Dating Age Range Calculator

It's a rule of thumb for the youngest person you can reasonably date: divide your age by two and add seven. Reversing it — subtract seven from your age and double the result — gives the oldest. A 30-year-old's range is therefore 22 to 46.

The earliest known version appears in Max O'Rell's 1901 book Her Royal Highness Woman and His Majesty Cupid, where “half your age plus seven” was framed as the ideal age of a bride, not a minimum. During the 20th century it flipped into the modern lower-bound rule of thumb.

No. It's a social convention, and research on real dating preferences shows people don't follow it symmetrically — studies discussed in Psychology Today found men's preferences in particular don't track the rule's upper bound. Treat it as a conversation-starter, not evidence about any specific relationship.

The formula is asymmetric — each person has their own range — but a couple is “inside the rule” when the younger partner is at or above the older partner's floor of half-plus-seven. That single check is equivalent to testing both directions, and it's what this calculator reports.

Absolutely not. The rule is an informal social guideline and has no legal meaning. Age-of-consent and related laws vary by country and state and always take precedence — for adults, the rule is only ever about social perception.

The rule labels wide gaps “outside the range,” but among adults it's simply a perception heuristic. If you want the exact size of a gap rather than a social verdict, use our age difference calculator to get it in years, months, and days.