Curies to Rutherfords Converter
Enter the radioactive activity in curies below to convert it to rutherfords.
Convert Curies to Rutherfords
Enter a value in curies (Ci) to convert to rutherfords (Rd).
Curie to Rutherford Conversion Table
Table showing various curie measurements converted to rutherfords. Click any preset value or arrow to load it into the converter.
| Curies (Ci) | Rutherfords (Rd) |
|---|---|
| 1 Ci | 37,000 Rd |
| 2 Ci | 74,000 Rd |
| 2.5 Ci | 92,500 Rd |
| 5 Ci | 185,000 Rd |
| 10 Ci | 370,000 Rd |
| 15 Ci | 555,000 Rd |
| 20 Ci | 740,000 Rd |
| 25 Ci | 925,000 Rd |
| 30 Ci | 1,110,000 Rd |
| 50 Ci | 1,850,000 Rd |
How to Convert Curies to Rutherfords
To convert curies to rutherfords, multiply the radioactive activity by the following conversion ratio: 37,000 rutherfords/curie.
Since one curie is equal to 37,000 rutherfords, you can use this simple formula to convert:
The radioactive activity in rutherfords is equal to the radioactive activity in curies multiplied by 37,000.
For example, here's how to convert 5 curies to rutherfords using the formula above.
How Many Rutherfords Are in a Curie?
There are 37,000 rutherfords in a curie, which is why we use this value in the formula above.
Our curie to rutherford calculator automatically converts your radioactive activity measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Curies and rutherfords 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 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 curies (Ci) and rutherfords (Rd), keep full floating-point precision (1 Ci = 37,000 Rd; 1 Rd = 0.000027027 Ci) during intermediate calculations and round only the final rutherford figure to match your instrument tolerance.
More Curie & Rutherford Conversions
Need to calculate in the opposite direction? Use our rutherfords to curies calculator to switch your starting unit immediately. You can also explore related tools such as converting rutherfords 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 Rutherfords (Rd)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Curie (Ci) & Rutherford (Rd)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (Ci to Rd)