Convert Curies to DPM (Ci to dpm)
1 curie (Ci) = 2220000000000 disintegrations per minute (dpm). 1 dpm = 4.504504505 × 10⁻¹³ Ci. Example: 15 Ci = 15 × 2220000000000 = 33300000000000 dpm.
Also searched as curies to dpm, curies in dpm, curies into disintegrations per minute, Ci to dpm, Ci in disintegrations per minute, Ci into disintegration per minute, curie to disintegration per minute, Ci to disintegrations per minute converter and how many disintegrations per minute in a curie.
1 Ci = 2220000000000 dpm
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk curie to disintegration per minute converter to paste a column from Excel.
How to Convert Curie to DPM
- 1 Ci = 2220000000000 dpm
- 1 dpm = 4.504504505 × 10⁻¹³ Ci
- Example: convert 15 Ci to dpm: 15 Ci = 15 × 2220000000000 dpm = 33300000000000 dpm
Formula
dpm = Ci × 2220000000000
Derivation from SI units:
- 1 Ci = 3.7 × 10¹⁰ Bq exactly (originally the activity of 1 g of radium-226).
- 1 dpm = 1/60 Bq.
- 1 Ci = 37000000000 Bq ÷ 0.01666666666667 Bq per dpm = 2220000000000 dpm
Both units are defined exactly, so the factor is exact. Curie definition: curie; DPM definition: disintegration per minute.
Worked examples
- A reading of 2 Ci converts to 4440000000000 dpm.
2 Ci × 2220000000000 = 4440000000000 dpm - A value of 20 Ci is 44400000000000 dpm.
20 Ci × 2220000000000 = 44400000000000 dpm
Curie to DPM conversion table
| Curies (Ci) | DPM |
|---|---|
| 0.1 Ci | 222000000000 dpm |
| 0.5 Ci | 1110000000000 dpm |
| 1 Ci | 2220000000000 dpm |
| 2 Ci | 4440000000000 dpm |
| 5 Ci | 11100000000000 dpm |
| 10 Ci | 22200000000000 dpm |
| 20 Ci | 44400000000000 dpm |
| 50 Ci | 111000000000000 dpm |
| 100 Ci | 222000000000000 dpm |
| 1000 Ci | 2.22 × 10¹⁵ dpm |
Where it's used
Curies are used for US nuclear regulation and licences, while disintegrations per minute appear in wipe tests and contamination surveys. Both measure activity of a radioactive source, so the conversion is a fixed factor.
Curie to other radioactivity units
| Conversion | 1 Ci equals |
|---|---|
| curie to disintegration per minute | 2220000000000 dpm |
| curie to becquerel | 37000000000 Bq |
| curie to megabecquerel | 37000 MBq |
| curie to millicurie | 1000 mCi |
| curie to picocurie | 1000000000000 pCi |
| curie to kilobecquerel | 37000000 kBq |
| curie to gigabecquerel | 37 GBq |
| curie to microcurie | 1000000 µCi |
Show 3 more units
| curie to terabecquerel | 0.037 TBq |
|---|---|
| curie to nanocurie | 1000000000 nCi |
| curie to rutherford | 37000 Rd |
Frequently asked questions
How many disintegrations per minute are in 1 curie?
1 Ci = 2220000000000 dpm.
How do I convert curies to disintegrations per minute?
Multiply the value in Ci by 2220000000000. For example, 15 Ci × 2220000000000 = 33300000000000 dpm.
Is the Ci to dpm conversion exact?
Yes. Both units are defined exactly, and 1 Ci is exactly 2220000000000 dpm.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "curie".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Curies to DPM (Ci to dpm). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/curies-to-dpm/
IEEE
Scientific Converters, "Convert Curies to DPM (Ci to dpm)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/curies-to-dpm/