---
title: "Seconds to Years — s to yr converter"
description: "1 second = 3.169 × 10^-8 years. Convert seconds to years with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/seconds-to-years/
site: "At One Place"
---

# Seconds to years

**1 second in years: 1 s = 3.169 × 10^-8 yr**

yr = s × 3.168873851 × 10^-8

To convert seconds to years, multiply by 3.168873851 × 10^-8. The table below gives the values people look up most often, and the converter works for any number.

## Seconds to years table

*Common second values converted to years.*

| Seconds | Years |
| --- | --- |
| 1 s | 3.169 × 10^-8 |
| 2 s | 6.338 × 10^-8 |
| 3 s | 9.507 × 10^-8 |
| 4 s | 1.268 × 10^-7 |
| 5 s | 1.584 × 10^-7 |
| 10 s | 3.169 × 10^-7 |
| 15 s | 4.753 × 10^-7 |
| 20 s | 6.338 × 10^-7 |
| 25 s | 7.922 × 10^-7 |
| 30 s | 9.507 × 10^-7 |
| 40 s | 0.000001268 |
| 50 s | 0.000001584 |
| 75 s | 0.000002377 |
| 100 s | 0.000003169 |
| 250 s | 0.000007922 |
| 500 s | 0.00001584 |
| 1,000 s | 0.00003169 |

## How the conversion works

The relationship is yr = s × 3.168873851 × 10^-8. Both units measure time, so the conversion is a fixed factor that never changes.

> Year: Mean Gregorian year, 365.2425 days.

## Common questions

### How many years are in one second?

One second equals 3.169 × 10^-8 years. yr = s × 3.168873851 × 10^-8.

### How do you convert seconds to years?

Use yr = s × 3.168873851 × 10^-8. So 10 s is 3.169 × 10^-7 yr.

### How many seconds are in one year?

One year equals 31,556,952 seconds, which is the reverse of the conversion above.

### Is there more than one kind of year?

Mean Gregorian year, 365.2425 days.

## Related pages

- [Years to Seconds](https://atoneplace.net/convert/years-to-seconds/)
- [Seconds to Milliseconds](https://atoneplace.net/convert/seconds-to-milliseconds/)
- [Seconds to Minutes](https://atoneplace.net/convert/seconds-to-minutes/)
- [Seconds to Hours](https://atoneplace.net/convert/seconds-to-hours/)
- [Seconds to Days](https://atoneplace.net/convert/seconds-to-days/)
- [Seconds to Weeks](https://atoneplace.net/convert/seconds-to-weeks/)
- [Seconds to Months](https://atoneplace.net/convert/seconds-to-months/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)