MCG to MG Converter
Type a value in micrograms to see it in milligrams as you type, with the exact formula and a reference chart.
- Free
- No sign-up
- Private
How this was calculated
- 1 milligram = 1,000 micrograms
- 1,000 ÷ 1,000 = 1 mg
| mcg | mg |
|---|---|
| 1 mcg | 0.001 mg |
| 5 mcg | 0.005 mg |
| 10 mcg | 0.01 mg |
| 15 mcg | 0.015 mg |
| 20 mcg | 0.02 mg |
| 25 mcg | 0.025 mg |
| 50 mcg | 0.05 mg |
| 100 mcg | 0.1 mg |
| 150 mcg | 0.15 mg |
| 200 mcg | 0.2 mg |
| 250 mcg | 0.25 mg |
| 300 mcg | 0.3 mg |
| 400 mcg | 0.4 mg |
| 500 mcg | 0.5 mg |
| 600 mcg | 0.6 mg |
| 800 mcg | 0.8 mg |
| 1,000 mcg | 1 mg |
| 1,500 mcg | 1.5 mg |
| 2,000 mcg | 2 mg |
| 2,500 mcg | 2.5 mg |
| 5,000 mcg | 5 mg |
| 10,000 mcg | 10 mg |
| mg | mcg |
|---|---|
| 0.025 mg | 25 mcg |
| 0.05 mg | 50 mcg |
| 0.075 mg | 75 mcg |
| 0.1 mg | 100 mcg |
| 0.125 mg | 125 mcg |
| 0.15 mg | 150 mcg |
| 0.2 mg | 200 mcg |
| 0.25 mg | 250 mcg |
| 0.3 mg | 300 mcg |
| 0.4 mg | 400 mcg |
| 0.5 mg | 500 mcg |
| 0.75 mg | 750 mcg |
How to convert micrograms to milligrams
1 microgram = 0.001 milligrams. To convert micrograms to milligrams, divide by 1,000 (or multiply by 0.001). A microgram (mcg or µg) is one millionth of a gram, one thousandth of a milligram. A milligram is one thousandth of a gram.
Worked examples
- 400 micrograms = 0.4 mg (400 ÷ 1,000)
- 1,000 micrograms = 1 mg (1,000 ÷ 1,000)
- 2,500 micrograms = 2.5 mg (2,500 ÷ 1,000)
Where this conversion comes up
Micrograms are used for vitamin D, B12, folate and thyroid medication doses; milligrams for medicine doses, vitamins, caffeine and sodium on labels. Supplement and prescription doses are often listed in micrograms: 1,000 mcg make a milligram, so a 400 mcg folic-acid tablet is 0.4 mg and a 2,500 mcg B12 tablet is 2.5 mg. On labels mcg and µg mean the same thing.
Quick estimate
Divide by 1,000: move the decimal point three places left.
Common mistakes
- Multiplying instead of dividing. A milligram is larger than a microgram, so the number of milligrams must come out smaller: 400 micrograms = 0.4 mg.
Going the other way? Use the mg to mcg converter. Related weight converters: grams to ounces, oz to grams, oz to lbs, lbs to oz, grams to pounds, pounds to grams.
Frequently asked questions
How do you convert micrograms to milligrams?
Multiply the micrograms by 0.001 (or divide by 1,000). For example, 1,000 micrograms is 1 milligrams.
How many milligrams are in one microgram?
One microgram is 0.001 milligrams. A microgram (mcg or µg) is one millionth of a gram, one thousandth of a milligram.
What is 2,500 micrograms in milligrams?
2,500 micrograms is 2.5 milligrams.
Is there a quick way to estimate micrograms to milligrams?
Divide by 1,000: move the decimal point three places left.
Popular conversions
Most searched
All mcg to mg answers
- 0.5 mcg to mg
- 1 mcg to mg
- 2 mcg to mg
- 2.4 mcg to mg
- 2.5 mcg to mg
- 5 mcg to mg
- 10 mcg to mg
- 15 mcg to mg
- 20 mcg to mg
- 25 mcg to mg
- 30 mcg to mg
- 40 mcg to mg
- 50 mcg to mg
- 75 mcg to mg
- 90 mcg to mg
- 100 mcg to mg
- 120 mcg to mg
- 125 mcg to mg
- 150 mcg to mg
- 200 mcg to mg
- 250 mcg to mg
- 300 mcg to mg
- 400 mcg to mg
- 500 mcg to mg
- 600 mcg to mg
- 750 mcg to mg
- 800 mcg to mg
- 1,000 mcg to mg
- 1,250 mcg to mg
- 1,500 mcg to mg
- 2,000 mcg to mg
- 2,500 mcg to mg
- 3,000 mcg to mg
- 5,000 mcg to mg
- 10,000 mcg to mg