Half Your Age Plus 7: The Dating Age Rule Explained
Half your age plus 7 is a folk guideline for age-appropriate dating between adults: divide your age by two and add seven to get a suggested minimum partner age, and subtract seven from your age and double it to get a suggested maximum. It is social shorthand — not a scientific, legal or moral standard — and this page explains the formula, its disputed origins and the criticisms, neutrally.
What the rule says
The rule defines a minimum and a maximum suggested partner age for a given adult age:
Minimum = your age ÷ 2 + 7
Maximum = (your age − 7) × 2
At 30, the suggested range is 22–46. At 32 it is 23–50. At 40 it is 27–66. The two formulas mirror each other: if the rule sets your minimum at X, then a partner of age X would compute a maximum equal to your age — the range is symmetric from both sides.
Half Your Age Plus Seven
Spelled out, half your age plus seven is the same age gap rule under a longer name — in conversation, people sometimes describe it simply as the rule for dating age ranges. The wording varies; the two formulas stay identical.
How to calculate your range
Five steps, with a worked example at age 30:
- Take your age as a whole number: 30.
- Divide it by two: 30 ÷ 2 = 15.
- Add seven: 15 + 7 = 22 — the suggested minimum.
- Subtract seven from your age and double it: (30 − 7) × 2 = 46 — the suggested maximum.
- Read the range: 22 to 46. When the minimum falls below 18, this site shows 18, since only adult ages are discussed.
Prefer the numbers instantly? The quick calculator below applies the formulas for you, or use the dedicated page to check your dating age range.
Dating age rule · 18+ only
The half-your-age-plus-7 rule is a folk guideline, not legal, medical or relationship advice. Results are for reference only. See our Terms and disclaimer.
Where the rule came from
The formula is commonly traced to early twentieth-century print, where it circulated as a humorous maxim about socially acceptable age differences rather than serious guidance. It spread through popular culture over the following decades and is now one of the most cited — and most debated — rules of thumb about age gaps between adults. Precise first-use claims vary between sources, so this page avoids attributing it to a single origin.
Supporters and critics
Public conversation about the rule falls into two broad camps, and both are presented here without taking a side:
What supporters say
Fans of the rule treat it as a simple, memorable heuristic that keeps both partners within a broadly similar life stage. The formula is symmetric — it produces the same range from either person's perspective — which gives it a fairness argument that many other shorthand rules lack.
What critics say
Critics point out that the rule has no empirical basis: no research links the specific formula to relationship quality or outcomes. They note it says nothing about maturity, consent, shared values or compatibility, and that reducing any pairing to arithmetic ignores the individuals involved. Some also observe that the rule is applied inconsistently in practice, often more strictly to some pairings than others.
The honest summary: the rule survives because it is easy to remember, not because it is validated. Whether any specific pairing of adults makes sense depends on the people — a point both supporters and critics usually accept. For the practical side of pairings with a notable gap, see our guide to age gap couples.
Related pages
- Dating age calculator
Compute the rule’s range for any adult age, including an optional partner-age check.
- What is an acceptable age gap?
How people talk about acceptable age gaps between adults, and common misconceptions.
- Dating age range table
The minimum and maximum ages from the rule for every age from 18 to 60.
Rule and limits FAQ
What is the half your age plus 7 rule?
It is a folk guideline for dating age ranges. Take your age, divide it by two, and add seven — that gives the suggested minimum partner age. Subtract seven from your age and double it for the suggested maximum. It circulates as a social rule of thumb, not a scientific or legal standard.
Where did the half your age plus 7 rule come from?
The formula is commonly traced to early twentieth-century print, where it appeared as a humorous maxim rather than serious advice. It spread through popular culture over the following decades and now circulates widely as shorthand in discussions about age gaps between adults.
What is an appropriate age to date?
There is no single appropriate age to date; views differ across cultures, families and individuals. What is broadly consistent is that dating decisions belong to adults, and this site only discusses ages 18 and above. The half-your-age-plus-7 rule is one informal benchmark people use, not a standard.
What are the age limits for dating?
Legally, rules about ages and relationships vary by jurisdiction, and this site does not give legal advice. Socially, the half your age plus 7 formula is the most cited informal limit: minimum = your age ÷ 2 + 7, maximum = (your age − 7) × 2, computed for adults. Treat it as shorthand, not authority.
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