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Sex Ratio Calculator

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

About Sex Ratio Calculator

Sex ratio is conventionally expressed as females per 1,000 males. The child sex ratio for ages 0-6 is watched separately because it is unaffected by differential adult mortality and migration, making it the cleaner indicator of sex selection at birth.

Formulas

Sex ratio

Ratio = Female population / Male population x 1,000

Child sex ratio

Child ratio = Female children 0-6 / Male children 0-6 x 1,000

Worked example

With the default values below, Sex Ratio Calculator returns Sex ratio (females per 1,000 males) of 940.4. Change any input above and every figure here is recalculated in your browser.

Inputs used

Female population
586,500,000
Male population
623,700,000
Female children aged 0-6
75,800,000
Male children aged 0-6
82,900,000

Results

Sex ratio (females per 1,000 males)
940.4
Child sex ratio (0-6 years)
914.4
Female share of population
48.463%
Overall ratio minus child ratio
26.0

Step by step

  1. 1Values used
  2. 2Sex ratio
  3. 3Child sex ratio
  4. 4Sex ratio (females per 1,000 males)= 940.4
  5. 5Child sex ratio (0-6 years)= 914.4
  6. 6Female share of population= 48.463
  7. 7Overall ratio minus child ratio= 26.0

Assumptions and limits

  • The result is derived only from the 4 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.
  • Indicative estimate only. Fees, entitlements, limits and formulas vary by jurisdiction, statute, policy wording and the facts of the case. This is not legal, tax, insurance or financial advice — confirm with a qualified professional or the relevant authority.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Indicative estimate only. Fees, entitlements, limits and formulas vary by jurisdiction, statute, policy wording and the facts of the case. This is not legal, tax, insurance or financial advice — confirm with a qualified professional or the relevant authority.

Frequently Asked Questions

What is the natural sex ratio at birth?

About 950 females per 1,000 males, slightly favouring male births, which evens out later because male mortality is higher at every age.

Why is the child sex ratio a better indicator?

Because it excludes migration and adult mortality effects, so a low value points to sex-selective practices rather than other demographic forces.

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