Security Control Coverage
Free Security Control Coverage calculator with clear step-by-step results.
About Security Control Coverage
Coverage counts controls in place; effectiveness counts those working.
Formula
Formula
Coverage = implemented ÷ total; effectiveness = effective ÷ total
Worked example
With the default values below, Security Control Coverage returns Coverage (%) of 75.0%. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Controls implementedminimum 0
- 30
- Total required controlsminimum 1
- 40
- Controls operating effectivelyminimum 0
- 25
Results
- Coverage (%)
- 75.0%
- Effectiveness (%)
- 62.5%
- Gaps
- 15.00
Step by step
- 1Values used
- 2Formula
- 3Coverage (%)= 75.0
- 4Effectiveness (%)= 62.5
- 5Gaps= 15
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How does this calculator work?
Coverage counts controls in place; effectiveness counts those working.
Why does this matter?
Coverage without effectiveness is a false sense of safety.