Radioactivity
mCitoµCi
Convert millicuries (mCi) to microcuries (µCi).
Factor1 mCi = 1000 µCi
Converter
mCi
Accepts numbers or expressions, e.g. 150 + 14.7
Result
µCi
Rendered to 6 significant figures.
Formula
Formula
µCi = mCi × 1000
Multiply any value in millicuries by 1000 to obtain the value in microcuries.
Worked example
Convert 1 mCi to µCi.
- 01Start with 1 mCi.
- 02Multiply by the conversion factor: 1 × 1000 = 1000 µCi.
Result1 mCi = 1000 µCi
Conversion table
| mCi | µCi |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 1.0000e+5 |
| 200 | 2.0000e+5 |
| 500 | 5.0000e+5 |
| 1000 | 1.0000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mCi to µCi?
1 mCi equals 1000 µCi. To convert, multiply the value in millicuries by 1000.
How do I convert 1 mCi to µCi?
1 mCi = 1000 µCi. For any value, multiply by 1000.
How do I convert µCi back to mCi?
Divide by the same factor — or equivalently, multiply by 0.001. So 1 µCi = 0.001 mCi.
When would I need to convert millicurie to microcurie?
Radioactivity (activity) conversions between mCi and µCi 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).