Curies to Becquerels Converter
Enter the radioactive activity in curies below to convert it to becquerels.
Convert Curies to Becquerels
Enter a value in curies (Ci) to convert to becquerels (Bq).
Curie to Becquerel Conversion Table
Table showing various curie measurements converted to becquerels. Click any preset value or arrow to load it into the converter.
How to Convert Curies to Becquerels
To convert curies to becquerels, multiply the radioactive activity by the following conversion ratio: 37,000,000,000 becquerels/curie.
Since one curie is equal to 37,000,000,000 becquerels, you can use this simple formula to convert:
The radioactive activity in becquerels is equal to the radioactive activity in curies multiplied by 37,000,000,000.
For example, here's how to convert 5 curies to becquerels using the formula above.
How Many Becquerels Are in a Curie?
There are 37,000,000,000 becquerels in a curie, which is why we use this value in the formula above.
Our curie to becquerel calculator automatically converts your radioactive activity measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Curies and becquerels are both units used to measure radioactive activity. Keep reading to learn more about each unit.
What Is a Curie?
A curie is a unit of radioactive activity equal to 37,000,000,000 becquerels (Bq), the base unit for radioactive activity. Traditional radioactivity unit equal to 3.7×10¹⁰ Becquerels (37 GBq). [1]
The curie is classified as a standard unit of radioactive activity. Curies can be abbreviated as Ci; for example, 1 curie can be written as 1 Ci.
When working with curies (Ci) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, curies (Ci) are widely used across large-scale industrial, bulk, and macro-level radioactive activity specifications within international standard workflows, engineering documentation, and technical data sheets.
What Is a Becquerel?
SI derived unit of radioactivity equal to 1 nuclear decay per second. It serves as a primary reference unit for measuring radioactive activity across scientific and practical applications. [2]
The becquerel is classified as an International System of Units (SI) unit of radioactive activity. Becquerels can be abbreviated as Bq; for example, 1 becquerel can be written as 1 Bq.
As the primary coherent reference unit for radioactive activity in this category, all other radioactive activity units are mathematically anchored to the becquerel (Bq).
In practice, becquerels (Bq) are widely used across standard radioactive activity applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting radioactive activity between curies (Ci) and becquerels (Bq), keep full floating-point precision (1 Ci = 37,000,000,000 Bq; 1 Bq = 2.702703e-11 Ci) during intermediate calculations and round only the final becquerel figure to match your instrument tolerance.
More Curie & Becquerel Conversions
Need to calculate in the opposite direction? Use our becquerels to curies calculator to switch your starting unit immediately. You can also explore related tools such as converting becquerels to curies, converting kilobecquerels to becquerels, or converting megabecquerels to becquerels.
Convert from Curies
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Radiation-Activity Metrology Standard — Curies (Ci) to Becquerels (Bq)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Curie (Ci) & Becquerel (Bq)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (Ci to Bq)