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Risk Difference Calculator

Compute risk difference RD = p₁ − p₂ between two groups.

Input Data

Input Exposed rate p₁.
Input Control rate p₂.

Results

0.2
RD = p₁ − p₂.

At a glance:Risk Difference Calculator: enter parameters to compute results; complements related calculators.

Formula

RD = p₁ − p₂.

How to Use

  1. Enter exposed and control event rates.
  2. It returns the absolute risk difference.

Case Studies

p₁=0.3, p₂=0.1 → RD=0.2

RD = 0.3 − 0.1 = 0.2 (absolute risk increase 20%).

FAQ

RD vs RR?

RD is an absolute (subtractive) difference; RR is a relative ratio.

Related Tools

References

Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.

Found a problem with the results?

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