What TFR is needed for population replacement?

A TFR of approximately 2.1 in developed countries (higher in developing countries with higher mortality) is the replacement fertility level. Above this, population grows; below this, population shrinks over generations.

What is the global TFR trend?

The global TFR has fallen from about 5.0 in 1960 to approximately 2.3 in 2023. Sub-Saharan Africa remains above 4.5, while Europe and East Asia are mostly below 1.5, well under replacement.

Total Fertility Rate (TFR) Calculator

Calculate the Total Fertility Rate (TFR) as the sum of age-specific fertility rates (ASFR) across all reproductive age groups (15–49). TFR represents the average number of children a woman would have over her lifetime.

Data set — comma or newline separated

Statistical Results — n = 8

Count (n)8

Sum (Σx)40

Min2

Max9

Range7

Q14

Q35.5

IQR1.5

Mean (μ)5

Median4.5

Mode4

Pop. Variance (σ²)4

Pop. Std Dev (σ)2

Sample Variance (s²)4.571428571

Sample Std Dev (s)2.138089935

Skewness0.65625

Excess Kurtosis-0.21875

How It Works

Each component has a specific meaning:

All reproductive age groups — The all reproductive age groups recorded for the scenario being assessed.

Note: Interpret the tfr calculator result against the thresholds and context described above.

How to Use

Enter the all reproductive age groups for the scenario you are assessing. Calculate the Total Fertility Rate (TFR) as the sum of age-specific fertility rates (ASFR) across all reproductive age groups (15–49). TFR represents the average number of children a woman would have over her lifetime. Use the tfr calculator result to inform your calculation.

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