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Time Conversion Table
Values shown for 1 Second
About Time Conversions
Time spans twelve orders of magnitude here, from nanoseconds (billionths of a second, the scale of a single CPU cycle) up to centuries. Most of the relationships are exact and familiar: 60 seconds to a minute, 3,600 to an hour. Months and years are the trap, because their length depends on definition. The figures below use the Julian year of exactly 365.25 days, the same year behind the astronomical light-year, and the Julian month of 30.4375 days, one-twelfth of that. Pinning those values avoids the 28-to-31-day swing of calendar months.
| Unit Name | Symbol | Value | Formula |
|---|---|---|---|
| Century | c | 3.16881 × 10⁻¹⁰ | multiply by 3,155,760,000 (100 Julian years) |
| Day | d | 0.0000115741 | multiply by 86,400 |
| Decade | dec | 3.16881 × 10⁻⁹ | multiply by 315,576,000 (10 Julian years) |
| Hour | h | 0.000277778 | multiply by 3600 |
| Julian Month | mo | 3.80257 × 10⁻⁷ | multiply by 2,629,800 (365.25 days / 12) |
| Julian Year | yr | 3.16881 × 10⁻⁸ | multiply by 31,557,600 (365.25 × 86,400) |
| Microsecond | μs | 1000000 | divide by 1,000,000 |
| Millisecond | ms | 1000 | divide by 1000 |
| Minute | min | 0.0166667 | multiply by 60 |
| Nanosecond | ns | 1000000000 | divide by 1,000,000,000 |
| Second | s | 1 | base unit |
| Week | wk | 0.00000165344 | multiply by 604,800 |