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Half-Life and Radioactive Decay Calculator

Determine how much of a radioactive substance remains after any period of time, or back-calculate the half-life from measured decay data. Ideal for radiometric dating, nuclear physics coursework, and radiation safety assessments.

Initial Amount (N₀) (atoms)

Half-Life (years)

Time Elapsed (years)

Decay Type

Fill in the required fields to see your result.

Chemistry

Moles to Grams Calculator

Convert any amount in moles to grams using the substance's molecular weight. Ideal for chemistry students and lab technicians preparing solutions or scaling reactions.

Number of moles (mol)

Molecular weight (g/mol)

Fill in the required fields to see your result.

Key differences

	Half-Life and Radioactive Decay Calculator	Moles to Grams Calculator
Category	Chemistry	Chemistry
Inputs required	4	2
Result	Remaining Amount (atoms)	Mass (g)
What it does	Determine how much of a radioactive substance remains after any period of time, or back-calculate the half-life from measured decay data. Ideal for radiometric dating, nuclear physics coursework, and radiation safety assessments.	Convert any amount in moles to grams using the substance's molecular weight. Ideal for chemistry students and lab technicians preparing solutions or scaling reactions.