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

  1. Upload data
    Upload or paste your data into the calculator
  2. Select column
    Select the column containing your numerical data
  3. View results
    View the sample and population standard deviation results
  4. Analyze distribution
    Analyze the data distribution visualization
  5. 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

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