Percentile 51 = IQ 100

IQ Test › IQ Percentile › 51
100
Smarter than 51% of people
100 · 50.0%55100145
Average
Average range, where about half of people score · Rarer than 1 in 2

Percentile 51 = IQ 100. Smarter than 51% of people. Classification: Average — Average range, where about half of people score. Rarer than 1 in 2.

IQClassificationPercentile
100Average50.0%
120Superior90.9%
130Very Superior / Gifted97.7%

❓ FAQ

What percentile is an IQ of 100?
An IQ of 100 sits at the 51.0th percentile — the top 49.0% of the population. Roughly 1 in 2 people score this high.
How many people have an IQ of 100 or higher?
Roughly 3,969,000,000 people worldwide — about 49.0% of 8.1 billion.
← Percentile 50Percentile 52 →
Calculate →

🔗 Average IQ by Country — Estimates & What They Really Mean

📅 Last updated: 2026-06-18 · ✔ Reviewed by the All-Lifes editorial team · About · Methodology
📚 Sources & references
🧠 Measure Your Own IQ →