Curies to Becquerels Converter
Enter a value in curies (Ci, mCi, or µCi) and instantly see the equivalent in becquerels, kilobecquerels, megabecquerels, or gigabecquerels.
Enter Radioactivity
Exact factor: 1 Ci = 3.7 × 1010 Bq |
1 mCi = 3.7 × 107 Bq | 1 µCi = 3.7 × 104 Bq
Result
Becquerels (Bq)
—
Base SI unit
Kilobecquerels (kBq)
—
× 10³ Bq
Megabecquerels (MBq)
—
× 10⁶ Bq
Gigabecquerels (GBq)
—
× 10⁹ Bq
Quick Reference Table
| Curies (Ci) | Becquerels (Bq) | MBq | Common context |
|---|---|---|---|
| 1 µCi | 37,000 | 0.037 | Small lab tracer dose |
| 1 mCi | 37,000,000 | 37 | Typical nuclear medicine diagnostic dose |
| 10 mCi | 370,000,000 | 370 | Thyroid scan activity |
| 1 Ci | 37,000,000,000 | 37,000 | Industrial sealed source |
| 1,000 Ci | 3.7 × 10¹³ | 3.7 × 10⁷ | Large irradiator / spent fuel |
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Summary
Enter a value in curies (Ci, mCi, or µCi) and instantly see the equivalent in becquerels, kilobecquerels, megabecquerels, or gigabecquerels.
How it works
- Select your input unit: Ci (curie), mCi (millicurie), or µCi (microcurie).
- Enter the radioactivity value in the input field.
- The converter multiplies by the appropriate factor to get becquerels.
- Results are shown in Bq, kBq, MBq, and GBq simultaneously.
- Copy any result with one click.
Use cases
- Convert legacy nuclear medicine doses from mCi to MBq for modern reporting.
- Translate Ci-based laboratory source activities into SI units for documentation.
- Cross-check radioactive waste classifications that mix Ci and Bq values.
- Convert radiation safety limits between traditional and SI unit systems.
- Verify instrument calibration specifications listed in different unit systems.
- Prepare patient records that require both Ci and Bq values.
Frequently Asked Questions
Last updated: 2026-07-23 ·
Reviewed by Nham Vu