Algebra & Equations
Half-Life Remaining
Amount remaining after time using half-life.
Formula
Formula
N = N0 · (12)tT
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| N₀ | initial amount | computed result | — | result |
| t | elapsed time | real number (ℝ) | — | input |
| T | half-life | real number (ℝ) | — | input |
Try it yourself
Interactive calculator
Worked examples
Example 1
GivenN₀ = 100, time t = 30, half-life T = 10
Result12.5
Example 2
GivenN₀ = 80, time t = 5, half-life T = 5
Result40