Time Converter
Convert between seconds, minutes, hours, days, weeks, and more.
What Is the Time Converter?
A time converter translates between every unit of time from milliseconds up through years, so durations stop requiring mental gymnastics. Time units are uniquely awkward because they mix clean bases with messy reality: seconds chain in sixties, days in twenty fours, but months run 28 to 31 days and a year is 365.2422 days long. This tool handles the clean conversions exactly, like hours into seconds or weeks into minutes, and applies sensible conventions for calendar units, such as averaging a month at roughly thirty days when you need an approximation. Editors, developers, project managers, athletes, and students all hit these conversions weekly.
Key Statistics
-
Base 60
Seconds and minutes derive from Babylonian sexagesimal counting
Source: History of timekeeping
-
365.2422 days
The actual tropical year length that leap years compensate for
Source: Astronomical measurement
The Formula
Each unit has a fixed conversion factor (60 seconds per minute, 60 minutes per hour, 24 hours per day, etc.).
Worked Examples
Convert 72 hours to days by dividing by 24 to get exactly 3 days for a long weekend trip. Two weeks becomes 14 days, and multiplying by 24 hours gives 336 hours for a project timeline. For payroll, 40 hours converts to one standard work week. A 90 minute meeting equals 1.5 hours on your timesheet.
Podcast runtime in seconds
- An episode runs 2.5 hours
- Hours to minutes: multiply by 60 for 150 minutes
- Minutes to seconds: multiply by 60 again
The episode lasts 9,000 seconds.
Real World Use Cases
Media editing
Translate timestamps between frames, seconds, and hours during video production.
Project scheduling
Convert estimates between hours, workdays, and weeks consistently.
Training logs
Compare workout durations recorded in different units across apps.
Expert Tips
- ✓ Chain through seconds for exactness; every clean unit reduces to it.
- ✓ Treat month conversions as approximations unless a specific calendar range is defined.
- ✓ Milliseconds matter in code and audio; remember a second is one thousand of them.
- ✓ For billing, agree whether a day means 24 hours or an 8 hour workday before converting.
Frequently Asked Questions
How do I convert between time units? ▼
Multiply by 60 to go from minutes to seconds or hours to minutes, and divide by 60 to go the other way. Use 24 for days to hours and 365 (or 366) for years to days.
How many seconds are in a day? ▼
There are 86,400 seconds in a day: 24 hours times 60 minutes times 60 seconds. This converter can show you any time span in seconds, minutes, hours, or days.
How do I convert hours to minutes? ▼
Multiply the hours by 60. Two and a half hours is 150 minutes, and 3 hours is 180 minutes. To reverse it, divide minutes by 60.
How do I convert milliseconds to seconds? ▼
Divide the milliseconds by 1000. The value 2,500 milliseconds is 2.5 seconds, and 10,000 milliseconds is 10 seconds.
What is the difference between 12 hour and 24 hour time? ▼
The 12 hour clock uses AM and PM and repeats each hour twice a day. The 24 hour clock runs from 00:00 to 23:59 with no AM/PM, so 3 p.m. is written as 15:00. The military and much of the world use the 24 hour format.
How do I convert hours to seconds? ▼
Multiply the hours by 3600, since each hour has 60 minutes and each minute has 60 seconds. One hour is 3,600 seconds, and 24 hours is 86,400 seconds.
How many seconds are in an hour? ▼
Sixty minutes times sixty seconds gives exactly 3,600 seconds per hour.
How do I convert days to minutes? ▼
Multiply days by 24 to get hours, then by 60 again; three days equals 4,320 minutes.
Common Mistakes to Avoid
- ⚠ Confusing 12-hour AM/PM time with 24-hour military time when entering durations.
- ⚠ Assuming all months are the same length when converting between months and days (months range from 28 to 31 days).
- ⚠ Mixing up calendar days with business days which exclude weekends for contract and deadline calculations.
- ⚠ Using 30 days for every month when precision matters. February, months with thirty one days, and leap years all drift from that shortcut.
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Last updated: · by CalculatorPro Tools