Half-Life Calculator - Free, Instant, In Your Browser
Enter the initial amount, the half-life, and the elapsed time to calculate the remaining amount.
How to use Half Life Calculator
- 1Enter the required date(s) and details above.
- 2Click Calculate - Half Life Calculator runs instantly, right in your browser.
- 3Read your result below.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
What's the formula?
N = N₀ x 0.5^(t / half-life), where N₀ is the initial amount and t is the elapsed time.
Is my data sent to a server?
No - everything runs entirely in your browser with JavaScript. Nothing is uploaded.