What is the Radioactive Decay Calculator?

The Radioactive Decay Calculator helps you determine the remaining amount of a radioactive substance over time using the exponential decay law N = N₀·e⁻ᶫᵗ. By entering the initial amount, decay constant, and elapsed time, the calculator instantly computes how much of the substance remains and the percentage of the original sample. This tool is useful for students, teachers, and researchers studying nuclear physics, chemistry, or any application involving radioactive decay, providing accurate results with clear step-by-step outputs.

How to Use:

1. Enter Initial Amount (N₀ or A₀): Type the starting quantity of the radioactive substance.
2. Enter Decay Constant (λ): Provide the decay constant in 1/s.
3. Enter Time (t): Type the time elapsed in seconds.
4. Click “Calculate”: The calculator applies the radioactive decay formula to find the remaining amount.
5. Review the Result: The output shows the remaining quantity, fraction remaining in percentage, and a step-by-step table of the calculation.