How this calculator works
Match deaths and denominators to the same place, period and case definition. The maternal output is conventionally called a mortality ratio because it uses live births. Proportionate mortality describes the share of deaths, not population risk. Inverse modes rearrange the selected ratio without rounding estimated counts. The result is an estimate for information only and is not medical advice.
Formula
Crude rate = deaths / mid-period population × selected scale. Infant mortality = infant deaths / live births × 1000. Maternal ratio = maternal deaths / live births × 100 000. Proportionate mortality = cause deaths / all deaths × 100.
Worked example
Ten deaths among 1000 residents give 10 per 1000. Two infant deaths per 500 live births give 4 per 1000. Three maternal deaths per 10 000 live births give 30 per 100 000.
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Frequently asked questions
Which maternal deaths belong in the numerator?
Use a specified surveillance definition, commonly deaths during pregnancy or within 42 days from a cause related to or aggravated by pregnancy. Incidental deaths are excluded.
Can proportionate mortality compare population risk?
No. It depends on deaths from all other causes as well as the cause of interest.
Is this age-standardized mortality?
No. Age standardization requires age-specific rates and a standard population, which are outside this ratio calculator.