1. What is IQ?

IQ (Intelligence Quotient) is a score derived from standardized tests designed to measure human intelligence. The original IQ formula compares mental age to chronological age.

2. How Does the IQ Calculator Work?

The calculator uses the original IQ formula:

Where:

• Mental Age — The age level of cognitive abilities
• Chronological Age — The actual age in years

Explanation: If a 10-year-old has the cognitive abilities of a 12-year-old, their IQ would be (12/10)×100 = 120.

3. Understanding IQ Scores

IQ Classification:

• 130+ — Very Superior (Gifted)
• 120-129 — Superior
• 110-119 — High Average
• 90-109 — Average
• 80-89 — Low Average
• 70-79 — Borderline
• Below 70 — Extremely Low

4. Using the Calculator

Tips: Enter mental age and chronological age in years. Both values must be positive numbers. The calculator will provide both the IQ score and classification.

5. Frequently Asked Questions (FAQ)

Q1: Is this the only way to calculate IQ?
A: Modern IQ tests use deviation IQ with a mean of 100 and standard deviation of 15, but this calculator shows the original conceptual formula.

Q2: What's considered a "normal" IQ?
A: About 68% of people score between 85-115, which is considered the normal range.

Q3: Can IQ change over time?
A: Yes, IQ can change, especially in childhood, due to education, environment, and other factors.

Q4: What are the limitations of IQ tests?
A: They measure specific cognitive abilities, not overall intelligence or potential. Cultural bias and test conditions can affect results.

Q5: How accurate is this simple calculator?
A: This demonstrates the concept, but professional IQ tests use more sophisticated methods with multiple subtests.