Direct conversion
Convert year (average Gregorian) [yr] to common year [common yr] instantly with formula, examples, chart, and FAQs.
1 year (average Gregorian) [yr] = 1.000664 common year [common yr]
1 year (average Gregorian) [yr] = 1.000664 common year [common yr]
Example: 1 year (average Gregorian) [yr] equals 1.000664 common year [common yr].
Time conversions use second as the reference unit. Calendar-style values such as average month and average Gregorian year are approximate by definition.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-08-14.
A year is a calendar time unit; conversion pages use an average year for fixed calculations.
HistoryYears are based on Earth orbit and are organized through civil calendar systems.
Current useYears are used for age, finance, warranties, education, contracts, planning, and historical timelines.
The common year (common yr) is a time unit used to express measurements in this converter.
HistoryThis unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current useUse common year when comparing time values, checking specifications, converting between systems, or preparing quick estimates.
| year (average Gregorian) [yr] | common year [common yr] |
|---|---|
| 1 | 1.000664 |
| 2 | 2.001329 |
| 5 | 5.003322 |
| 10 | 10.006644 |
| 20 | 20.013288 |
| 25 | 25.01661 |
| 50 | 50.033219 |
| 100 | 100.066438 |
| 1000 | 1000.664384 |
Use this formula: 1 year (average Gregorian) [yr] = 1.000664 common year [common yr] Enter your value in the calculator and the result updates instantly.
1 year (average Gregorian) [yr] equals 1.000664 common year [common yr].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.