How to Use the Time Unit Converter
Select a time value and unit from the dropdown. All conversions — from seconds to years — update instantly. Useful for project planning, subscription lengths, equipment lifetimes, and interesting time comparisons like the 10,000-hour rule.
Conversion Factors Used
1 minute = 60 seconds; 1 hour = 3,600 seconds; 1 day = 86,400 seconds; 1 week = 604,800 seconds; 1 month (avg) = 2,629,800 seconds (= 365.25 / 12 × 86,400); 1 year (avg) = 31,557,600 seconds (= 365.25 × 86,400). For exact calendar dates, work in days and add/subtract manually.
Fun Time Comparisons
10,000 hours = 416.7 days = about 1.14 years. Average human lifespan 80 years = 29,220 days = 700,800 hours. One month subscription = 30 days = 43,200 minutes = 2,592,000 seconds. These give perspective on how humans spend time across a lifetime.
Very Large Numbers
For cosmic or geological timescales (age of the universe ~13.8 billion years), very large values display in scientific notation (e.g. 4.35e+17 seconds). For typical human, business, or engineering timescales, all units display in plain numbers.
Frequently Asked Questions
This converter uses the average year of 365.25 days, which accounts for leap years over a 4-year cycle. For a specific calendar year (365 or 366 days), enter your value in days for maximum accuracy.
This converter uses actual clock time (24 hours/day, 7 days/week). For business hours, divide the result by 3 (24/8) for hours-per-day or by 1.4 (7/5) for days-per-week adjustments after converting.