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World Population: Past, Present, and Future

(move and expand the bar at the underside of the chart to navigate through time)

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The chart above illustrates how the world population has changed all through history.

At the dawn of agriculture, about 8000 B.C., the world's population was approximately 5 million. Over the 8,000 years up to 1 A.D., it grew to 200 million (some estimate 300 million or perhaps 600, suggesting how imprecise population estimates of early historical periods can be), with a growth rate of under 0.05% annually.

A tremendous change occurred with the industrial revolution: whereas it had taken all of human history until around 1800 for the world population to achieve one billion, the second billion was reached in mere 130 years (1930), the third billion in 30 years (1960), the fourth billion in 15 years (1974), and the fifth billion in just 13 years (1987).

  • During the 20th century alone, the world's population has grown from 1.65 billion to 6 billion.
  • In 1970, there have been roughly half as many folks within the world as there are now.
  • Because of declining growth rates, it'll now take over 200 years to double again.

Wonder how big was the world's population after you were born?
Check out this simple wizard or this more elaborated one to seek out

Sources:

Growth Rate

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The world population is currently (2020) growing at a rate of around 1.05% p.a (down from 1.08% in 2019, 1.10% in 2018, and 1.12% in 2017). The current average population increase is estimated at 81 million people per annum.

The annual growth rate reached its peak within the late 1960s when it was at around 2%. The rate of increase has nearly halved since then and can still decline within the coming years.

World population will therefore continue to grow in the 21st century, but at a much slower rate compared to the recent past. World population has doubled (100% increase) in 40 years from 1959 (3 billion) to 1999 (6 billion). It is now estimated that it will take another nearly 40 years to increase by another 50% to become 9 billion by 2037.

Therefore, the world population will continue to grow in the 21st century, but at a much slower rate compared to the recent past. The world population has doubled (100% increase) within 40 years from 1959 (3 billion) to 1999 (6 billion). It's now estimated that it'll take another nearly 40 years to extend by another 50% to 9 billion by 2037.

The latest world population projections show that the world population will reach 10 billion persons in 2057.

World Population (2020 and historical)

Year Population Yearly Change Fertility Urban Pop % Urban Population
2020 7,794,798,739 1.05% 2.47% 56.2% 4,378,993,944
2015 7,379,797,139 1.16% 2.52% 54.0% 3,981,497,663
2010 6,956,823,603 1.22% 2.58% 51.7% 3,594,868,146
2005 6,541,907,027 1.25% 2.65% 49.2% 3,215,905,863
2000 6,143,493,823 1.31% 2.78% 46.7% 2,868,307,513
1995 5,744,212,979 1.43% 3.01% 44.8% 2,575,505,235
1990 5,327,231,061 1.71% 3.44% 43.0% 2,290,228,096
1985 4,870,921,740 1.82% 3.59% 41.2% 2,007,939,063
1980 4,458,003,514 1.77% 3.86% 39.3% 1,754,201,029
1975 4,079,480,606 1.89% 4.47% 37.7% 1,538,624,994
1970 3,700,437,046 2.06% 4.93% 36.6% 1,354,215,496
1965 3,339,583,597 2.00% 5.02% 35.6% 1,188,469,224
1960 3,034,949,748 1.86% 4.90% 33.7% 1,023,845,517
1955 2,773,019,936 1.77% 4.97% 31.6% 877,008,842
Source: Worldstatistics (https://worldstatistics.live)
Elaboration of data by United Nations, Department of Economic and Social Affairs, Population Division. World Population Prospects: The 2019 Revision. (Medium-fertility variant).
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World Population Forecast (2020-2050)

Year Population Yearly Change Fertility Urban Pop % Urban Population
2020 7,794,798,739 1.05% 2.47% 56.2% 4,378,993,944
2025 8,184,437,460 0.98% 2.54% 58.3% 4,774,646,303
2030 8,548,487,400 0.87% 2.62% 60.4% 5,167,257,546
2035 8,887,524,213 0.78% 2.70% 62.5% 5,555,833,477
2040 9,198,847,240 0.69% 2.77% 64.6% 5,938,249,026
2045 9,481,803,274 0.61% 2.85% 66.6% 6,312,544,819
2050 9,735,033,990 0.53% 2.95% 68.6% 6,679,756,162

World Population Milestones

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10 Billion (2057)

The United Nations projects world population to succeed in 10 billion in 2057.

9 Billion (2037)

The world population is expected to reach 9 billion in the year 2037.

8 Billion (2023)

World population is anticipated to reach 8 billion people in 2023 in keeping with the United Nations (in 2026 according to the U.S. Census Bureau).

7.8 Billion (2020)

The current world population is 7.8 billion as of November 2020 [1] consistent with the foremost recent United Nations estimates elaborated by Worldstatistics. The term "World Population" refers to the human population (the total number of humans currently living).

7 Billion (2011)

According to the United Nations, the world population achieved 7 Billion on October 31, 2011.
The U.S. Census Bureau made a lower estimate, for which the world population reached 7 billion marks on March 12,2012

6 Billion (1999)

According to the United Nations, the 6 billion figure was achieved on October 12, 1999 (celebrated as the Day of 6 Billion). According to the U.S. Census Bureau instead, the six billion milestones was achieved on July 22, 1999, at about 3:49 AM GMT. Yet, according to the U.S. Census, the date and time of when 6 billion was achieved will probably change because the already uncertain guesstimate are constantly being updated.

Previous Milestones

  • 5 Billion: 1987
  • 4 Billion: 1974
  • 3 Billion: 1960
  • 2 Billion: 1930
  • 1 Billion: 1804

World Population by Region

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# Region Population Density(P/Km²) Land Area(Km²) World share
1 Asia 4,641,054,775 150 31,033,131 59.5%
2 Africa 1,340,598,147 45 29,648,481 17.2%
3 Europe 747,636,026 34 22,145,786 9.6%
4 Latin America and the Caribbean 653,960,906 32 20,139,452 8.4%
5 Northern America 368,869,647 20 18,651,660 4.7%
6 Oceania 42,677,813 5 8,486,460 0.5%

World Population Density (people/km2)

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Population density map of the world showing not only countries but also many subdivisions (regions, states, provinces). See also:

 World Population Density Courtesy of Junuxx at en.wikipedia [CC-BY-SA-3.0 or GFDL], via Wikimedia Commons

World Population by Religion

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According to a recent study (based on the 2010 world population of 6.9 billion) by The Pew Forum, there are:

  • 2,173,180,000 Christians (31% of world population), of which 50% are Catholic, 37% Protestant, 12% Orthodox, and 1% other.
  • 1,598,510,000 Muslims (23%), of which 87-90% are Sunnis, 10-13% Shia.
  • 1,126,500,000 No Religion affiliation (16%): atheists, agnostics and people who do not identify with any particular religion. One-in-five people (20%) in the United States are religiously unaffiliated.
  • 1,033,080,000 Hindus (15%), the overwhelming majority (94%) of which live in India.
  • 487,540,000 Buddhists (7%), of which half live in China.
  • 405,120,000 Folk Religionists (6%): faiths that are closely associated with a particular group of people, ethnicity or tribe.
  • 58,110,000 Other Religions (1%): Baha’i faith, Taoism, Jainism, Shintoism, Sikhism, Tenrikyo, Wicca, Zoroastrianism and many others.
  • 13,850,000 Jews (0.2%), four-fifths of which live in two countries: United States (41%) and Israel (41%).
Religions World Map

World Population by Country

No. Country Population Yearly Change Density (P/Km²) Land area(Km²) World Share
1 China 1,439,323,776 0.39% 153 9,388,211 18.47%
2 India 1,380,004,385 0.99% 464 2,973,190 17.70%
3 United States 331,002,651 0.59% 36 9,147,420 4.25%
4 Indonesia 273,523,615 1.07% 151 1,811,570 3.51%
5 Pakistan 220,892,340 2.00% 287 770,880 2.83%
6 Brazil 212,559,417 0.72% 25 8,358,140 2.73%
7 Nigeria 206,139,589 2.58% 226 910,770 2.64%
8 Bangladesh 164,689,383 1.01% 1,265 130,170 2.11%
9 Russia 145,934,462 0.04% 9 16,376,870 1.87%
10 Mexico 128,932,753 1.06% 66 1,943,950 1.65%
11 Japan 126,476,461 -0.30% 347 364,555 1.62%
12 Ethiopia 114,963,588 2.57% 115 1,000,000 1.47%
13 Philippines 109,581,078 1.35% 368 298,170 1.41%
14 Egypt 102,334,404 1.94% 103 995,450 1.31%
15 Vietnam 97,338,579 0.91% 314 310,070 1.25%
16 Democratic Republic of the Congo 89,561,403 3.19% 40 2,267,050 1.15%
17 Turkey 84,339,067 1.09% 110 769,630 1.08%
18 Iran 83,992,949 1.30% 52 1,628,550 1.08%
19 Germany 83,783,942 0.32% 240 348,560 1.07%
20 Thailand 69,799,978 0.25% 137 510,890 0.90%
21 United Kingdom 67,886,011 0.53% 281 241,930 0.87%
22 France 65,273,511 0.22% 119 547,557 0.84%
23 Italy 60,461,826 -0.15% 206 294,140 0.78%
24 Tanzania 59,734,218 2.98% 67 885,800 0.77%
25 South Africa 59,308,690 1.28% 49 1,213,090 0.76%
26 Myanmar 54,409,800 0.67% 83 653,290 0.70%
27 Kenya 53,771,296 2.28% 94 569,140 0.69%
28 South Korea 51,269,185 0.09% 527 97,230 0.66%
29 Colombia 50,882,891 1.08% 46 1,109,500 0.65%
30 Spain 46,754,778 0.04% 94 498,800 0.60%
31 Uganda 45,741,007 3.32% 229 199,810 0.59%
32 Argentina 45,195,774 0.93% 17 2,736,690 0.58%
33 Algeria 43,851,044 1.85% 18 2,381,740 0.56%
34 Sudan 43,849,260 2.42% 25 1,765,048 0.56%
35 Ukraine 43,733,762 -0.59% 75 579,320 0.56%
36 Iraq 40,222,493 2.32% 93 434,320 0.52%
37 Afghanistan 38,928,346 2.33% 60 652,860 0.50%
38 Poland 37,846,611 -0.11% 124 306,230 0.49%
39 Canada 37,742,154 0.89% 4 9,093,510 0.48%
40 Morocco 36,910,560 1.20% 83 446,300 0.47%
41 Saudi Arabia 34,813,871 1.59% 16 2,149,690 0.45%
42 Uzbekistan 33,469,203 1.48% 79 425,400 0.43%
43 Peru 32,971,854 1.42% 26 1,280,000 0.42%
44 Angola 32,866,272 3.27% 26 1,246,700 0.42%
45 Malaysia 32,365,999 1.30% 99 328,550 0.42%
46 Mozambique 31,255,435 2.93% 40 786,380 0.40%
47 Ghana 31,072,940 2.15% 137 227,540 0.40%
48 Yemen 29,825,964 2.28% 56 527,970 0.38%
49 Nepal 29,136,808 1.85% 203 143,350 0.37%
50 Venezuela 28,435,940 -0.28% 32 882,050 0.36%
51 Madagascar 27,691,018 2.68% 48 581,795 0.36%
52 Cameroon 26,545,863 2.59% 56 472,710 0.34%
53 Côte D’Ivoire 26,378,274 2.57% 83 318,000 0.34%
54 North Korea 25,778,816 0.44% 214 120,410 0.33%
55 Australia 25,499,884 1.18% 3 7,682,300 0.33%
56 Niger 24,206,644 3.84% 19 1,266,700 0.31%
57 Taiwan 23,816,775 0.18% 673 35,410 0.31%
58 Sri Lanka 21,413,249 0.42% 341 62,710 0.27%
59 Burkina Faso 20,903,273 2.86% 76 273,600 0.27%
60 Mali 20,250,833 3.02% 17 1,220,190 0.26%
61 Romania 19,237,691 -0.66% 84 230,170 0.25%
62 Malawi 19,129,952 2.69% 203 94,280 0.25%
63 Chile 19,116,201 0.87% 26 743,532 0.25%
64 Kazakhstan 18,776,707 1.21% 7 2,699,700 0.24%
65 Zambia 18,383,955 2.93% 25 743,390 0.24%
66 Guatemala 17,915,568 1.90% 167 107,160 0.23%
67 Ecuador 17,643,054 1.55% 71 248,360 0.23%
68 Syria 17,500,658 2.52% 95 183,630 0.22%
69 Netherlands 17,134,872 0.22% 508 33,720 0.22%
70 Senegal 16,743,927 2.75% 87 192,530 0.21%
71 Cambodia 16,718,965 1.41% 95 176,520 0.21%
72 Chad 16,425,864 3.00% 13 1,259,200 0.21%
73 Somalia 15,893,222 2.92% 25 627,340 0.20%
74 Zimbabwe 14,862,924 1.48% 38 386,850 0.19%
75 Guinea 13,132,795 2.83% 53 245,720 0.17%
76 Rwanda 12,952,218 2.58% 525 24,670 0.17%
77 Benin 12,123,200 2.73% 108 112,760 0.16%
78 Burundi 11,890,784 3.12% 463 25,680 0.15%
79 Tunisia 11,818,619 1.06% 76 155,360 0.15%
80 Bolivia 11,673,021 1.39% 11 1,083,300 0.15%
81 Belgium 11,589,623 0.44% 383 30,280 0.15%
82 Haiti 11,402,528 1.24% 414 27,560 0.15%
83 Cuba 11,326,616 -0.06% 106 106,440 0.15%
84 South Sudan 11,193,725 1.19% 18 610,952 0.14%
85 Dominican Republic 10,847,910 1.01% 225 48,320 0.14%
86 Czechia 10,708,981 0.18% 139 77,240 0.14%
87 Greece 10,423,054 -0.48% 81 128,900 0.13%
88 Jordan 10,203,134 1.00% 115 88,780 0.13%
89 Portugal 10,196,709 -0.29% 111 91,590 0.13%
90 Azerbaijan 10,139,177 0.91% 123 82,658 0.13%
91 Sweden 10,099,265 0.63% 25 410,340 0.13%
92 Honduras 9,904,607 1.63% 89 111,890 0.13%
93 United Arab Emirates 9,890,402 1.23% 118 83,600 0.13%
94 Hungary 9,660,351 -0.25% 107 90,530 0.12%
95 Tajikistan 9,537,645 2.32% 68 139,960 0.12%
96 Belarus 9,449,323 -0.03% 47 202,910 0.12%
97 Austria 9,006,398 0.57% 109 82,409 0.12%
98 Papua New Guinea 8,947,024 1.95% 20 452,860 0.11%
99 Serbia 8,737,371 -0.40% 100 87,460 0.11%
100 Israel 8,655,535 1.60% 400 21,640 0.11%
101 Switzerland 8,654,622 0.74% 219 39,516 0.11%
102 Togo 8,278,724 2.43% 152 54,390 0.11%
103 Sierra Leone 7,976,983 2.10% 111 72,180 0.10%
104 Hong Kong 7,496,981 0.82% 7,140 1,050 0.10%
105 Laos 7,275,560 1.48% 32 230,800 0.09%
106 Paraguay 7,132,538 1.25% 18 397,300 0.09%
107 Bulgaria 6,948,445 -0.74% 64 108,560 0.09%
108 Libya 6,871,292 1.38% 4 1,759,540 0.09%
109 Lebanon 6,825,445 -0.44% 667 10,230 0.09%
110 Nicaragua 6,624,554 1.21% 55 120,340 0.08%
111 Kyrgyzstan 6,524,195 1.69% 34 191,800 0.08%
112 El Salvador 6,486,205 0.51% 313 20,720 0.08%
113 Turkmenistan 6,031,200 1.50% 13 469,930 0.08%
114 Singapore 5,850,342 0.79% 8,358 700 0.08%
115 Denmark 5,792,202 0.35% 137 42,430 0.07%
116 Finland 5,540,720 0.15% 18 303,890 0.07%
117 Congo 5,518,087 2.56% 16 341,500 0.07%
118 Slovakia 5,459,642 0.05% 114 48,088 0.07%
119 Norway 5,421,241 0.79% 15 365,268 0.07%
120 Oman 5,106,626 2.65% 16 309,500 0.07%
121 State of Palestine 5,101,414 2.41% 847 6,020 0.07%
122 Costa Rica 5,094,118 0.92% 100 51,060 0.07%
123 Liberia 5,057,681 2.44% 53 96,320 0.06%
124 Ireland 4,937,786 1.13% 72 68,890 0.06%
125 Central African Republic 4,829,767 1.78% 8 622,980 0.06%
126 New Zealand 4,822,233 0.82% 18 263,310 0.06%
127 Mauritania 4,649,658 2.74% 5 1,030,700 0.06%
128 Panama 4,314,767 1.61% 58 74,340 0.06%
129 Kuwait 4,270,571 1.51% 240 17,820 0.05%
130 Croatia 4,105,267 -0.61% 73 55,960 0.05%
131 Moldova 4,033,963 -0.23% 123 32,850 0.05%
132 Georgia 3,989,167 -0.19% 57 69,490 0.05%
133 Eritrea 3,546,421 1.41% 35 101,000 0.05%
134 Uruguay 3,473,730 0.35% 20 175,020 0.04%
135 Bosnia and Herzegovina 3,280,819 -0.61% 64 51,000 0.04%
136 Mongolia 3,278,290 1.65% 2 1,553,560 0.04%
137 Armenia 2,963,243 0.19% 104 28,470 0.04%
138 Jamaica 2,961,167 0.44% 273 10,830 0.04%
139 Qatar 2,881,053 1.73% 248 11,610 0.04%
140 Albania 2,877,797 -0.11% 105 27,400 0.04%
141 Puerto Rico 2,860,853 -2.47% 323 8,870 0.04%
142 Lithuania 2,722,289 -1.35% 43 62,674 0.03%
143 Namibia 2,540,905 1.86% 3 823,290 0.03%
144 Gambia 2,416,668 0.00% 239 10,120 0.03%
145 Botswana 2,351,627 2.08% 4 566,730 0.03%
146 Gabon 2,225,734 2.45% 9 257,670 0.03%
147 Lesotho 2,142,249 0.80% 71 30,360 0.03%
148 North Macedonia 2,083,374 0.00% 83 25,220 0.03%
149 Slovenia 2,078,938 0.01% 103 20,140 0.03%
150 Guinea-Bissau 1,968,001 2.45% 70 28,120 0.03%
151 Latvia 1,886,198 -1.08% 30 62,200 0.02%
152 Bahrain 1,701,575 3.68% 2,239 760 0.02%
153 Equatorial Guinea 1,402,985 3.47% 50 28,050 0.02%
154 Trinidad and Tobago 1,399,488 0.32% 273 5,130 0.02%
155 Estonia 1,326,535 0.07% 31 42,390 0.02%
156 Timor Leste 1,318,445 1.96% 89 14,870 0.02%
157 Mauritius 1,271,768 0.17% 626 2,030 0.02%
158 Cyprus 1,207,359 0.73% 131 9,240 0.02%
159 Eswatini 1,160,164 1.05% 67 17,200 0.01%
160 Djibouti 988,000 1.48% 43 23,180 0.01%
161 Fiji 896,445 0.73% 49 18,270 0.01%
162 Reunion 895,312 0.72% 358 2,500 0.01%
163 Comoros 869,601 2.20% 467 1,861 0.01%
164 Guyana 786,552 0.48% 4 196,850 0.01%
165 Bhutan 771,608 1.12% 20 38,117 0.01%
166 Solomon Islands 686,884 2.55% 25 27,990 0.01%
167 Macao 649,335 1.39% 21,645 30 0.01%
168 Montenegro 628,066 0.01% 47 13,450 0.01%
169 Luxembourg 625,978 1.66% 242 2,590 0.01%
170 Western Sahara 597,339 2.55% 2 266,000 0.01%
171 Suriname 586,632 0.90% 4 156,000 0.01%
172 Cabo Verde 555,987 1.10% 138 4,030 0.01%
173 Maldives 540,544 1.81% 1,802 300 0.01%
174 Malta 441,543 0.27% 1,380 320 0.01%
175 Brunei 437,479 0.97% 83 5,270 0.01%
176 Guadeloupe 400,124 0.02% 237 1,690 0.01%
177 Belize 397,628 1.86% 17 22,810 0.01%
178 Bahamas 393,244 0.59% 39 10,010 0.01%
179 Martinique 375,265 -0.08% 354 1,060 0.00%
180 Iceland 341,243 0.65% 3 100,250 0.00%
181 Vanuatu 307,145 2.42% 25 12,190 0.00%
182 French Guiana 298,682 2.70% 4 82,200 0.00%
183 Barbados 287,375 0.12% 668 430 0.00%
184 New Caledonia 285,498 0.97% 16 18,280 0.00%
185 French Polynesia 280,908 0.58% 77 3,660 0.00%
186 Mayotte 272,815 2.50% 728 375 0.00%
187 Sao Tome and Principe 219,159 1.91% 228 960 0.00%
188 Samoa 198,414 0.67% 70 2,830 0.00%
189 Saint Lucia 183,627 0.46% 301 610 0.00%
190 Channel Islands 173,863 0.93% 915 190 0.00%
191 Guam 168,775 0.89% 313 540 0.00%
192 Curaçao 164,093 0.41% 370 444 0.00%
193 Kiribati 119,449 1.57% 147 810 0.00%
194 Federated States of Micronesia 115,023 0.00% 164 700 0.00%
195 Grenada 112,523 0.46% 331 340 0.00%
196 Saint Vincent and the Grenadines 110,940 0.32% 284 390 0.00%
197 Aruba 106,766 0.43% 593 180 0.00%
198 Tonga 105,695 1.15% 147 720 0.00%
199 United States Virgin Islands 103,000 0.59% 294 350 0.00%
200 Seychelles 98,347 0.62% 214 460 0.00%
201 Antigua and Barbuda 97,929 0.84% 223 440 0.00%
202 Isle of Man 85,033 0.53% 149 570 0.00%
203 Andorra 77,265 0.16% 164 470 0.00%
204 Dominica 71,986 0.25% 96 750 0.00%
205 Cayman Islands 65,722 1.19% 274 240 0.00%
206 Bermuda 62,278 -0.36% 1,246 50 0.00%
207 Marshall Islands 59,190 0.68% 329 180 0.00%
208 Northern Mariana Islands 57,559 0.00% 125 460 0.00%
209 Greenland 56,770 0.17% 0 410,450 0.00%
210 American Samoa 55,191 -0.22% 276 200 0.00%
211 Saint Kitts and Nevis 53,199 0.71% 205 260 0.00%
212 Faroe Islands 48,863 0.38% 35 1,396 0.00%
213 Sint Maarten 42,876 1.15% 1,261 34 0.00%
214 Monaco 39,242 0.71% 39,242 1 0.00%
215 Turks and Caicos Islands 38,717 1.38% 41 950 0.00%
216 Saint Martin 38,666 1.75% 730 53 0.00%
217 Liechtenstein 38,128 0.29% 238 160 0.00%
218 San Marino 33,931 0.21% 566 60 0.00%
219 Gibraltar 33,691 -0.03% 3,369 10 0.00%
220 British Virgin Islands 30,231 0.67% 202 150 0.00%
221 Caribbean Netherlands 26,223 0.94% 80 328 0.00%
222 Palau 18,094 0.48% 39 460 0.00%
223 Cook Islands 17,564 0.09% 73 240 0.00%
224 Anguilla 15,003 0.90% 167 90 0.00%
225 Tuvalu 11,792 1.25% 393 30 0.00%
226 Wallis and Futuna Islands 11,239 -1.69% 80 140 0.00%
227 Nauru 10,824 0.63% 541 20 0.00%
228 Saint Barthelemy 9,877 0.30% 470 21 0.00%
229 Saint Helena 6,077 0.30% 16 390 0.00%
230 Saint Pierre and Miquelon 5,794 -0.48% 25 230 0.00%
231 Montserrat 4,992 0.06% 50 100 0.00%
232 Falkland Islands 3,480 3.05% 0 12,170 0.00%
233 Niue 1,626 0.68% 6 260 0.00%
234 Tokelau 1,357 1.27% 136 10 0.00%
235 Holy See 801 0.25% 2,003 0 0.00%
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How many people have ever lived on Earth?

It was written during the 1970s that 75% of the people that had ever been born were alive at that moment. This was minutely false.

 Assuming that we start counting from about 50,000 B.C., the time when modern Homo appeared on the Earth (and not from 700,000 B.C. when the ancestors of Homo sapiens arose, or several million years ago when hominids were present), taking under consideration that all population data are a rough estimate, and assuming a constant rate of growth applied to each period up to modern times, it has been estimated that a complete of approximately 106 billion people have been born since the dawn of the human species, making the population currently alive roughly 6% of all people who have ever lived on planet Earth.

 Others have estimated the number of human beings who have ever lived to be anywhere from 45 billion to 125 billion, with most estimates falling into the span of 90 to 110 billion humans.

World Population clock: sources and methodology

The world population counter displayed on Worldstatistics considers data from two primary sources: the United Nations and the U.S. Census Bureau.

The United Nations Population Division of the Department of Economic and Social Affairs every two years calculates, updates, and proclaims estimates of the total population in its World Population Prospects series. These population estimates and projections provide the quality and consistent set of population figures used throughout the United Nations system.

The World Population Prospect: the 2019 Revision provides the foremost recent data (released in June of 2019). Estimates and projected world population and country-specific populations are given from 1950 to 2100 and are published every two years. Worldstatistics, as it is ordinary practice, utilizes the medium fertility estimates.

Data underlying the population estimates are national and sub-national census data on births, deaths, and migrants available from federal sources and publications and questionnaires. For all countries, census and registration data are assessed and, if necessary, modified for incompleteness by the Population Division as a part of its preparations of the official United Nations population estimates and projections.

The International Programs Center at the U.S. Census Bureau, Population Division also develops estimates and projections supported the analysis of accessible data (based on census, survey, and administrative information) on population, fertility, mortality, and migration for every country or area of the world. According to the U.S. Census Bureau, the world population achieved 7 billion on March 12, 2012.

For most countries, the data's adjustment is necessary to correct errors, omissions, and inconsistencies in the data. Finally, since the foremost recent data for a single country is commonly a minimum of two years old, the current world population figure is necessarily a projection of past data based on assumed trends. As new data become available, hypotheses and data are reevaluated, and past conclusions and current figures could also be modified.

For information about how the U.S. Census Bureau makes these estimates and projections, see the Population Estimates and Projections Methodology.

Why Worldstatistics clocks are the most accurate

The above world population clock relies on the newest estimates released in June of 2019 by the United Nations. It will show the same number wherever you are in the world and whatever time you set on your P.C. Worldstatistics is the only website to show live counters based on U.N. data and that do not follow the user's P.C. clock.

Visitors around the world visiting a P.C. clock based counter see different numbers depending on where they are located, and in the past have seen other world population clocks - such as the one hosted on a United Nations website and on National Geographic - achieving 7 billion whenever their locally set P.C. clocks came 4:21:10 AM on October 31, 2011.

The U.N. data is based on estimates and can't be 100% accurate. In all honesty, nobody can say with any degree of certainty on which day the world population reached 7 billion (or any other exact number), let alone at what time. But once an estimate is made (based on the best data and analysis available), the world population clock should be showing the same number at any given time anywhere around the world.