IQ follows a normal distribution with mean 100 and SD 15 (Wechsler scale). Most people score 85–115.
IQ 130+ (top 2.3%) qualifies for Mensa. IQ 145+ is rarer than 1 in 1,000 people.
This tool is most useful when you need a result you can trust without double-checking. It applies the correct formula automatically and handles edge cases that trip up manual calculation.
Many errors with practical calculators arise from not reading the result in context. A number without units, without scale, or without comparison against a reference range is hard to interpret correctly.
A student planning their revision schedule uses the calculator to distribute a fixed number of study hours across multiple subjects based on weighting, ensuring the time allocation matches the importance of each topic in the final assessment.
Mensa requires an IQ in the top 2% — typically 130+ on Wechsler or 132+ on Stanford-Binet.
CalcPlanet – Free Online Calculators
725+ free calculators and 108 tools for math, money, health, and everyday life. Instant results, verified formulas, no sign-up.
By CalcPlanet Editorial · Reviewed against our Editorial Standards and Formula Sources.
CalcPlanet calculators are free, privacy-first, and formula-reviewed.
Editorial Standards · Formula Sources · Privacy · Terms · Contact
