Convert Olympiads to Gregorian Years

Convert Olympiads (Ol) to Gregorian Years (yr) instantly and accurately.

Olympiads (Ol)
Gregorian Years (yr)

Conversion Formula

yr = Ol × 4

About Olympiads

An Olympiad = exactly 4 Gregorian years = 1,461 days = 126,227,808 s. In ancient Greece it was the standard historical dating system counting from the first Olympic Games at Olympia in 776 BCE; adopted by Hellenistic historians (Polybius, Timaeus). Modern Olympiads are numbered from Athens 1896. The 4-year cycle is mirrored in US presidential elections and EU Parliamentary terms. 1 Ol = 4 yr = 126,227,808 s.

About Gregorian Years

The Gregorian year = exactly 365.2425 days = 31,556,952 s (mean over the 400-year cycle with 97 leap years). The Julian calendar (45 BCE) used 365.25 days; Gregorian reform (1582) dropped 10 days and amended the centennial rule. Britain adopted it in 1752; Greece in 1923. Carbon-14 dates are reported in 'years BP' (before 1950 CE). 1 yr = 365.2425 d = 8,765.82 h = 31,556,952 s.

Quick Reference Table

Olympiads (Ol)Gregorian Years (yr)
1 Ol4 yr
2 Ol8 yr
5 Ol20 yr
10 Ol40 yr
25 Ol100 yr
50 Ol200 yr
100 Ol400 yr

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