Millicuries to Rutherfords Converter
Enter the radioactive activity in millicuries below to convert it to rutherfords.
Convert Millicuries to Rutherfords
Enter a value in millicuries (mCi) to convert to rutherfords (Rd).
Millicurie to Rutherford Conversion Table
Table showing various millicurie measurements converted to rutherfords. Click any preset value or arrow to load it into the converter.
How to Convert Millicuries to Rutherfords
To convert millicuries to rutherfords, multiply the radioactive activity by the following conversion ratio: 37 rutherfords/millicurie.
Since one millicurie is equal to 37 rutherfords, you can use this simple formula to convert:
The radioactive activity in rutherfords is equal to the radioactive activity in millicuries multiplied by 37.
For example, here's how to convert 5 millicuries to rutherfords using the formula above.
How Many Rutherfords Are in a Millicurie?
There are 37 rutherfords in a millicurie, which is why we use this value in the formula above.
Our millicurie to rutherford calculator automatically converts your radioactive activity measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Millicuries and rutherfords 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 Rutherford?
A rutherford is a unit of radioactive activity equal to 1,000,000 becquerels (Bq), the base unit for radioactive activity. Equal to 1 Megabecquerel (10⁶ decays/s). [2]
The rutherford is classified as a standard unit of radioactive activity. Rutherfords can be abbreviated as Rd; for example, 1 rutherford can be written as 1 Rd.
When working with rutherfords (Rd) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, rutherfords (Rd) 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 rutherfords (Rd), keep full floating-point precision (1 mCi = 37 Rd; 1 Rd = 0.027027 mCi) during intermediate calculations and round only the final rutherford figure to match your instrument tolerance.
More Millicurie & Rutherford Conversions
Need to calculate in the opposite direction? Use our rutherfords to millicuries calculator to switch your starting unit immediately. You can also explore related tools such as converting rutherfords 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 Rutherfords (Rd)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Millicurie (mCi) & Rutherford (Rd)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (mCi to Rd)