⌕⌘ K
t½
MATH
Half-Life Calculator
Solve Half-Life with a transparent method.
What should be solved?Solve decay variables or convert among half-life, mean lifetime, and the decay constant.
10 optionsREMAINING AMOUNT12.5
Remaining amount: Solves A = A₀ × (1/2)^(t/t½) and converts t½ = τ ln(2) = ln(2)/λ.
- Initial amount
- 100
- Remaining amount
- 12.5
- Elapsed time
- 12
- Half-life
- 4
- Mean lifetime (τ)
- 5.77078016
- Decay constant (λ)
- 0.1732868
Formula checkedSolves A = A₀ × (1/2)^(t/t½) and converts t½ = τ ln(2) = ln(2)/λ.