In 1 decades there are 315,569,520 seconds. Meanwhile in 1 seconds there are 3.16887e-9 decades. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Seconds to Decades calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert decades to seconds, break the time down step by step, then multiply.
seconds = decades × 10 × 365 × 24 × 60 × 60
That means:
seconds = decades × 10 × 365.25 × 24 × 60 × 60
That means:
Tip: Pick 365 days for simple estimates. Pick 365.25 days for a more accurate decade-to-seconds conversion over long time spans.
A decade is 10 years. The exact seconds depend on how many leap years fall inside those 10 years. A good estimate uses an average year length of 365.2425 days.
Use this formula:
seconds = decades × years-per-decade × days-per-year × 24 × 60 × 60
Most of the time:
If you treat every year as 365 days:
Formula: seconds = decades × 315,360,000
Accuracy depends on what the decade represents.
A decade that includes more leap years will have more seconds.
0.5 decades equals 5 years.
2 decades equals 20 years.
No. That number assumes 10 years of 365 days each. Real decades often include leap years, which add extra days and seconds.
Each extra day adds:
Most 10-year spans include 2 or 3 leap years. It depends on the start and end years. Leap years usually happen every 4 years, with a special rule for century years.
A decade with 2 leap days has:
A decade with 3 leap days has:
Calendar years vary because of leap years. If you convert “10 calendar years” from real dates, the count of leap days inside that window can change. That shifts the total seconds.
Yes. Scientific notation is handy for large values.
Use exact dates and times (with time zone if needed). Count the days and leap days between those timestamps, then convert days to seconds. This avoids confusion from averages.
The Calculate Box tool to convert decades to seconds uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a decades value in the box and have it instantly converted to seconds.