The first time you see the pace options — About 30 minutes, About 1 hour, About 1.5 hours — they look like difficulty settings. They are not. They are the real time it takes to reach the country’s life expectancy. The age at death is a separate draw.
This note is the arithmetic behind the choice, and a few practical ways to plan a session.
The rule
If the pace is P minutes and the country’s life expectancy is L years:
- Seconds per game year at 1× =
(P × 60) ÷ L - Seconds per game year at speed s = that number divided by
s - Game years per real minute at 1× =
60 ÷ seconds per year - Real minutes to reach life expectancy =
P ÷ s
The last one is the useful one for planning. At 16×, a 60-minute pace takes about 3.75 minutes to reach life expectancy. At 30 minutes, it takes about 1.9 minutes. At 1.5 hours, about 5.6 minutes.
A worked example
Take a country with a life expectancy of 72 years. That is close to the birth-weighted average in the game’s 172-country table (70.2 years, our calculation).
| Pace | At 1× | At 4× | At 16× | Session at 16× |
|---|---|---|---|---|
| 30 min | 25.0 s/year | 6.3 s/year | 1.6 s/year | 1.9 min |
| 60 min | 50.0 s/year | 12.5 s/year | 3.1 s/year | 3.8 min |
| 90 min | 75.0 s/year | 18.8 s/year | 4.7 s/year | 5.6 min |
The official page says one hour gives about 40–60 seconds per game year. That range corresponds to life expectancies of about 60–90 years: 60 × 60 ÷ 60 = 60 seconds per year, and 60 × 60 ÷ 90 = 40 seconds per year.
A country with a shorter life expectancy has a longer game year at the same pace, because the same real hour is spread over fewer years. A country with a longer life expectancy has a shorter game year.
Why 16× changes more than the pace
The pace and the speed are different controls:
- Pace sets the real-time target to life expectancy.
- Speed changes how fast you move through that target.
A 60-minute pace at 1× is a one-hour session if the character reaches life expectancy. A 60-minute pace at 16× is about 3.75 minutes. The draw, the events and the decisions are the same; only the clock changes.
The speed control is useful for the quiet years. Most players do not need to read every year of a childhood. Run at 8× or 16×, then drop to 1× or pause when a decision arrives.
What the estimate leaves out
The P ÷ s formula is a lower bound. It assumes:
- the character reaches the country’s life expectancy,
- the player never pauses,
- no decision takes real time,
- no money sheet or family panel is opened.
In practice, a session is longer. The five reflective pauses, the money sheet, the family decisions and the reading all add minutes. A 3.75-minute run at 16× can easily become 10–15 minutes if you read everything.
Choosing a pace
30 minutes
Good for:
- a first look at the game,
- a classroom lesson,
- a short demo,
- a run where you want to see many lives.
At 30 minutes, a game year is about 20–30 seconds at 1×, depending on life expectancy. The life moves quickly. Use 4× or 8× and pause at decisions.
1 hour
The default, and the best first run for most players. A game year is about 40–60 seconds at 1×. There is enough time to read a decision without the life running away.
1.5 hours
Good for:
- a slow, immersive evening run,
- a life you want to remember,
- a player who reads every event.
At 1.5 hours, a game year is about 60–90 seconds at 1×. The life is slower, not deeper: the events and decisions are the same. The pace changes how much real time you spend with them.
Session planning
If you have 20 minutes and want a complete life:
- Choose 30 minutes pace.
- Use 8× for the early years.
- Drop to 1× or pause at each decision.
- Skip the money sheet until the character is working.
- Accept that you may not reach the country’s life expectancy; the death draw can end earlier.
If you have an hour and want the full experience:
- Choose 1 hour pace.
- Use 4× for ordinary years.
- Pause at every decision and read the birth card.
- Open Spend & invest once a decade.
- Read the death record.
If you want to see many lives:
- Choose 30 minutes pace, 16×.
- Leave Auto mode on if you are watching, or off if you want to choose quickly.
- Do not read every year; read the record after the death.
The one number to remember
The pace is the time to reach life expectancy, not the age at death. A 60-minute pace does not mean the character dies at 60 minutes. It means 60 minutes is the time to the country’s average. The actual life can be shorter or longer.
The pace calculator does the arithmetic for any country. The settings guide explains how the pace fits with the world and the draw.
The pace options and the “40–60 seconds per game year” figure are from the game’s About page and home screen, checked 27 October 2026. Life expectancy values are from the 172-country table. The formula and the worked table are our calculations.
Questions about this note
How long is one life in 1 in 8 Billion?
You choose about 30 minutes, about 1 hour (the default) or about 1.5 hours to reach the country’s life expectancy. The actual death can happen earlier or later, so the session length is an estimate, not a timer.
How fast is a game year?
At the one-hour pace, a game year takes about 40–60 seconds at 1×. The range corresponds to life expectancies of about 60–90 years. At 16×, that becomes roughly 2.5–4 seconds.
Can I finish a life in a few minutes?
Yes. Choose the 30-minute pace and 16× speed. A life that reaches life expectancy takes about 30 minutes divided by 16, or under two minutes of real time, before pauses and decisions.