Radioactivity
mCitonCi
Convert millicuries (mCi) to nanocuries (nCi).
Factor1 mCi = 1000000 nCi
Converter
mCi
Accepts numbers or expressions, e.g. 150 + 14.7
Result
nCi
Rendered to 6 significant figures.
Formula
Formula
nCi = mCi × 1000000
Multiply any value in millicuries by 1000000 to obtain the value in nanocuries.
Worked example
Convert 1 mCi to nCi.
- 01Start with 1 mCi.
- 02Multiply by the conversion factor: 1 × 1000000 = 1.00000e+6 nCi.
Result1 mCi = 1.00000e+6 nCi
Conversion table
| mCi | nCi |
|---|---|
| 1 | 1.0000e+6 |
| 2 | 2.0000e+6 |
| 5 | 5.0000e+6 |
| 10 | 1e+7 |
| 20 | 2e+7 |
| 50 | 5e+7 |
| 100 | 1e+8 |
| 200 | 2e+8 |
| 500 | 5e+8 |
| 1000 | 1e+9 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mCi to nCi?
1 mCi equals 1000000 nCi. To convert, multiply the value in millicuries by 1000000.
How do I convert 1 mCi to nCi?
1 mCi = 1.00000e+6 nCi. For any value, multiply by 1000000.
How do I convert nCi back to mCi?
Divide by the same factor — or equivalently, multiply by 1e-6. So 1 nCi = 1e-6 mCi.
When would I need to convert millicurie to nanocurie?
Radioactivity (activity) conversions between mCi and nCi 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).