Curies to Microcuries Converter
Enter the radioactive activity in curies below to convert it to microcuries.
Convert Curies to Microcuries
Enter a value in curies (Ci) to convert to microcuries (µCi).
Curie to Microcurie Conversion Table
Table showing various curie measurements converted to microcuries. Click any preset value or arrow to load it into the converter.
How to Convert Curies to Microcuries
To convert curies to microcuries, multiply the radioactive activity by the following conversion ratio: 1,000,000 microcuries/curie.
Since one curie is equal to 1,000,000 microcuries, you can use this simple formula to convert:
The radioactive activity in microcuries is equal to the radioactive activity in curies multiplied by 1,000,000.
For example, here's how to convert 5 curies to microcuries using the formula above.
How Many Microcuries Are in a Curie?
There are 1,000,000 microcuries in a curie, which is why we use this value in the formula above.
Our curie to microcurie calculator automatically converts your radioactive activity measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Curies and microcuries 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 Microcurie?
A microcurie is a unit of radioactive activity equal to 37,000 becquerels (Bq), the base unit for radioactive activity. Equal to 37 Kilobecquerels (37,000 Bq). [2]
The microcurie is classified as a standard unit of radioactive activity. Microcuries can be abbreviated as µCi; for example, 1 microcurie can be written as 1 µCi.
In the metric system, "micro" is the standard SI prefix for millionths, or 10⁻⁶. This makes the microcurie (µCi) a convenient decimal multiple of the becquerel (Bq).
In practice, microcuries (µCi) are widely used across large-scale industrial, bulk, and macro-level radioactive activity specifications within international standard workflows, engineering documentation, and technical data sheets.
When converting radioactive activity between curies (Ci) and microcuries (µCi), keep full floating-point precision (1 Ci = 1,000,000 µCi; 1 µCi = 0.000001 Ci) during intermediate calculations and round only the final microcurie figure to match your instrument tolerance.
More Curie & Microcurie Conversions
Need to calculate in the opposite direction? Use our microcuries to curies calculator to switch your starting unit immediately. You can also explore related tools such as converting microcuries to curies, converting becquerels to kilobecquerels, or converting kilobecquerels to becquerels.
Convert from Curies
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Radiation-Activity Metrology Standard — Curies (Ci) to Microcuries (µCi)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Curie (Ci) & Microcurie (µCi)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (Ci to µCi)