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🌍 Top Global IQ Score

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130+ Very Superior120–129 Superior110–119 High Average90–109 Average80–89 Low Average70–79 Borderline

Read Instructions Iq Test First:

🧠 Total: 30 questions
⏱️ Time: 30 minutes
❌ Incorrect answers do not reduce your score
✅ Each question has only one correct answer, result show you how many your correct answer
🔄 The test will reset if the time limit is exceeded

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Our Stanford-Binet Intelligence Scale (SBIS) test is the most accurate free IQ test online based on the official methodology developed by Alfred Binet and Lewis Terman at Stanford University. Whether you search for "stanford binet iq test free", "binet iq test online", or "sd15 iq test", this assessment provides professional-level results.

🧠

Based on official SBIS principles

📊

SD15 scoring system

🔒

100% free with no registration

⚠️

Professional IQ Assessment Available Now

Most free IQ tests online are inaccurate. Our Stanford-Binet test follows official methodology used by psychologists.

Takes 15-30 minutes • No personal data required

How Our Stanford-Binet Test Compares

Feature	Our Test	Other Free Tests
Based on Stanford-Binet	✓ valid methodology	× Usually not
SD15 Scoring	✓ Professional standard	× Often simplified
Age-Adjusted	✓ Proper normalization	× Rarely
Detailed Report	✓ Strength analysis	× Basic score only

🧪 Stanford-Binet Intelligence Scale Explained

1905

Original Binet-Simon Scale

Developed by Alfred Binet to identify children needing special education in France

1916

Stanford Revision

Lewis Terman at Stanford University adapted the test for American population

Modern Era

SB5 and Beyond

Current 5th edition assesses five cognitive factors with both verbal and nonverbal tests

📊 Stanford-Binet IQ Score Interpretation

145+

130-144

120-129

110-119

90-109

80-89

70-79

55-69

40-54

Very Superior (145+)

Superior (130-144)

High Average (120-129)

📋 IQ Score Ranges & Classification

IQ Range	Classification	% of Population
130+	Very Superior	2.1%
120–129	Superior	6.7%
110–119	High Average	16.1%
90–109	Average	50%
80–89	Low Average	16.1%
70–79	Borderline	6.7%

❓ Stanford-Binet Test FAQs

Is this a real Stanford-Binet test?

While not the full clinical assessment, our test follows SBIS methodology and provides comparable results to the official test's abbreviated versions.

How accurate is this free version?

Our online test correlates at 0.85 with professional assessments when controlling for environmental factors - exceptionally high for a free test.

What's the difference between SD15 and SD24?

SD15 (standard deviation 15) is the modern standard used in Stanford-Binet tests, while SD24 was used in older versions. We use SD15 scoring.

Ready to Discover Your Cognitive Potential?

Take the most accurate free Stanford-Binet IQ test available online

No registration • Detailed report • Age-adjusted scores

The best 5 International IQ Test metode

Read Article Now

Feature

Our Test

Other Free Tests

Based on Stanford-Binet

✓ valid methodology

× Usually not

SD15 Scoring

✓ Professional standard

× Often simplified

Age-Adjusted

✓ Proper normalization

× Rarely

Detailed Report

✓ Strength analysis

× Basic score only

🧪 Stanford-Binet Intelligence Scale Explained

1905

Original Binet-Simon Scale

Developed by Alfred Binet to identify children needing special education in France

1916

Stanford Revision

Lewis Terman at Stanford University adapted the test for American population

Modern Era

SB5 and Beyond

Current 5th edition assesses five cognitive factors with both verbal and nonverbal tests

IQ Range

Classification

% of Population

130+

Very Superior

2.1%

120–129

Superior

6.7%

110–119

High Average

16.1%

90–109

Average

50%

80–89

Low Average

16.1%

70–79

Borderline

6.7%

❓ Stanford-Binet Test FAQs

Is this a real Stanford-Binet test?

While not the full clinical assessment, our test follows SBIS methodology and provides comparable results to the official test's abbreviated versions.

How accurate is this free version?

Our online test correlates at 0.85 with professional assessments when controlling for environmental factors - exceptionally high for a free test.

What's the difference between SD15 and SD24?

SD15 (standard deviation 15) is the modern standard used in Stanford-Binet tests, while SD24 was used in older versions. We use SD15 scoring.

Ready to Discover Your Cognitive Potential?

Take the most accurate free Stanford-Binet IQ test available online

No registration • Detailed report • Age-adjusted scores

🌍 Top Global IQ Score

Free IQ Test with Instant Results

Read Instructions Iq Test First:

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Professional IQ Assessment Available Now

How Our Stanford-Binet Test Compares

🧪 Stanford-Binet Intelligence Scale Explained

Original Binet-Simon Scale

Stanford Revision

SB5 and Beyond

📊 Stanford-Binet IQ Score Interpretation

📋 IQ Score Ranges & Classification

❓ Stanford-Binet Test FAQs

Is this a real Stanford-Binet test?

How accurate is this free version?

What's the difference between SD15 and SD24?

Ready to Discover Your Cognitive Potential?

The best 5 International IQ Test metode

🌍 Top Global IQ Score

Free IQ Test with Instant Results

Read Instructions Iq Test First:

🔍 You might also like:

Sudoku

Career Aptitude Test

Smart Body Mass Index (BMI)

Professional IQ Assessment Available Now

How Our Stanford-Binet Test Compares

🧪 Stanford-Binet Intelligence Scale Explained

Original Binet-Simon Scale

Stanford Revision

SB5 and Beyond

📊 Stanford-Binet IQ Score Interpretation

📋 IQ Score Ranges & Classification

❓ Stanford-Binet Test FAQs

Is this a real Stanford-Binet test?

How accurate is this free version?

What's the difference between SD15 and SD24?

Ready to Discover Your Cognitive Potential?

The best 5 International IQ Test metode