⏰ Time Calculators UK
Time and date calculators for working out durations, differences and deadlines quickly and accurately — from age in years and days to the gap between two dates.
Calculating time spans by hand is a common source of off-by-one errors — leap years, varying month lengths and time zones all complicate what looks like simple subtraction. Whether you're working out someone's exact age, the number of days until a deadline, or the duration between two events, small mistakes add up quickly when done manually.
These calculators handle the calendar arithmetic properly — leap years included — so you get an exact answer instead of an approximate one.
All Time calculators
Frequently asked questions
Do these time calculators account for leap years?
Yes — date and duration calculations account for leap years automatically, since manual calculations often miss them and introduce small errors, especially over multi-year spans.