Time Unit Converter
The time unit converter allows you to convert between commonly used time measurements such as seconds, minutes, hours, days, weeks, months, and years. This tool is useful for project managers, scientists, students, and anyone working with time calculations. Select a conversion below or choose from popular time unit conversions.
Supported Time Units
| Unit | Short Form | Description |
|---|---|---|
| Second | s | SI base unit of time |
| Millisecond | ms | 1/1,000 of a second |
| Microsecond | us | 1/1,000,000 of a second |
| Nanosecond | ns | 1/1,000,000,000 of a second |
| Minute | min | 60 seconds |
| Hour | h | 60 minutes or 3,600 seconds |
| Day | day | 24 hours |
| Week | week | 7 days |
| Month | month | Approximately 30.44 days (average) |
| Year | year | 365.25 days (accounting for leap years) |
| Decade | decade | 10 years |
| Century | century | 100 years |
| Millennium | millennium | 1,000 years |
| Picosecond | ps | 1/1,000,000,000,000 of a second |
| Femtosecond | fs | 10^-15 seconds, used in laser physics |
| Attosecond | as | 10^-18 seconds, ultrafast phenomena |
Popular Time Conversions
How Time Unit Conversion Works
Time units are converted using fixed mathematical ratios based on standard definitions.
For example, 1 hour equals 60 minutes or 3,600 seconds.
Our time converter uses accurate conversion factors to ensure precise results for scheduling, scientific calculations, and project management.
Common Use Cases
- Project time estimation and tracking
- Scientific experiment timing
- Programming and computer science (timestamps)
- Age calculations
- Event planning and scheduling
Frequently Asked Questions
How accurate is the time unit converter?
Our converter uses precise conversion factors based on international standards. Results are accurate to multiple decimal places, suitable for professional use in science, engineering, and project management.
How many seconds are in a day?
1 day equals exactly 86,400 seconds (24 hours × 60 minutes × 60 seconds).
How many hours are in a week?
1 week equals exactly 168 hours (7 days × 24 hours).
How many days are in a year?
A standard year has 365 days, but accounting for leap years, the average is 365.25 days. Our converter uses 365.25 days for year conversions.
What is a millisecond?
A millisecond is 1/1,000 of a second. Milliseconds are commonly used in computing, sports timing, and scientific measurements.
How do I convert hours to minutes?
To convert hours to minutes, multiply by 60. For example, 2.5 hours equals 150 minutes.
What are picoseconds and femtoseconds used for?
Picoseconds (10^-12 s) and femtoseconds (10^-15 s) are used to measure extremely fast phenomena in physics and chemistry, such as molecular vibrations, laser pulses, and chemical reactions.
How many weeks are in a year?
There are approximately 52.18 weeks in a year (365.25 days ÷ 7 days per week).
Related Unit Converters
All Time Unit Conversions
Section titled “ All Time Unit Conversions ” Second to Millisecond (seconds
to ms)
Second to Microsecond (seconds
to us)
Second to Nanosecond (seconds
to ns)
Second to Minute (seconds
to minutes)
Second to Hour (seconds
to h)
Second to Day (seconds
to day)
Second to Week (seconds
to week)
Second to Month (seconds
to month)
Second to Year (seconds
to year)
Second to Decade (seconds
to decade)
Second to Century (seconds
to century)
Second to Millennium (seconds
to millennium)
Second to Picosecond (seconds
to ps)
Second to Femtosecond (seconds
to fs)
Second to Attosecond (seconds
to as)
Millisecond to Second (ms
to seconds)
Millisecond to Microsecond (ms
to us)
Millisecond to Nanosecond (ms
to ns)
Millisecond to Minute (ms
to minutes)
Millisecond to Hour (ms
to h)
Millisecond to Day (ms
to day)
Millisecond to Week (ms
to week)
Millisecond to Month (ms
to month)
Millisecond to Year (ms
to year)
Millisecond to Decade (ms
to decade)
Millisecond to Century (ms
to century)
Millisecond to Millennium (ms
to millennium)
Millisecond to Picosecond (ms
to ps)
Millisecond to Femtosecond (ms
to fs)
Millisecond to Attosecond (ms
to as)
Microsecond to Second (us
to seconds)
Microsecond to Millisecond (us
to ms)
Microsecond to Nanosecond (us
to ns)
Microsecond to Minute (us
to minutes)
Microsecond to Hour (us
to h)
Microsecond to Day (us
to day)
Microsecond to Week (us
to week)
Microsecond to Month (us
to month)
Microsecond to Year (us
to year)
Microsecond to Decade (us
to decade)
Microsecond to Century (us
to century)
Microsecond to Millennium (us
to millennium)
Microsecond to Picosecond (us
to ps)
Microsecond to Femtosecond (us
to fs)
Microsecond to Attosecond (us
to as)
Nanosecond to Second (ns
to seconds)
Nanosecond to Millisecond (ns
to ms)
Nanosecond to Microsecond (ns
to us)
Nanosecond to Minute (ns
to minutes)
Nanosecond to Hour (ns
to h)
Nanosecond to Day (ns
to day)
Nanosecond to Week (ns
to week)
Nanosecond to Month (ns
to month)
Nanosecond to Year (ns
to year)
Nanosecond to Decade (ns
to decade)
Nanosecond to Century (ns
to century)
Nanosecond to Millennium (ns
to millennium)
Nanosecond to Picosecond (ns
to ps)
Nanosecond to Femtosecond (ns
to fs)
Nanosecond to Attosecond (ns
to as)
Minute to Second (minutes
to seconds)
Minute to Millisecond (minutes
to ms)
Minute to Microsecond (minutes
to us)
Minute to Nanosecond (minutes
to ns)
Minute to Hour (minutes
to h)
Minute to Day (minutes
to day)
Minute to Week (minutes
to week)
Minute to Month (minutes
to month)
Minute to Year (minutes
to year)
Minute to Decade (minutes
to decade)
Minute to Century (minutes
to century)
Minute to Millennium (minutes
to millennium)
Minute to Picosecond (minutes
to ps)
Minute to Femtosecond (minutes
to fs)
Minute to Attosecond (minutes
to as)
Hour to Second (h
to seconds)
Hour to Millisecond (h
to ms)
Hour to Microsecond (h
to us)
Hour to Nanosecond (h
to ns)
Hour to Minute (h
to minutes)
Hour to Day (h
to day)
Hour to Week (h
to week)
Hour to Month (h
to month)
Hour to Year (h
to year)
Hour to Decade (h
to decade)
Hour to Century (h
to century)
Hour to Millennium (h
to millennium)
Hour to Picosecond (h
to ps)
Hour to Femtosecond (h
to fs)
Hour to Attosecond (h
to as)
Day to Second (day
to seconds)
Day to Millisecond (day
to ms)
Day to Microsecond (day
to us)
Day to Nanosecond (day
to ns)
Day to Minute (day
to minutes)
Day to Hour (day
to h)
Day to Week (day
to week)
Day to Month (day
to month)
Day to Year (day
to year)
Day to Decade (day
to decade)
Day to Century (day
to century)
Day to Millennium (day
to millennium)
Day to Picosecond (day
to ps)
Day to Femtosecond (day
to fs)
Day to Attosecond (day
to as)
Week to Second (week
to seconds)
Week to Millisecond (week
to ms)
Week to Microsecond (week
to us)
Week to Nanosecond (week
to ns)
Week to Minute (week
to minutes)
Week to Hour (week
to h)
Week to Day (week
to day)
Week to Month (week
to month)
Week to Year (week
to year)
Week to Decade (week
to decade)
Week to Century (week
to century)
Week to Millennium (week
to millennium)
Week to Picosecond (week
to ps)
Week to Femtosecond (week
to fs)
Week to Attosecond (week
to as)
Month to Second (month
to seconds)
Month to Millisecond (month
to ms)
Month to Microsecond (month
to us)
Month to Nanosecond (month
to ns)
Month to Minute (month
to minutes)
Month to Hour (month
to h)
Month to Day (month
to day)
Month to Week (month
to week)
Month to Year (month
to year)
Month to Decade (month
to decade)
Month to Century (month
to century)
Month to Millennium (month
to millennium)
Month to Picosecond (month
to ps)
Month to Femtosecond (month
to fs)
Month to Attosecond (month
to as)
Year to Second (year
to seconds)
Year to Millisecond (year
to ms)
Year to Microsecond (year
to us)
Year to Nanosecond (year
to ns)
Year to Minute (year
to minutes)
Year to Hour (year
to h)
Year to Day (year
to day)
Year to Week (year
to week)
Year to Month (year
to month)
Year to Decade (year
to decade)
Year to Century (year
to century)
Year to Millennium (year
to millennium)
Year to Picosecond (year
to ps)
Year to Femtosecond (year
to fs)
Year to Attosecond (year
to as)
Decade to Second (decade
to seconds)
Decade to Millisecond (decade
to ms)
Decade to Microsecond (decade
to us)
Decade to Nanosecond (decade
to ns)
Decade to Minute (decade
to minutes)
Decade to Hour (decade
to h)
Decade to Day (decade
to day)
Decade to Week (decade
to week)
Decade to Month (decade
to month)
Decade to Year (decade
to year)
Decade to Century (decade
to century)
Decade to Millennium (decade
to millennium)
Decade to Picosecond (decade
to ps)
Decade to Femtosecond (decade
to fs)
Decade to Attosecond (decade
to as)
Century to Second (century
to seconds)
Century to Millisecond (century
to ms)
Century to Microsecond (century
to us)
Century to Nanosecond (century
to ns)
Century to Minute (century
to minutes)
Century to Hour (century
to h)
Century to Day (century
to day)
Century to Week (century
to week)
Century to Month (century
to month)
Century to Year (century
to year)
Century to Decade (century
to decade)
Century to Millennium (century
to millennium)
Century to Picosecond (century
to ps)
Century to Femtosecond (century
to fs)
Century to Attosecond (century
to as)
Millennium to Second (millennium
to seconds)
Millennium to Millisecond (millennium
to ms)
Millennium to Microsecond (millennium
to us)
Millennium to Nanosecond (millennium
to ns)
Millennium to Minute (millennium
to minutes)
Millennium to Hour (millennium
to h)
Millennium to Day (millennium
to day)
Millennium to Week (millennium
to week)
Millennium to Month (millennium
to month)
Millennium to Year (millennium
to year)
Millennium to Decade (millennium
to decade)
Millennium to Century (millennium
to century)
Millennium to Picosecond (millennium
to ps)
Millennium to Femtosecond (millennium
to fs)
Millennium to Attosecond (millennium
to as)
Picosecond to Second (ps
to seconds)
Picosecond to Millisecond (ps
to ms)
Picosecond to Microsecond (ps
to us)
Picosecond to Nanosecond (ps
to ns)
Picosecond to Minute (ps
to minutes)
Picosecond to Hour (ps
to h)
Picosecond to Day (ps
to day)
Picosecond to Week (ps
to week)
Picosecond to Month (ps
to month)
Picosecond to Year (ps
to year)
Picosecond to Decade (ps
to decade)
Picosecond to Century (ps
to century)
Picosecond to Millennium (ps
to millennium)
Picosecond to Femtosecond (ps
to fs)
Picosecond to Attosecond (ps
to as)
Femtosecond to Second (fs
to seconds)
Femtosecond to Millisecond (fs
to ms)
Femtosecond to Microsecond (fs
to us)
Femtosecond to Nanosecond (fs
to ns)
Femtosecond to Minute (fs
to minutes)
Femtosecond to Hour (fs
to h)
Femtosecond to Day (fs
to day)
Femtosecond to Week (fs
to week)
Femtosecond to Month (fs
to month)
Femtosecond to Year (fs
to year)
Femtosecond to Decade (fs
to decade)
Femtosecond to Century (fs
to century)
Femtosecond to Millennium (fs
to millennium)
Femtosecond to Picosecond (fs
to ps)
Femtosecond to Attosecond (fs
to as)
Attosecond to Second (as
to seconds)
Attosecond to Millisecond (as
to ms)
Attosecond to Microsecond (as
to us)
Attosecond to Nanosecond (as
to ns)
Attosecond to Minute (as
to minutes)
Attosecond to Hour (as
to h)
Attosecond to Day (as
to day)
Attosecond to Week (as
to week)
Attosecond to Month (as
to month)
Attosecond to Year (as
to year)
Attosecond to Decade (as
to decade)
Attosecond to Century (as
to century)
Attosecond to Millennium (as
to millennium)
Attosecond to Picosecond (as
to ps)
Attosecond to Femtosecond (as
to fs)