Time Converter

Time is measured in more units than almost anything else — seconds, minutes, hours, days, weeks, months, and years — and converting between them means juggling different multipliers for every step: 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and roughly 365.25 days in a year once you account for leap years. It's easy to make an arithmetic slip when converting something like 10,000 minutes into days by hand.

Our time converter handles all of it instantly. Enter a value in seconds, minutes, hours, days, weeks, months, or years, and get accurate conversions across every other unit at once — no chained multiplication, no leap-year guesswork.

Whether you're estimating how many days a project will take when given a duration in hours, converting a video's runtime in seconds into minutes, or figuring out how many weeks are left until a deadline, this tool gives you a precise answer in seconds.

Time conversions come up constantly in project planning, science, and everyday scheduling. Project managers estimating a task quoted in hours need to know how many working days that spans; a task estimated at 40 hours takes roughly a full work week (5 days at 8 hours), but the math gets trickier with partial weeks or overtime. Scientists and engineers routinely convert between seconds and larger units when working with rates, frequencies, or durations in lab data, where a measurement in milliseconds or seconds needs to be expressed in minutes or hours for a report.

Everyday scheduling depends on quick, accurate time conversion too: figuring out how many weeks are left before a deadline given in days, converting a flight duration from minutes into hours and minutes, or estimating how many years a habit tracked in days represents (10,000 days is about 27.4 years). Because a calendar year isn't an exact number of days (365.25 on average, to account for leap years), any conversion involving months or years benefits from a calculator rather than a rough mental estimate.