Time Converter
Convert between seconds, minutes, hours, days, weeks, months, and years.
Unit
Time Converter
Generated on April 24, 2026
?What is the Time Converter?
A time-unit converter switches between seconds, minutes, hours, days, weeks, months, and years. It is useful for project planning (converting a 45-day deadline to business weeks), programming (translating seconds into hours for reports), fitness (splitting training hours across a year), and everyday questions like 'how many hours in a week?'. Because calendar months vary in length (28 to 31 days), this converter uses the average month (30.4369 days) and the average year (365.2425 days, the Gregorian value) so that conversions round-trip cleanly between months and years.
The Formula
The second is the SI base of time. Everything converts through it. An average Gregorian month is 30.4369 days — that's 365.2425 ÷ 12 — because the Gregorian calendar inserts a leap day every 4 years except in century years not divisible by 400. If you need calendar-month accuracy (say, rent for March vs. February), use the Date Difference Calculator instead, which respects individual month lengths.
Practical Examples
1 week contains exactly 604,800 seconds — a useful benchmark when measuring long-running processes.
1 year contains approximately 8,766 hours (average) — helpful for calculating annualized rates.
1 hour is exactly 3,600 seconds — a fundamental conversion in physics and engineering.
30 days is roughly 4.29 weeks — useful when translating monthly deadlines into weekly sprints.
A century is approximately 3.156 × 10⁹ seconds — the kind of number used in long-term astrophysical and geological calculations.
1 month of uptime at 99.9% reliability allows only about 43.2 minutes of downtime — a key SLA number for web services.