Years to decay constant per second
Type a value in yr to get it in λ (1/s) instantly.
3.833×10⁻¹²λ (1/s)
That's about the same as carbon-14. Only one percent would be left after about 38,070 years.
Convert the other way: λ (1/s) to yr
What it means
How long does it last?
Half-life is a property of the nucleus alone. Heat, pressure and chemistry do not change it, which is what makes radiometric dating work.
The math
How to convert yr to λ (1/s)
The three describe the same decay: λ = 0.693 ÷ half-life, and mean lifetime = half-life ÷ 0.693. The 0.693 is the natural logarithm of 2.
Example: 5,730 yr = 3.833×10⁻¹² λ (1/s).
Every unit
Your half-life in every unit
Tables
yr to λ (1/s) conversion table
| yr | λ (1/s) |
|---|---|
| 1 yr | 2.196×10⁻⁸ λ (1/s) |
| 60 yr | 3.661×10⁻¹⁰ λ (1/s) |
| 3,600 yr | 6.101×10⁻¹² λ (1/s) |
| 86,400 yr | 2.542×10⁻¹³ λ (1/s) |
| 1,000,000 yr | 2.196×10⁻¹⁴ λ (1/s) |
| 100,000,000 yr | 2.196×10⁻¹⁶ λ (1/s) |
| 1×10¹⁰ yr | 2.196×10⁻¹⁸ λ (1/s) |
| 1.8×10¹¹ yr | 1.22×10⁻¹⁹ λ (1/s) |
| 1.4×10¹⁷ yr | 1.569×10⁻²⁵ λ (1/s) |
λ (1/s) to yr conversion table
| λ (1/s) | yr |
|---|---|
| 1 λ (1/s) | 2.196×10⁻⁸ yr |
| 60 λ (1/s) | 3.661×10⁻¹⁰ yr |
| 3,600 λ (1/s) | 6.101×10⁻¹² yr |
| 86,400 λ (1/s) | 2.542×10⁻¹³ yr |
| 1,000,000 λ (1/s) | 2.196×10⁻¹⁴ yr |
| 100,000,000 λ (1/s) | 2.196×10⁻¹⁶ yr |
| 1×10¹⁰ λ (1/s) | 2.196×10⁻¹⁸ yr |
| 1.8×10¹¹ λ (1/s) | 1.22×10⁻¹⁹ yr |
| 1.4×10¹⁷ λ (1/s) | 1.569×10⁻²⁵ yr |
Quick answers
Quick answers
- How many λ (1/s) is 1 yr?
- 1 yr is 2.196×10⁻⁸ λ (1/s).
- How many λ (1/s) is 10 yr?
- 10 yr is 2.196×10⁻⁹ λ (1/s).
- How many λ (1/s) is 5,730 yr?
- 5,730 yr is 3.833×10⁻¹² λ (1/s).
The units
About these units
Years (yr)
From caesium-137 at 30 years to uranium at billions.
Decay constant per second (λ (1/s))
The chance per second that any one atom decays.
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