Radioactivity
dpmtopCi
Convert disintegrations per minute (dpm) to picocuries (pCi).
Factor1 dpm = 0.4504505 pCi
Converter
dpm
Accepts numbers or expressions, e.g. 150 + 14.7
Result
pCi
Rendered to 6 significant figures.
Formula
Formula
pCi = dpm × 0.4504505
Multiply any value in disintegrations per minute by 0.4504505 to obtain the value in picocuries.
Worked example
Convert 10 dpm to pCi.
- 01Start with 10 dpm.
- 02Multiply by the conversion factor: 10 × 0.4504505 = 4.5045 pCi.
Result10 dpm = 4.5045 pCi
Conversion table
| dpm | pCi |
|---|---|
| 1 | 0.45045 |
| 2 | 0.9009 |
| 5 | 2.2523 |
| 10 | 4.5045 |
| 20 | 9.009 |
| 50 | 22.523 |
| 100 | 45.045 |
| 200 | 90.09 |
| 500 | 225.23 |
| 1000 | 450.45 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from dpm to pCi?
1 dpm equals 0.4504505 pCi. To convert, multiply the value in disintegrations per minute by 0.4504505.
How do I convert 1 dpm to pCi?
1 dpm = 0.45045 pCi. For any value, multiply by 0.4504505.
How do I convert pCi back to dpm?
Divide by the same factor — or equivalently, multiply by 2.22. So 1 pCi = 2.22 dpm.
When would I need to convert disintegration per minute to picocurie?
Radioactivity (activity) conversions between dpm and pCi 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).