Radioactivity
kCitoCi
Convert kilocuries (kCi) to curies (Ci).
Factor1 kCi = 1000 Ci
Converter
kCi
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Ci
Rendered to 6 significant figures.
Formula
Formula
Ci = kCi × 1000
Multiply any value in kilocuries by 1000 to obtain the value in curies.
Worked example
Convert 1 kCi to Ci.
- 01Start with 1 kCi.
- 02Multiply by the conversion factor: 1 × 1000 = 1000 Ci.
Result1 kCi = 1000 Ci
Conversion table
| kCi | Ci |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 1.0000e+5 |
| 200 | 2.0000e+5 |
| 500 | 5.0000e+5 |
| 1000 | 1.0000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kCi to Ci?
1 kCi equals 1000 Ci. To convert, multiply the value in kilocuries by 1000.
How do I convert 1 kCi to Ci?
1 kCi = 1000 Ci. For any value, multiply by 1000.
How do I convert Ci back to kCi?
Divide by the same factor — or equivalently, multiply by 0.001. So 1 Ci = 0.001 kCi.
When would I need to convert kilocurie to curie?
Radioactivity (activity) conversions between kCi and Ci 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).