Radioactivity
mCitokCi
Convert millicuries (mCi) to kilocuries (kCi).
Factor1 mCi = 1e-6 kCi
Converter
mCi
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kCi
Rendered to 6 significant figures.
Formula
Formula
kCi = mCi × 1e-6
Multiply any value in millicuries by 1e-6 to obtain the value in kilocuries.
Worked example
Convert 1.00000e+6 mCi to kCi.
- 01Start with 1.00000e+6 mCi.
- 02Multiply by the conversion factor: 1.00000e+6 × 1e-6 = 1 kCi.
Result1.00000e+6 mCi = 1 kCi
Conversion table
| mCi | kCi |
|---|---|
| 1 | 1e-6 |
| 2 | 2e-6 |
| 5 | 5e-6 |
| 10 | 1e-5 |
| 20 | 2e-5 |
| 50 | 5e-5 |
| 100 | 0.0001 |
| 200 | 0.0002 |
| 500 | 0.0005 |
| 1000 | 0.001 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mCi to kCi?
1 mCi equals 1e-6 kCi. To convert, multiply the value in millicuries by 1e-6.
How do I convert 1 mCi to kCi?
1 mCi = 1e-6 kCi. For any value, multiply by 1e-6.
How do I convert kCi back to mCi?
Divide by the same factor — or equivalently, multiply by 1000000. So 1 kCi = 1.00000e+6 mCi.
When would I need to convert millicurie to kilocurie?
Radioactivity (activity) conversions between mCi and kCi are routine in health physics, nuclear medicine ordering, environmental monitoring, radiopharmacy and reactor/accelerator-source documentation. The becquerel (Bq) is the SI unit; the curie (Ci) is the legacy unit (1 Ci ≡ 3.7×10¹⁰ Bq exactly). This category is strictly activity (decays per second) — it does NOT cover absorbed dose (Gy, rad), dose equivalent (Sv, rem), exposure or dose rate, all of which are different physical quantities and live in separate categories.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).