Variance calculator

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Calculate variance online with ease

Our variance calculator helps you analyze the spread of your data by computing both sample and population variance. Visualize your data distribution and get additional statistical measures to better understand your dataset.

Calculate sample and population variance

Visualize data distribution

Get additional statistics (mean, standard deviation)

Handle large datasets efficiently

Export results and visualizations

How to calculate variance online

  1. Upload your data file
    Upload your data in any of these formats: csv, parquet, tsv and json
  2. Select columns for analysis
    Choose the numerical columns you want to analyze from your uploaded dataset
  3. View variance results
    The calculator will automatically compute both sample variance (for data samples) and population variance (for complete datasets)
  4. Explore the visualization
    Examine the distribution plot to understand your data's spread and shape

Example distributions with different variances

Normal distribution

A normal distribution with mean 0 and standard deviation 1 shows typical variance patterns.

Sample statistics:

  • Sample variance: 0.9715
  • Population variance: 0.9705
  • Mean: -0.0051

Uniform distribution

A uniform distribution between -3 and 3 shows how variance measures spread in bounded data.

Sample statistics:

  • Sample variance: 3.0644
  • Population variance: 3.0614
  • Mean: -0.0406

Bimodal distribution

A bimodal distribution shows how variance captures spread in multi-peaked data.

Sample statistics:

  • Sample variance: 4.2477
  • Population variance: 4.2434
  • 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

CSV viewer

View and explore CSV files.

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