There will be some 7.75 billion people living on Earth on New Year's Eve, Germany's Foundation for World Population (DSW) estimates.

That is the frightening calculation from Germany's Foundation for World Population (DSW), who estimate our population will hit 7.75 billion by New Year's Eve.

That means the population increases by an average of 2.6 people every second - a figure that represents the number of births minus the number of deaths.

It is estimated that the billion person milestone was only reached in 1804. By 1960 the Earth had three billion people.

The mark of 8 billion people on Earth will probably be reached in 2023 - a 250 per cent increase over just 63 years.

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The world's population is estimated to have risen by 83 million in 2019. Credit: AP

The foundation says women in Africa are currently having an average of 4.4 children, two more than the global average of 2.4 children.

According to current United Nations forecasts, the population in Africa will grow from the current 1.3 billion people to 2.5 billion by 2050.