Carbon-14 Dating
Initial Amount: 100 grams; Half-Life: 5,730 years; Time Elapsed: 5,730 years
Remaining Amount: 50 grams
Half-Life Calculator
Chemistry0.0(0)
Calculates the remaining amount of a substance after a certain period, given its initial amount and half-life.
More tools:Science & Lab Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Initial Amount, Half-Life, and Time Elapsed in the units shown.
Step 2
Read Remaining Amount in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Short-Lived Isotope
Initial Amount: 50 grams; Half-Life: 1 years; Time Elapsed: 3 years
Remaining Amount: 6.25 grams
Medical Isotope
Initial Amount: 200 grams; Half-Life: 6 years; Time Elapsed: 24 years
Remaining Amount: 12.5 grams
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