Time Converter
Quick answer: Choose a starting unit and a target unit, then enter a value. Common conversions: 1 h = 60 min; 1 s = 0.01666667 min; 1 s = 0.0002777778 h. This converter covers 13 time units.
- Calculator
- Formula
- Examples
- Step by step
- Popular conversions
- Reading your result
- Mistakes
- FAQ
- Related tools
- Method
Use the Time Converter
Time formula and what each symbol means
target = value × (factor of starting unit ÷ factor of target unit), where each factor is the unit value in s.
| Symbol | Meaning |
|---|---|
| value | The number you want to convert |
| factor | The unit’s size expressed in the base unit (s) |
Time examples
h to min
10 h = 600 min.
s to min
10 s = 0.1666667 min.
s to h
10 s = 0.002777778 h.
How to calculate Time step by step
- Choose the starting unit and the target unit.
- Enter your value.
- Read the converted value, plus the conversion factor in both directions.
Popular time conversions
- Seconds to Minutes converter
- Seconds to Hours converter
- Seconds to Days converter
- Seconds to Weeks converter
- Seconds to Years converter
- Minutes to Seconds converter
- Minutes to Hours converter
- Minutes to Days converter
- Minutes to Weeks converter
- Minutes to Years converter
- Hours to Seconds converter
- Hours to Minutes converter
- Hours to Days converter
- Hours to Weeks converter
- Hours to Years converter
- Days to Seconds converter
How to read your Time result
Seconds, minutes, hours, days and weeks convert exactly. Months and years vary in length, so this tool uses averages: a year is 365.25 days (the Julian year) and a month is one twelfth of that, 30.4375 days.
| UNIT | SYMBOL | EQUALS | VALUE OF 1 S |
|---|---|---|---|
| Second | s | 1 s = 1 s | 1 s |
| Millisecond | ms | 1 ms = 0.001 s | 1,000 ms |
| Microsecond | µs | 1 µs = 0.000001 s | 1,000,000 µs |
| Nanosecond | ns | 1 ns = 1×10⁻⁹ s | 1,000,000,000 ns |
| Minute | min | 1 min = 60 s | 0.01666667 min |
| Hour | h | 1 h = 3,600 s | 0.0002777778 h |
| Day | d | 1 d = 86,400 s | 0.00001157407 d |
| Week | wk | 1 wk = 604,800 s | 0.000001653439 wk |
| Month (average) | mo | 1 mo = 2,629,800 s | 3.802571×10⁻⁷ mo |
| Year (365.25 days) | yr | 1 yr = 31,557,600 s | 3.168809×10⁻⁸ yr |
| Decade | decade | 1 decade = 315,576,000 s | 3.168809×10⁻⁹ decade |
| Century | century | 1 century = 3,155,760,000 s | 3.168809×10⁻¹⁰ century |
| Millennium | millennium | 1 millennium = 31,557,600,000 s | 3.168809×10⁻¹¹ millennium |
Common mistakes when calculating Time
- Assuming every month has 30 days or every year has 365 days.
- Forgetting that a week is exactly 7 days.
- Using these average values for calendar date arithmetic, where leap years and month lengths matter.
Time FAQ
How many seconds are in a day?
86,400 seconds.
How many hours are in a year?
A 365-day year has 8,760 hours. The average Julian year used here has 8,766 hours.
How many days are in a month on average?
The average month is 30.4375 days when a year is 365.25 days.
What is the base unit for time?
This converter uses second (s) as the common base unit: every value is first converted to it and then to the target unit.
How do I convert between two time units?
Choose the starting and target units, enter the value and read the result. By hand: convert to the base unit with the table, then divide by the target unit factor.
How many minutes are in 1 hour?
1 h = 60 min.
How many minutes are in 1 second?
1 s = 0.01666667 min.
How many hours are in 1 second?
1 s = 0.0002777778 h.
Which time units does this converter support?
It covers 13 units: second (s), millisecond (ms), microsecond (µs), nanosecond (ns), minute (min), hour (h), day (d), week (wk), month (mo), year (yr), decade (decade), century (century), millennium (millennium).
How accurate is the time converter?
Results are calculated at full double precision and shown to about 8 significant figures. Round the answer to the precision of your original measurement; a result cannot be more accurate than the number you started with.
More in Time converters
- Weeks to Days Converter
- Seconds to Years Converter
- Weeks to Hours Converter
- Seconds to Weeks Converter
- Weeks to Minutes Converter
- Weeks to Seconds Converter
See all time converters tools · All Conversion calculators · Site map
Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the second