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Life Clock

Enter your birthday and life expectancy to see how much of your life has passed — a memento-mori clock.

  • Free
  • No signup
  • Works offline
  • Instant

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Age Calculator Age Find your exact age in years, months, days — and total days and hours lived. Online Clock Clock The current time and date — a reminder that the clock is always ticking.

lifetime-clock.com puts time in perspective. The life clock shows how much of your life has passed and how much may remain; the age calculator gives your exact age; and there's a plain online clock too. Everything runs privately in your browser — nothing is uploaded.

Memento mori, gently

Seeing life as a filling bar — or a grid of ~4,000 weeks — is a surprisingly motivating way to value the present. Our guides cover the 'life in weeks' idea, life-expectancy figures, and using time perspective to focus on what matters.

From our guides

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Life in weeks The Four Thousand Weeks Idea Explained, and Why It Frees You The four thousand weeks idea explained, showing why framing a human life as roughly 4,000 weeks, as Oliver Burkeman does, is liberating rather than grim and how to use it. 6 min read Life expectancy explained How Life Expectancy Is Calculated: A Plain-English Guide A plain-English explanation of how life expectancy is calculated, covering life tables, why the figure is an average, and why it is a planning estimate rather than a personal forecast. 6 min read Age & date calculations How Many Days Old Am I? Counting Your Life in Days Learn to answer how many days old am I, why the total is larger than you expect, the leap-year catch that trips people up, and how to find it fast. 5 min read Age & date calculations How to Calculate Your Exact Age in Years, Months, and Days A clear guide to calculating your exact age in years, months, and days, including the leap-year and uneven-month rules that trip people up, plus a faster way. 5 min read Making time count Making the Most of Your Remaining Time: A Practical Guide Gentle, practical ways to make the most of your remaining time, using a sense of finite time to focus on the people, work, and habits that genuinely matter to you. 6 min read Life expectancy explained Period vs Cohort Life Expectancy: What the Difference Means A simple explanation of period vs cohort life expectancy, two ways of measuring average lifespan, why they differ, and why both are planning estimates rather than personal forecasts. 5 min read Making time count Using Time Perspective to Prioritise What Truly Matters How using time perspective, zooming out on your lifespan, helps you decide what deserves your attention, with practical, low-pressure ways to apply it to everyday choices. 5 min read Memento mori & time What Is a Life Clock and How Does It Help You See Time? A friendly explanation of what a life clock is, how it visualises the time you have lived and have left, why it helps focus, and how to use it responsibly. 5 min read

Frequently asked questions

Is lifetime-clock.com free?
Yes — free, no signup, no download.
Is my personal data kept?
No — all calculations run locally in your browser; your birthday is never uploaded or stored.
Is this a health or medical tool?
No — the life clock is a perspective tool using a life-expectancy estimate you choose, not a medical prediction.