Standard deviation calculator
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Calculate standard deviation online
Standard deviation is a statistical measure that quantifies the amount of variation or dispersion in a dataset. Our calculator provides both sample and population standard deviation, along with visualizations to help understand your data's distribution.
Calculate sample and population standard deviation
Visualize data distribution
Works with large datasets
Instant results
No software installation needed
Export results easily
How to calculate standard deviation
- Upload data
Upload or paste your data into the calculator - Select column
Select the column containing your numerical data - View results
View the sample and population standard deviation results - Analyze distribution
Analyze the data distribution visualization - Export results
Export or copy the results as needed
Standard deviation examples
Normal distribution
A normal distribution shows how standard deviation measures spread in bell-shaped data.
Sample statistics:
- Sample standard deviation: 0.9856
- Population standard deviation: 0.9852
- Mean: -0.0051
Uniform distribution
A uniform distribution between -3 and 3 shows how standard deviation measures spread in bounded data.
Sample statistics:
- Sample standard deviation: 1.7505
- Population standard deviation: 1.7497
- Mean: -0.0406
Bimodal distribution
A bimodal distribution shows how standard deviation captures spread in multi-peaked data.
Sample statistics:
- Sample standard deviation: 2.0610
- Population standard deviation: 2.0600
- Mean: 0.0054
MT cars
Motor Trends Car Road Tests dataset.
filename
mtcars.parquet
rows
32
Flights 1m
1 Million flights including arrival and departure delays.
filename
flights-1m.parquet
rows
1000000
Iris
Iris plant species data set.
filename
iris.parquet
rows
50
House price
Housing price dataset.
filename
house-price.parquet
rows
545
Weather
Weather dataset with temperature, rainfall, sunshine and wind measurements.
filename
weather.parquet
rows
366