1in8B official English website

1in8B - A life, one in 8 billion

On the one in 8 billion website, explore birth odds and baseline data for 172 countries, then read a simulated life against that background. Compare birth and population weights.

Each life is a life lived inside real statistics.
0Estimated worldwide births since you opened this page
0Estimated worldwide deaths in that time
  1. Be born somewhere in the world.
  2. Choose what matters as the years pass.
  3. Keep the moments that make this life yours.
Length of one life

If you were born right now

Based on annual births, a birth in the first country (India) is about 175 times as likely as a birth in the second (Taiwan).

India17.6%
China6.7%
Nigeria5.7%
Pakistan5.2%
Indonesia3.4%
DR Congo3.3%
Ethiopia3.1%
United States2.8%
Bangladesh2.6%
Brazil2.0%

Includes child death, poverty, illness, war and loss. This fictional simulation combines a statistical background with game rules; it does not reproduce real-world event rates one for one. Recommended for ages 15 and up.

In the one in 8 billion game, where would your life begin?

What is 1in8B?

1in8B, or “one in 8 billion”, follows the idea of one life among eight billion. This edition combines birth probabilities and reference data for 172 countries with a free browser life simulator. Explore country backgrounds, then follow a character’s story and make choices at events. No download or account is needed.

in8b.com is the 1in8B official English website for this birth-odds and country-data edition.

On the one in 8 billion website, explore birth odds and baseline data for 172 countries, then read a simulated life against that background. Compare birth and population weights.

In the 1 in 8 billion game, read one life year by year, then decide how to respond at its turning points. The idea of one in 8 billion starts with a birthplace you do not choose; the events, choices and moments you keep make this character’s story.

Country data explorer

Start with United States: a closer look, compare living conditions and opportunities in Canada and Mexico, or browse all country baselines. Population, births, health, and education are explained alongside the data's limitations.

Read the odds of drawing a birthplace

A country's starting chance is its annual births or population, according to this life's draw mode, divided by the corresponding total in the game's dataset. The birth certificate expresses that share as an approximate one-in-N figure. It is a chance of drawing that birthplace within the model, not the chance of reproducing every detail of that particular child. Starting another life draws again; it does not guarantee a new country.

Follow four states alongside the events

Health, Joy, Mind and Bonds describe the character's changing game state. Read the effect hints under each focus before choosing: studying, time with friends and work can involve different trade-offs. Compare the next events with those changes, and open the profile for country data. Higher scores do not guarantee a particular ending, and country averages remain context rather than an individual forecast.

How birth probabilities work

The game uses a dataset of 172 countries. By default, each country's annual births supply its weight; before a new life, you can instead choose population weights from the same dataset. Both modes begin at age 0, and countries do not have equal 1-in-172 chances. These are the game's model probabilities, not your own probability of being born there.

Play a year, or let life unfold

Start a new life, read the birth certificate and choose a focus as the years pass. Make event choices yourself, or turn on automatic choices. Change the speed, pause to read the timeline and star moments you want to keep. The profile shows the character's circumstances; the final summary looks back over that life.

Statistics set the background

Country indicators help shape the simulation, while random events and decisions create the story. A national average does not describe every person. The character, lifespan and cause of death are game outcomes, not a prediction of your health, future income or life expectancy.

Data sources and limits

The data notes cite UN World Population Prospects 2024 and World Bank World Development Indicators (WDI). Complete reference years and original values are not documented for every indicator, so we cannot guarantee that all figures are current or match the databases’ present values. The links below explain the indicators and original statistics; they do not verify every game value.

Source databases

The existing baseline draws on UN World Population Prospects 2024 and World Bank development indicators, among other public statistics. It combines different reference years; individual observation years and estimation flags were not retained. Consult the original series before using these figures for research or current decisions.

Questions before you begin

What does one in eight billion mean in 1in8B?

The name evokes one person among eight billion. It is a storytelling scale, not a live population count or a one-in-eight-billion chance of drawing each country. Birthplace odds use annual births or population weights from the 172-country dataset.

Can I choose the country where I am born?

No. You can choose weights based on annual births (the default) or population, but you cannot specify a country. A new life draws again and may begin in the same country.

Where can I find the 1 in 8 billion website? Do I need to download the game or sign up?

You can play here on the official 1in8B website. Return to the game area at the top of the page to start a life. It is free in your browser, with no app download or account required.

Where is my progress saved?

Progress in an unfinished life is saved in this browser on this website when local storage is available. It does not sync across browsers, devices or domains; clearing site data can remove it. You can separately choose to keep the record of a completed life in the cloud. This does not let you continue an unfinished life on another device.

Can I change the language during a life?

Yes. There are 24 language options. Switching languages also translates the life history and cause of death without starting the life again.

Prefer a game-like visual style? Try the interactive edition.

Website analytics and privacy

We use Google Analytics 4 (GA4) to measure page views, general traffic sources and basic actions such as starting, resuming or completing a life and opening, preparing or sharing a result card. Action data is limited to general categories: sharing method and outcome, interface language and site edition. Shared links may include fixed source labels (platform, copied link or QR code) to count visits and subsequent game starts; these labels contain no character or player identifier. GA4 may use analytics cookies and process device, browser and approximate location information. Analytics URLs exclude query strings and fragments. We do not send private journals, character names or details, story or ending content, or saved games to GA4. Progress in an unfinished life is saved in this browser for this website and does not sync across browsers, devices or domains. For GA4, this site does not enable Google signals, advertising personalization or cross-domain user identification. You can turn website analytics on or off here.

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