Millions of years to thousands of years
Type a value in Ma to get it in ka instantly.
66,000ka
That's about the same as the end of the dinosaurs. On a calendar of Earth’s whole history, that is 5.306 days before the end.
What it means
How long ago is that?
Dates follow the International Commission on Stratigraphy. Boundaries shift a little as dating methods improve.
The math
How to convert Ma to ka
To convert millions of years to thousands of years, multiply by 1,000.
Example: 66 Ma × 1,000 = 66,000 ka.
In the other direction, 1 ka = 0.001 Ma.
Every unit
Your age in every unit
Tables
Ma to ka conversion table
| Ma | ka |
|---|---|
| 0.01 Ma | 10 ka |
| 0.1 Ma | 100 ka |
| 1 Ma | 1,000 ka |
| 2.6 Ma | 2,600 ka |
| 23 Ma | 23,000 ka |
| 66 Ma | 66,000 ka |
| 145 Ma | 145,000 ka |
| 252 Ma | 252,000 ka |
| 541 Ma | 541,000 ka |
| 1,000 Ma | 1,000,000 ka |
| 2,500 Ma | 2,500,000 ka |
| 4,540 Ma | 4,540,000 ka |
ka to Ma conversion table
| ka | Ma |
|---|---|
| 0.01 ka | 1×10⁻⁵ Ma |
| 0.1 ka | 0.0001 Ma |
| 1 ka | 0.001 Ma |
| 2.6 ka | 0.0026 Ma |
| 23 ka | 0.023 Ma |
| 66 ka | 0.066 Ma |
| 145 ka | 0.145 Ma |
| 252 ka | 0.252 Ma |
| 541 ka | 0.541 Ma |
| 1,000 ka | 1 Ma |
| 2,500 ka | 2.5 Ma |
| 4,540 ka | 4.54 Ma |
Quick answers
Quick answers
- How many ka is 1 Ma?
- 1 Ma is 1,000 ka.
- How many ka is 10 Ma?
- 10 Ma is 10,000 ka.
- How many ka is 66 Ma?
- 66 Ma is 66,000 ka.
The units
About these units
Millions of years (Ma)
The geologist’s standard: a million years, used for most of the fossil record.
Thousands of years (ka)
A thousand years, used for ice ages and archaeology.
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