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Carbon Dating Calculator
Age of a sample from the fraction of carbon-14 remaining using the half-life of 5,730 years.
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Age of a sample from the fraction of carbon-14 remaining using the half-life of 5,730 years.
Carbon Dating Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: t = -t_half x ln(N/N0) / ln 2.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Carbon Quick Guide
Typical values for reference.
| Remaining | Half-lives | Age | Note |
|---|---|---|---|
| 100% | 0 | 0 years | C-14 |
| 50% | 1 | 5,730 years | C-14 |
| 25% | 2 | 11,460 years | C-14 |
| 12.5% | 3 | 17,190 years | C-14 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Carbon Dating Calculator FAQ
Answers to common questions about this calculator.
It measures how much carbon-14 is left compared with living material.
About 50,000 years.
t = -t_half x ln(N/N0) / ln 2.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.