifts, breaks, rounding, overtime, and pay. They keep the inputs simple and show the calculation in units that are easy to reuse.

Tools in this category

Age Calculator Work out an exact age from a date of birth. Date Difference Calculator Count calendar days, exact span, business days, weekends, and exclusions. Time Duration Calculator Calculate shift duration, breaks, overtime, rounding, and estimated pay.

What this category covers

These date and time tools answer questions about birthdays, elapsed days, business days, custom weekday exclusions, shifts, breaks, rounding, overtime, and pay. They keep the inputs simple and show the calculation in units that are easy to reuse.

Each calculator has its own page with a focused form, formula notes, worked examples, and related tools. Start with the closest calculator below, then follow the related links when the problem needs another step.

Date & Time — common questions

Can I calculate exact age on a past or future date?

Yes. The age calculator lets you choose the comparison date, so you can calculate age today, on a past date, or on a future date.

Can I count business days between dates?

Yes. The date difference calculator shows calendar days, weekday-style business days, weekend days, and a field for custom excluded weekdays.