Second to Year (Avg) (s to yr)
Result
3.168873851e-8 Year (Avg)
Formula
yr = s × 3.168873851e-8
1 s = 3.168873851e-8 yr, and 1 yr = 31,556,952 s.
The second is the SI base unit, defined by a caesium-133 transition frequency. Minutes, hours, days and weeks are exact multiples. Month and year here are Gregorian averages: a year of 365.2425 days and a month of one twelfth of that (30.436875 days).
Worked examples
- 1 s × 3.168873851e-8 = 3.1688739e-8 yr
- 10 s × 3.168873851e-8 = 3.1688739e-7 yr
- 100 s × 3.168873851e-8 = 0.000003168874 yr
Common mistakes
- Calendar months run from 28 to 31 days, so "3 months" from a given date is not 3 × 30.44 days. Use a date calculator for deadlines.
- A 365-day year, a 365.25-day Julian year and the 365.2425-day Gregorian year differ; interest and astronomy calculations specify which one they use.
Second to Year (Avg) table
| Second (s) | Year (Avg) (yr) |
|---|---|
| 1 | 3.1688739e-8 |
| 2 | 6.3377477e-8 |
| 5 | 1.5844369e-7 |
| 10 | 3.1688739e-7 |
| 20 | 6.3377477e-7 |
| 50 | 0.000001584437 |
| 100 | 0.000003168874 |
| 1,000 | 0.000031688739 |
The units
- Second (s)
- A unit of time.
- Year (Avg) (yr)
- 1 Year (Avg) = 31,556,952 Second.
Sources for these factors
- The International System of Units (SI Brochure), 9th edition — BIPM
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy