Skewness Calculator
Measure the lean of a distribution, left or right.
Enter your values
ⓘ Live results
Results
- Skewness (g₁)
- 1.4124
- Adjusted Fisher-Pearson skew
- 1.6749
- Direction
- Right-skewed (long right tail)
- Strength
- Highly skewed
- Pearson's second coefficient
- 1.1641
- Mean vs median
- 5.5 vs 4
Quick answer
Skewness measures asymmetry: a positive value means a long right tail, a negative value a long left tail, and zero a symmetric distribution.
g₁ = Σ(x − x̄)³ ÷ (n·s³)
How to use the Skewness Calculator
- 1Paste your dataset.
- 2Read the sign for direction and the magnitude for strength.
- 3Cross-check with the mean-versus-median gap, which points the same way.
Worked example
Using the values the calculator loads with:
Inputs
- Data values2, 3, 3, 4, 4, 4, 5, 6, 9, 15
Results
- Skewness (g₁)1.4124
- Adjusted Fisher-Pearson skew1.6749
- DirectionRight-skewed (long right tail)
- StrengthHighly skewed
- Pearson's second coefficient1.1641
- Mean vs median5.5 vs 4
Frequently asked questions
What counts as badly skewed?
Beyond ±1 is usually considered high; many tests assume roughly symmetric data, so consider a log transform.
Which formula do you use?
Both: the moment coefficient g₁ and the adjusted Fisher-Pearson version that Excel's SKEW function reports.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.