Converting Time
Convert between seconds, minutes, hours, days, and more.
Table of Contents
Time Converter
Time Converter Charts
Seconds, Milliseconds, Microseconds and Nanoseconds
Below the relationships between seconds, milliseconds, microseconds, and nanoseconds:
| Unit | Seconds (s) | Milliseconds (ms) | Microseconds (µs) | Nanoseconds (ns) |
|---|---|---|---|---|
| 1 Second | 1 s | 1,000 ms | 1,000,000 µs | 1,000,000,000 ns |
| 1 Millisecond | 0.001 s | 1 ms | 1,000 µs | 1,000,000 ns |
| 1 Microsecond | 0.000001 s | 0.001 ms | 1 µs | 1,000 ns |
| 1 Nanosecond | 0.000000001 s | 0.000001 ms | 0.001 µs | 1 ns |
Seconds to Minutes to Hours
3600 seconds equal 60 minutes, which is equivalent to 1 hour.
| Seconds (s) | Minutes (min) | Hours (h) |
|---|---|---|
| 60 | 1 | 0.01667 |
| 120 | 2 | 0.03333 |
| 300 | 5 | 0.08333 |
| 600 | 10 | 0.16667 |
| 3600 | 60 | 1 |
| 7200 | 120 | 2 |
Seconds to Days
Conversion Factor: 1 day = 86400 seconds
| Seconds (s) | Days (d) |
|---|---|
| 86400 | 1 |
| 172800 | 2 |
| 259200 | 3 |
| 432000 | 5 |
| 864000 | 10 |
Calendar-Based Conversions (Large Time Spans)
This table converts larger units into seconds to help users understand the magnitude of time spans.
| Unit | Approximate Seconds | Explanation |
|---|---|---|
| 1 Month | 2,628,000 s | Average month (30.44 days) |
| 1 Year | 31,536,000 s | Average year (365.25 days) |
| 1 Decade | 315,360,000 s | 10 years |
| 1 Century | 3,153,600,000 s | 100 years |
| 1 Millennium | 31,536,000,000 s | 1000 years |
Days to Years, Decades, and Centuries
This table provides a quick reference for converting days into larger calendar units.
Example: 3650 days ≈ 10 years, or 1 decade. Example: 1 Year ≈ 31,536,000 seconds
| Days (d) | Years (approx.) | Decades (approx.) | Centuries (approx.) |
|---|---|---|---|
| 365 | 1 | 0.1 | 0.01 |
| 730 | 2 | 0.2 | 0.02 |
| 1825 | 5 | 0.5 | 0.05 |
| 3650 | 10 | 1 | 0.1 |
| 7300 | 20 | 2 | 0.2 |
Additional Informations
Categories and Notable Time Units
Standard Time Units
- Core Units: Second, Millisecond (1×10−3), Microsecond (1×10−6), and Nanosecond (1×10−9) are used for very short intervals in scientific and technological applications.
- Everyday Units: Minute, Hour, Day, and Week are used for routine scheduling and timekeeping.
Calendar-Based Units (Approximate)
- Month: Approximately 2.628×106 seconds (about 30.44 days).
- Year: Approximately 3.154×107 seconds (about 365.25 days).
- Decade, Century, Millennium: Larger units that scale the concept of a year over 10, 100, or 1000 years.
Astronomical and Specialized Units
Astronomical Variants:
- Month_synodic: Approximately 2.3606×106 seconds, representing the lunar cycle.
- Year_julian: Approximately 3.15576×107 seconds, based on a Julian year (365.25 days).
- Other approximations such as Year_leap, Year_tropical, and Year_sidereal account for different calendar and astronomical standards.
- Units like Day_sidereal, Hour_sidereal, Minute_sidereal, and Second_sidereal reflect Earth’s rotation relative to the stars.
Uncommon and Historical Units:
- Fortnight: Approximately 1.2096×106 seconds, representing 14 days.
- Other historical periods like septennial, octennial, novennial, quindecennial, and quinquennial denote durations of 7, 8, 9, 15, and 5 years, respectively.
Fundamental and Theoretical Units:
- Shake: 1×10−8 seconds, used in nuclear physics to describe very short intervals.
- Planck Time: Approximately 5.39×10−44 seconds, representing the smallest measurable unit of time according to quantum theory.