Lifetime Working Hours Calculator

How it works

Lifetime hours = (retirement age − starting age) × hours per week × weeks per year · nonstop years = hours ÷ 8,766 · share of waking life = hours ÷ (life expectancy × 365.24 × (24 − sleep hours))

The often-quoted “90,000 hours at work” comes from roughly 40 hours a week, 50 weeks a year for 45 years. Actual hours vary a lot: the OECD average was about 1,750 hours per worker per year in 2023, from under 1,400 in Germany to over 2,200 in Mexico and Colombia. Seen against waking hours rather than all hours, work takes a much larger share of adult life, which is why job fit matters so much.

Worked example

From age 22 to 65 (43 years) at 40 hours a week and 48 weeks a year: 43 × 40 × 48 = 82,560 hours — 9.42 years of nonstop time or 3,440 full days. With an 80-year life and 8 hours of sleep, that is 11.77% of your whole life and 17.66% of your waking life.

Sources: OECD — Hours worked (indicator) · US BLS — American Time Use Survey

Frequently asked questions