Maternal Mortality Ratio Calculator

Work out maternal mortality ratio instantly with clear inputs, formula shown and shareable results.

About Maternal Mortality Ratio Calculator

Divides maternal deaths by live births and expresses the result per 100,000, the standard maternal mortality ratio.

Formula

Maternal mortality ratio

MMR = maternal deaths / live births x 100,000; the SDG 3.1 global target is below 70

Worked example

With the default values below, Maternal Mortality Ratio Calculator returns Maternal mortality ratio of 60.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Maternal deathsaccepts 0–100,000: 30
Live birthsaccepts 1–100,000,000: 50,000

Results

Maternal mortality ratio: 60.00 per 100,000 live births
Ratio per 10,000 live births: 6.000
Live births per maternal death: 1,667
SDG comparison: At or below the SDG 3.1 global target of 70 per 100,000

Step by step

1Values used
2Maternal mortality ratio
3Maternal mortality ratio= 60.00 per 100,000 live births
4Ratio per 10,000 live births= 6.000
5Live births per maternal death= 1,667
6SDG comparison= At or below the SDG 3.1 global target of 70 per 100,000

Assumptions and limits

The result is derived only from the 2 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 3 decimal places, 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

Ratio or rate?

The ratio uses live births as the denominator; the maternal mortality rate uses women of reproductive age.

Which deaths count?

Deaths during pregnancy or within 42 days of its end from causes related to or aggravated by the pregnancy.