Millicuries to Microcuries Converter
Enter the radioactive activity in millicuries below to convert it to microcuries.
Convert Millicuries to Microcuries
Enter a value in millicuries (mCi) to convert to microcuries (µCi).
Millicurie to Microcurie Conversion Table
Table showing various millicurie measurements converted to microcuries. Click any preset value or arrow to load it into the converter.
| Millicuries (mCi) | Microcuries (µCi) |
|---|---|
| 1 mCi | 1,000 µCi |
| 2 mCi | 2,000 µCi |
| 2.5 mCi | 2,500 µCi |
| 5 mCi | 5,000 µCi |
| 10 mCi | 10,000 µCi |
| 15 mCi | 15,000 µCi |
| 20 mCi | 20,000 µCi |
| 25 mCi | 25,000 µCi |
| 30 mCi | 30,000 µCi |
| 50 mCi | 50,000 µCi |
How to Convert Millicuries to Microcuries
To convert millicuries to microcuries, multiply the radioactive activity by the following conversion ratio: 1,000 microcuries/millicurie.
Since one millicurie is equal to 1,000 microcuries, you can use this simple formula to convert:
The radioactive activity in microcuries is equal to the radioactive activity in millicuries multiplied by 1,000.
For example, here's how to convert 5 millicuries to microcuries using the formula above.
How Many Microcuries Are in a Millicurie?
There are 1,000 microcuries in a millicurie, which is why we use this value in the formula above.
Our millicurie to microcurie calculator automatically converts your radioactive activity measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Millicuries and microcuries are both units used to measure radioactive activity. Keep reading to learn more about each unit.
What Is a Millicurie?
A millicurie is a unit of radioactive activity equal to 37,000,000 becquerels (Bq), the base unit for radioactive activity. Equal to 37 Megabecquerels (3.7×10⁷ Bq). [1]
The millicurie is classified as a standard unit of radioactive activity. Millicuries can be abbreviated as mCi; for example, 1 millicurie can be written as 1 mCi.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millicurie (mCi) a convenient decimal multiple of the becquerel (Bq).
In practice, millicuries (mCi) 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 millicuries (mCi) and microcuries (µCi), keep full floating-point precision (1 mCi = 1,000 µCi; 1 µCi = 0.001 mCi) during intermediate calculations and round only the final microcurie figure to match your instrument tolerance.
More Millicurie & Microcurie Conversions
Need to calculate in the opposite direction? Use our microcuries to millicuries calculator to switch your starting unit immediately. You can also explore related tools such as converting microcuries to millicuries, converting becquerels to kilobecquerels, or converting kilobecquerels to becquerels.
Convert from Millicuries
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Radiation-Activity Metrology Standard — Millicuries (mCi) to Microcuries (µCi)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Millicurie (mCi) & Microcurie (µCi)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (mCi to µCi)