AllEasyToolsMathematics
Half-life and decay
Half-life and decay: calculate from your inputs and inspect the formula. No account required. Processing stays in your browser.
N(t)=N₀·2^(−t/T)
Check units and the formula domain. Numerical results are rounded.
How to use this calculator
- Identify the quantities and convert them to the units shown.
- Apply the formula first, then compare with the substitution and result.
- Check the assumptions and whether the order of magnitude makes sense.
Levels are approximate topic groupings, not a complete curriculum for every country. Numerical results are rounded and may lose precision for extreme or nearly singular inputs.
A practical example
Use these sample inputs to check the calculation before entering your own values.
- Initial amount
- 100
- Elapsed time
- 20
- Half-life in the same unit
- 10
Result for this example
- Remaining amount
- 25