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Micrograms to Milligrams (μg to mg)
Convert micrograms to milligrams: 1 μg = 0.001 mg. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 μg = 0.001 mg
milligrams = micrograms × 0.001 — reverse: micrograms = milligrams × 1000
The factor is derived from the SI definitions of both units (base unit: kg) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.
Worked examples
- 5 μg = 0.005 mg
- 12.5 μg = 0.0125 mg
- 100 μg = 0.1 mg
Micrograms to milligrams conversion table
| Micrograms (μg) | Milligrams (mg) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 6 | 0.006 |
| 7 | 0.007 |
| 8 | 0.008 |
| 9 | 0.009 |
| 10 | 0.01 |
| 15 | 0.015 |
| 20 | 0.02 |
| 25 | 0.025 |
| 30 | 0.03 |
| 40 | 0.04 |
| 50 | 0.05 |
| 75 | 0.075 |
| 100 | 0.1 |
| 200 | 0.2 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
FAQ
How many milligrams are in one microgram?
1 μg = 0.001 mg. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.
What is the formula to convert micrograms to milligrams?
Multiply the value in micrograms by 0.001: milligrams = micrograms × 0.001. For example, 5 μg = 0.005 mg.
How do I convert milligrams back to micrograms?
Multiply by the inverse factor 1000 (micrograms = milligrams × 1000), or use the milligrams-to-micrograms page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=ug&to_unit=mg - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"ug","to_unit":"mg"} - Markdown: https://tttkmbb.com/conversion/micrograms-to-mg.md · JSON: https://tttkmbb.com/conversion/micrograms-to-mg.json (add
?value=for a result) · Units: /api/v1/units?quantity=mass - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.