Half-Life Calculator
Calculate radioactive decay, remaining quantity, and decay constant from half-life.
Embed this toolRemaining
25.0000
Decayed
75.0000
% Remaining
25.00%
Decay Constant
1.2097e-4
Half-Lives Passed
2.000
Advertisement
Ad
Understanding Radioactive Decay
Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. The half-life is the time it takes for half of a radioactive sample to decay.
The Decay Formula
N(t) = N₀ × (½)^(t / t½)
Where N(t) is the remaining quantity, N₀ is the initial amount, t is elapsed time, and t½ is the half-life.
Frequently Asked Questions
Half-life is the time required for half of the radioactive atoms in a sample to decay. It is a constant for each isotope and ranges from fractions of a second to billions of years.
Related Tools
Concrete Calculator
Calculate concrete volume for slabs, footings, and columns. Estimates bags needed and total cost.
Kinetic Energy Calculator
Calculate kinetic energy using mass and velocity with unit conversion support.
Force Calculator
Calculate force using Newton's second law: F = ma. Supports multiple units.
Wavelength Calculator
Calculate wavelength from frequency and wave speed. Supports light and sound waves.