Radioactivity
dpstomCi
Convert disintegrations per second (dps) to millicuries (mCi).
Factor1 dps = 2.702703e-8 mCi
Converter
dps
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mCi
Rendered to 6 significant figures.
Formula
Formula
mCi = dps × 2.702703e-8
Multiply any value in disintegrations per second by 2.702703e-8 to obtain the value in millicuries.
Worked example
Convert 1e+8 dps to mCi.
- 01Start with 1e+8 dps.
- 02Multiply by the conversion factor: 1e+8 × 2.702703e-8 = 2.7027 mCi.
Result1e+8 dps = 2.7027 mCi
Conversion table
| dps | mCi |
|---|---|
| 1 | 2.7027e-8 |
| 2 | 5.4054e-8 |
| 5 | 1.3514e-7 |
| 10 | 2.7027e-7 |
| 20 | 5.4054e-7 |
| 50 | 1.3514e-6 |
| 100 | 2.7027e-6 |
| 200 | 5.4054e-6 |
| 500 | 1.3514e-5 |
| 1000 | 2.7027e-5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from dps to mCi?
1 dps equals 2.702703e-8 mCi. To convert, multiply the value in disintegrations per second by 2.702703e-8.
How do I convert 1 dps to mCi?
1 dps = 2.7027e-8 mCi. For any value, multiply by 2.702703e-8.
How do I convert mCi back to dps?
Divide by the same factor — or equivalently, multiply by 3.7e+7. So 1 mCi = 3.7e+7 dps.
When would I need to convert disintegration per second to millicurie?
Radioactivity (activity) conversions between dps and mCi 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).