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Benford's law online calculator

1. Paste the data you want to check.

Try some sample data:

Soviet brochure, 1928
Population by country

2. Click 'check data'!

Benford's law states that real-world numbers start more often with a 1 than a 2, more often with 2 than 3 and so on. If your dataset does not follow this distribution, it might hint at human interference.

Find out more about Benford's law on Wikipedia.

Number of observations:

Sum of squared deviations:

Evidence of tampering:

Remember that math alone cannot prove fraud! This test must be complemented with other means of investigation.

The Benford's law calculator is a project by Journalism++Follow @jplusplus_

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