Radioactivity Converter
Quick answer: Choose a starting unit and a target unit, then enter a value. Common conversions: 1 Bq = 0.001 kBq; 1 Bq = 2.702703×10⁻¹¹ Ci; 1 Bq = 2.702703×10⁻⁸ mCi. This converter covers 9 radioactivity units.
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Use the Radioactivity Converter
Radioactivity formula and what each symbol means
target = value × (factor of starting unit ÷ factor of target unit), where each factor is the unit value in Bq.
| Symbol | Meaning |
|---|---|
| value | The number you want to convert |
| factor | The unit’s size expressed in the base unit (Bq) |
Radioactivity examples
Bq to kBq
10 Bq = 0.01 kBq.
Bq to Ci
10 Bq = 2.702703×10⁻¹⁰ Ci.
Bq to mCi
10 Bq = 2.702703×10⁻⁷ mCi.
How to calculate Radioactivity step by step
- Choose the starting unit and the target unit.
- Enter your value.
- Read the converted value, plus the conversion factor in both directions.
Popular radioactivity conversions
- Becquerels to Kilobecquerels converter
- Becquerels to Curies converter
- Becquerels to Millicuries converter
- Becquerels to Microcuries converter
- Kilobecquerels to Becquerels converter
- Kilobecquerels to Curies converter
- Kilobecquerels to Millicuries converter
- Kilobecquerels to Microcuries converter
- Curies to Becquerels converter
- Curies to Kilobecquerels converter
- Curies to Millicuries converter
- Curies to Microcuries converter
- Millicuries to Becquerels converter
- Millicuries to Kilobecquerels converter
- Millicuries to Curies converter
- Millicuries to Microcuries converter
How to read your Radioactivity result
Radioactivity (activity) is the number of decays per second. The SI unit is the becquerel, one decay per second. One curie is defined as exactly 3.7×10¹⁰ Bq.
| UNIT | SYMBOL | EQUALS | VALUE OF 1 BQ |
|---|---|---|---|
| Becquerel | Bq | 1 Bq = 1 Bq | 1 Bq |
| Kilobecquerel | kBq | 1 kBq = 1,000 Bq | 0.001 kBq |
| Megabecquerel | MBq | 1 MBq = 1,000,000 Bq | 0.000001 MBq |
| Gigabecquerel | GBq | 1 GBq = 1,000,000,000 Bq | 1×10⁻⁹ GBq |
| Curie | Ci | 1 Ci = 37,000,000,000 Bq | 2.702703×10⁻¹¹ Ci |
| Millicurie | mCi | 1 mCi = 37,000,000 Bq | 2.702703×10⁻⁸ mCi |
| Microcurie | µCi | 1 µCi = 37,000 Bq | 0.00002702703 µCi |
| Rutherford | Rd | 1 Rd = 1,000,000 Bq | 0.000001 Rd |
| Disintegration per minute | dpm | 1 dpm = 0.016666667 Bq | 60 dpm |
Common mistakes when calculating Radioactivity
- Confusing activity (Bq, Ci) with absorbed dose (Gy) or dose equivalent (Sv).
- Mixing mCi and µCi, which differ by 1,000.
- Forgetting that a becquerel is a very small unit.
Radioactivity FAQ
How many Bq is 1 Ci?
Exactly 3.7×10¹⁰ Bq.
How many Bq is 1 µCi?
Exactly 37,000 Bq.
What is a becquerel?
One radioactive decay per second.
What is the base unit for radioactivity?
This converter uses becquerel (Bq) as the common base unit: every value is first converted to it and then to the target unit.
How do I convert between two radioactivity units?
Choose the starting and target units, enter the value and read the result. By hand: convert to the base unit with the table, then divide by the target unit factor.
How many kilobecquerels are in 1 becquerel?
1 Bq = 0.001 kBq.
How many curies are in 1 becquerel?
1 Bq = 2.702703×10⁻¹¹ Ci.
How many millicuries are in 1 becquerel?
1 Bq = 2.702703×10⁻⁸ mCi.
Which radioactivity units does this converter support?
It covers 9 units: becquerel (Bq), kilobecquerel (kBq), megabecquerel (MBq), gigabecquerel (GBq), curie (Ci), millicurie (mCi), microcurie (µCi), rutherford (Rd), disintegration per minute (dpm).
How accurate is the radioactivity converter?
Results are calculated at full double precision and shown to about 8 significant figures. Round the answer to the precision of your original measurement; a result cannot be more accurate than the number you started with.
More in Radioactivity converters
- Millicuries to Microcuries Converter
- Millicuries to Kilobecquerels Converter
- Becquerels to Microcuries Converter
- Millicuries to Curies Converter
- Millicuries to Becquerels Converter
- Curies to Becquerels Converter
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST: SI units and derived units, NIST SP 811, Appendix B.8: conversion factors