Radioactivity
nCitodpm
Convert nanocuries (nCi) to disintegrations per minute (dpm).
Factor1 nCi = 2220 dpm
Converter
nCi
Accepts numbers or expressions, e.g. 150 + 14.7
Result
dpm
Rendered to 6 significant figures.
Formula
Formula
dpm = nCi × 2220
Multiply any value in nanocuries by 2220 to obtain the value in disintegrations per minute.
Worked example
Convert 1 nCi to dpm.
- 01Start with 1 nCi.
- 02Multiply by the conversion factor: 1 × 2220 = 2220 dpm.
Result1 nCi = 2220 dpm
Conversion table
| nCi | dpm |
|---|---|
| 1 | 2220 |
| 2 | 4440 |
| 5 | 11100 |
| 10 | 22200 |
| 20 | 44400 |
| 50 | 1.1100e+5 |
| 100 | 2.2200e+5 |
| 200 | 4.4400e+5 |
| 500 | 1.1100e+6 |
| 1000 | 2.2200e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from nCi to dpm?
1 nCi equals 2220 dpm. To convert, multiply the value in nanocuries by 2220.
How do I convert 1 nCi to dpm?
1 nCi = 2220 dpm. For any value, multiply by 2220.
How do I convert dpm back to nCi?
Divide by the same factor — or equivalently, multiply by 0.0004504505. So 1 dpm = 0.00045045 nCi.
When would I need to convert nanocurie to disintegration per minute?
Radioactivity (activity) conversions between nCi and dpm 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).