Easily convert time units with the Time Unit Converter. Switch between seconds, minutes, hours, days, weeks, months, and years for accurate and quick calculations in any application!

Time Unit Converter

Time Unit Converter

Convert a time value between seconds, minutes, hours, days, and weeks.

* Enter your time value and select the units.

Step 1: Enter Conversion Data

Conversion Formula:
Converted Time = (Input Value × From Factor) ÷ To Factor
(Factors represent seconds per unit)

Time Unit Converter

Popular Time Unit Conversions

  • Minutes to Hours
  • Hours to Minutes
  • Hours to Days
  • Days to Hours
  • Seconds to Days
  • Days to Seconds
  • Minutes to Days
  • Days to Months
  • Months to Days
  • Days to Years
  • Years to Days
  • Minutes to Seconds
  • Seconds to Minutes
  • Milliseconds to Seconds
  • Seconds to Milliseconds

Complete List of Time Units for Conversion

  • Second [s]
  • Millisecond [ms]
  • Minute [min]
  • Hour [h]
  • Day [d]
  • Week
  • Month
  • Year [y]
  • Decade
  • Century
  • Millennium
  • Microsecond [µs]
  • Nanosecond [ns]
  • Picosecond [ps]
  • Femtosecond [fs]
  • Attosecond [as]
  • Shake
  • Month (synodic)
  • Year (Julian)
  • Year (leap)
  • Year (tropical)
  • Year (sidereal)
  • Day (sidereal)
  • Hour (sidereal)
  • Minute (sidereal)
  • Second (sidereal)
  • Fortnight
  • Septennial
  • Octennial
  • Novennial
  • Quindecennial
  • Quinquennial
  • Planck Time

Units, Symbols, and Conversion Values

Units, Symbols, and Conversion Values Used in Time Conversion to Common Units

Common Unit: Second [s]

Convert from Unit Symbol Convert to (s) Multiply by (Conversion Factor)
Millisecond ms Second 0.001
Minute min Second 60
Hour h Second 3600
Day d Second 86400
Week week Second 604800
Month month Second 2628000
Year y Second 31557600
Decade decade Second 315576000
Century century Second 3155760000
Millennium millennium Second 31557600000
Microsecond µs Second 1.0E-6
Nanosecond ns Second 1.0E-9
Picosecond ps Second 1.0E-12
Femtosecond fs Second 1.0E-15
Attosecond as Second 1.0E-18
Shake shake Second 1.0E-8
Month (synodic) month (synodic) Second 2551443.84
Year (Julian) year (Julian) Second 31557600
Year (leap) year (leap) Second 31622400
Year (tropical) year (tropical) Second 31556930
Year (sidereal) year (sidereal) Second 31558149.54
Day (sidereal) day (sidereal) Second 86164.09
Hour (sidereal) h (sidereal) Second 3590.1704166667
Minute (sidereal) min (sidereal) Second 59.8361736111
Second (sidereal) second (sidereal) Second 0.9972695602
Fortnight fortnight Second 1209600
Septennial septennial Second 220752000
Octennial octennial Second 252288000
Novennial novennial Second 283824000
Quindecennial quindecennial Second 473040000
Quinquennial quinquennial Second 157680000
Planck Time Planck time Second 5.39056E-44

Units, Symbols, and Conversion Values Used in Time Conversion from Common Units

Common Unit: Second [s]

Convert to Unit Symbol Convert from (s) Multiply by (Conversion Factor)
Millisecond ms Second 1000
Minute min Second 0.0166666667
Hour h Second 0.0002777778
Day d Second 0.0000115741
Week week Second 1.65343915E-6
Month month Second 3.80257025E-7
Year y Second 3.1709792E-8
Decade decade Second 3.1709792E-10
Century century Second 3.1709792E-11
Millennium millennium Second 3.1709792E-13
Microsecond µs Second 1000000
Nanosecond ns Second 1000000000
Picosecond ps Second 1000000000000
Femtosecond fs Second 1000000000000000
Attosecond as Second 1000000000000000000
Shake shake Second 1.0E+8
Month (synodic) month (synodic) Second 3.91357417E-7
Year (Julian) year (Julian) Second 3.1709792E-8
Year (leap) year (leap) Second 3.16438356E-8
Year (tropical) year (tropical) Second 3.1699034E-8
Year (sidereal) year (sidereal) Second 3.1701654E-8
Day (sidereal) day (sidereal) Second 1.1574074E-5
Hour (sidereal) h (sidereal) Second 0.0002777778
Minute (sidereal) min (sidereal) Second 0.0166666667
Second (sidereal) second (sidereal) Second 1.003),2695602
Fortnight fortnight Second 8.2671957E-7
Septennial septennial Second 4.5267494E-9
Octennial octennial Second 3.968253968E-10
Novennial novennial Second 3.5271323E-11
Quindecennial quindecennial Second 2.1179159E-10
Quinquennial quinquennial Second 6.3404355E-9
Planck Time Planck time Second 1.8507425E+43

Conversion Examples

Example 1: Converting Minutes to Hours

Given: 90 minutes

Objective: Convert to hours [h]

Steps:
  1. Identify the Starting Unit: Minutes (min)
  2. Find the Conversion Factor:
    • 1 min = 60 s
    • 1 h = 3600 s
    1 min = 60 s
    1 h = 3600 s
  3. Convert Minutes to Seconds:
    90 min × 60 s/min = 5400 s
  4. Convert Seconds to Hours:
    5400 s ÷ 3600 s/h = 1.5 h

Result: 90 min = 1.5 h

Example 2: Converting Days to Seconds

Given: 2 days

Objective: Convert to seconds [s]

Steps:
  1. Identify the Starting Unit: Days (d)
  2. Find the Conversion Factor:
    • 1 d = 86400 s
    1 d = 86400 s
  3. Multiply the Starting Value by the Conversion Factor:
    2 d × 86400 s/d = 172800 s

Result: 2 d = 172800 s


Practical Tips for Unit Conversion

  • Use Precise Conversion Factors: Ensure accuracy by using exact conversion factors, especially in scientific and engineering calculations.
  • Maintain Consistent Units: When performing calculations involving multiple units, ensure all units are appropriately converted to maintain consistency.
  • Understand the Relationship Between Units: Familiarize yourself with how different time units relate to each other, particularly between SI and non-SI systems.
  • Reference Reliable Sources: Always verify conversion factors using trusted references or official standards.
  • Utilize Technology: Leverage calculators or software tools to handle complex conversions and minimize manual errors.
  • Practice with Examples: Reinforce your understanding by working through various conversion scenarios.

Common Pitfalls and How to Avoid Them

  1. Incorrect Conversion Factors:
    • Solution: Always cross-check conversion factors with reliable sources before performing calculations.
  2. Misalignment of Units:
    • Solution: Ensure that numerator and denominator units are consistently converted to maintain dimensional integrity.
  3. Ignoring Unit Prefixes:
    • Solution: Pay attention to unit prefixes (e.g., kilo-, centi-, milli-) as they significantly affect conversion factors.
  4. Rounding Errors:
    • Solution: Carry sufficient decimal places during intermediate steps and round only the final result as needed.
  5. Confusing Similar Units:
    • Solution: Clearly distinguish between units such as s, ms, min, h, d, etc., to avoid mixing them up.
  6. Assuming Non-Standard Units are Equivalent:
    • Solution: Verify the equivalence of less common units before performing conversions.