Working Days, Hours and Deadline Planning
How to calculate business days, elapsed hours, date gaps and countdowns without losing track of weekends.
Time tools
Time and Date Calculators
Calculate age, date differences, working days, hours, time zones and countdowns.
Time and date calculations become trickier when weekends, cut-off times, time zones or working patterns are involved. A simple date gap is not always the same as usable working time.
These calculators help with ages, deadlines, durations, business days and time zone checks. Use the result to plan clearly, then confirm any legal, payroll or contractual deadline separately.
6 calculators
Work out dates, durations, time differences and countdowns without reaching for a spreadsheet.
TimeAgeCalculate exact age in years, months and days from a date of birth, plus total days and the next birthday.TimeDate DifferenceCount days, weeks, months and years between two dates, with optional inclusive counting for deadlines and planning.TimeBusiness DaysCount weekdays between two dates and optionally exclude UK bank holidays entered manually.TimeHoursCalculate hours between two times with an optional break, including shifts that cross midnight.TimeTime ZoneConvert a date and time between two UTC offsets, with the time difference and converted local time.TimeCountdownCount days, weeks and approximate months until a future date for deadlines, events and planning.
Guides
Useful reading for time questions
Read the background, then move straight into the linked calculators when you need a result.
Date Difference vs Business Days
How calendar days, weekdays and business days produce different answers for deadlines and planning.
How to Plan a Meeting Across Time Zones
How to compare local times, UTC offsets, daylight saving time and practical meeting windows.
Exact Age, Next Birthday and Age in Months
How age calculations work for years, months, days and next birthday countdowns.