Time Conversions

Convert time units — seconds, minutes, hours, days, weeks, and years. Free calculators for scheduling, payroll, and project planning.

8 units · 9 conversions

Time conversions break durations into smaller or larger units — seconds into minutes, hours into days, months into years. These are used in payroll, project timelines, scientific experiments, and everyday scheduling.

Most time units convert by fixed ratios (60 seconds per minute, 24 hours per day). Months and years are trickier because calendar months vary in length; our calculators use standard average values where a single multiplier applies.

Popular time conversions

Real-world example

A contract pays a rate per hour but you tracked 3 days and 5 hours of work. Converting days to hours (3 × 24 + 5 = 77 hours) lets you multiply by your hourly rate without manual errors.

All time conversions

Time units explained

Seconds (s) · base unit
Also: seconds, sec
Minutes (min)
Also: minutes
Hours (hr)
Also: hours
Days (day)
Also: days
Weeks (wk)
Also: weeks
Workdays (wd)
Also: workdays, business day, business days
Months (mo)
Also: months
Years (yr)
Also: years

Frequently asked questions

How many seconds are in an hour?
One hour equals 3,600 seconds (60 minutes × 60 seconds).
How are months converted to years?
For simple estimates, 12 months equal one year. Calendar-accurate conversions depend on specific start and end dates.

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