Time Conversions
Convert time units — seconds, minutes, hours, days, weeks, and years. Free calculators for scheduling, payroll, and project planning.
8 units · 9 calculators · reference page (not prioritized for search)
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.
Quick time calculator
Time Calculator
Popular time conversions
- Seconds to Minutes (utility)
- Minutes to Hours (utility)
- Hours to Days (utility)
- Days to Weeks (utility)
- Weeks to Months (utility)
- Months to Years (utility)
- Hours to Workdays (utility)
- Days to Workdays (utility)
- Workdays to Hours (utility)
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.