Quick Answer: Coin flipping dates back to ancient Rome, where it was called "navia aut caput" meaning "ship or head" — referencing the images on Roman coins. It has been used for over 2,000 years as a fast, neutral decision-making tool.
Ancient Rome: Navia Aut Caput
The earliest documented coin flipping practice comes from ancient Rome, where it was called "navia aut caput" — literally "ship or head" in Latin. Roman coins depicted a ship on one side and the head of a ruler on the other. Romans would flip coins to settle disputes, make decisions, and even in legal proceedings. It was considered a form of divine guidance, as outcomes were believed to reflect the will of the gods.
Medieval and Renaissance Use
Throughout the medieval period, coin flipping continued as a common dispute-resolution mechanism across Europe. In England, it became known as "cross and pile" — referencing the cross on one side of English coins and the pile (the reverse face design). Medieval merchants used it to settle commercial disputes, and it appeared in legal contexts as a recognized form of impartial selection.
Sports Officiating
The modern use of coin flips in sports officiating became formalized in the 19th and 20th centuries. Major sports adopted it as the standard neutral method for deciding who gets first choice of ends, possession, or serve. Today, coin flips are used at the start of every Super Bowl, FIFA World Cup match, cricket test match, and countless other sporting events worldwide — specifically because of their universally recognized neutrality.
The Digital Revolution
With the advent of the internet and smartphones, digital coin flips became practical for remote decisions, online events, and situations where a physical coin is unavailable. Modern digital coin flippers use Cryptographically Secure Random Number Generators (CSPRNG) — the same mathematical standard as internet banking encryption — to produce results that are provably more fair than physical coins, which carry a measurable 0.8% starting-side bias.
Famous Coin Flips in History
- 1882: A coin flip decided which city would be named — Portland, Oregon won over what would have been Boston, Oregon
- 1917: A coin flip reportedly determined the starting quarterback for a key NFL playoff game
- 1969: The Apollo 11 mission had crew assignments partly decided by coin flip during early planning stages
- FIFA World Cup: Tie-deciding coin flips were used in the 1954 and 1962 World Cups before goal difference rules were introduced