Time conversion
1 julian year (a) equals 31,557,600,000 millisecond (ms). Enter any value below to convert from a to ms.
Enter a value and choose units. Results update instantly.
1 a = 31,557,600,000 ms
| Unit | Value |
|---|---|
| Nanosecond ns | 3.15576e16 |
| Microsecond μs | 3.15576e13 |
| Millisecond ms | 31,557,600,000 |
| Second s | 31,557,600 |
| Minute min | 525,960 |
| Hour h | 8,766 |
| Day d | 365.25 |
| Week wk | 52.1785714286 |
| Average Gregorian month mo | 12.0002464116 |
| Julian year a | 1 |
Formula
Use this relationship for a direct conversion:
2 a = 63,115,200,000 ms.
Use the Date Calculators for calendar months, leap years, daylight saving transitions, and business days.
Quick reference
| Julian year (a) | Millisecond (ms) |
|---|---|
| 0.01 | 315,576,000 |
| 0.1 | 3,155,760,000 |
| 1 | 31,557,600,000 |
| 2 | 63,115,200,000 |
| 5 | 157,788,000,000 |
| 10 | 315,576,000,000 |
| 25 | 788,940,000,000 |
| 50 | 1.57788e12 |
| 100 | 3.15576e12 |
| 1,000 | 3.15576e13 |
From unit
Exactly 365.25 days in astronomy.
Symbol: a
To unit
One thousandth of a second.
Symbol: ms
Keep converting
Source
Definitions are checked against BIPM SI Brochure: Units of time. Calculations use full internal precision before display rounding.
View the complete time converterQuestions
Use the formula ms = a x 31,557,600,000. 1 julian year (a) equals 31,557,600,000 millisecond (ms).
Both unit definitions use exact factors. Only the displayed decimal may be rounded.
