// multi-utility computation suite · offline · instant · precise
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sci.radioactive-dating Calculator
Calculates the age of a sample from the ratio of parent to daughter isotopes using the radioactive decay equation. Uranium-lead dating (t½ of ²³⁸U = 4.47 Gyr) dates rocks up to the age of the solar system — potassium-argon dates volcanic rocks from 100,000 years to billions of years.
Inputs
Ratio
Reference formula or conversion factor shown for context.
Half Life Yr
Reference formula or conversion factor shown for context.
Parent Atoms
Reference formula or conversion factor shown for context.
Results
age (years)
Reference formula or conversion factor shown for context.
original atoms N0
The value at the specified point or condition.
daughter atoms
The value at the specified point or condition.
N/N0 ratio
The proportional relationship between two quantities.
age = -t½ × log2(N/N0)
Sample size or count used in the calculation.
C-14 half-life
Time for half the radioactive material to decay. After 10 half-lives, less than 0.1% of the original material remains.