Milliseconds to years
Convert milliseconds through seconds, days, years, centuries, and a millennium.

Details
Convert milliseconds through seconds, days, years, centuries, and a millennium. A month is treated as 30.436875 days and a year as 365.2425 days. A millennium is 1000 of those years. It is not a calendar of named dates.

Category: Calculate
Page: /tools/time-span
Text: /tools/time-span.txt

Limits
A month is 30.436875 days. A year is 365.2425 days. A millennium is 1000 of those years, not a calendar lookup.

Steps
1. Enter an amount.
2. Pick milliseconds or another unit.
3. Read the rest of the scale.

Questions
Does a year include leap days?
The year used here is the average Gregorian year, 365.2425 days.

Is a millennium 1000 years?
Yes, using that average year.

Nothing is uploaded. Closing the tab drops the file.
The math stays in the page.