Mass converter
Convert mg to µg — milligram to microgram
Convert milligrams (mg) to micrograms (µg) instantly. 1 mg = 1,000 µg. Free calculator with formula, conversion table, and g base-unit equivalent.
Also searched as: mg to ug, milli gram to micro gram, milli to micro gram, milli grams to micro grams.
- Scientific Notation
- 5 × 10² µg
- Real-World Context
- 1 mg is roughly the weight of a small grain of sand
- Step-by-Step
- 1. Start with 0.5 mg. 2. Since 1 milli-unit = 1,000 micro-units, multiply by 1,000. 3. 0.5 × 1,000 = 500 µg.
- Formula Used
- × 1,000 (milli = 10⁻³, micro = 10⁻⁶)
Quick Conversions
| Mega | 5 × 10⁻¹⁰ Mg |
|---|---|
| Kilo | 5 × 10⁻⁷ kg |
| Base Unit (grams) | 0.0005 grams |
| Nano | 500,000 ng |
| Pico | 500,000,000 pg |
Quick mg to µg answer
1 mg = 1,000 µg
multiply by 1,000
0.5 mg = 500 µg
milligram to microgram formula
Milli is 10^-3 and micro is 10^-6. They are three powers of ten apart, so every mg to µg conversion uses the exact factor 1,000.
µg = mg × 1,000
0.5 mg × 1,000 = 500 µgmg to µg table
Common values for milligrams converted to microgramsand the base unit (g).
| milligrams | micrograms | grams |
|---|---|---|
| 0.001 mg | 1 µg | 0.000001 g |
| 0.01 mg | 10 µg | 0.00001 g |
| 0.1 mg | 100 µg | 0.0001 g |
| 1 mg | 1,000 µg | 0.001 g |
| 2 mg | 2,000 µg | 0.002 g |
| 5 mg | 5,000 µg | 0.005 g |
| 10 mg | 10,000 µg | 0.01 g |
| 20 mg | 20,000 µg | 0.02 g |
| 50 mg | 50,000 µg | 0.05 g |
| 100 mg | 100,000 µg | 0.1 g |
| 1,000 mg | 1,000,000 µg | 1 g |
Understanding milligrams and micrograms
A milligram (mg) is 10⁻³ of the base unit (gram) and a microgram (µg) is 10⁻⁶. They sit three powers of ten apart, so going from mg to µg means multiplying by exactly 1,000 — move the decimal point three places to the right.
Milligrams are the unit of tablet strengths, analytical balance readings and reagent weighing. Most lab balances resolve to 0.1 mg, so anything below about 1 mg is being estimated rather than measured on standard equipment.
This calculator shifts the decimal exponent rather than multiplying in binary floating point, so 0.5 mg returns exactly 500 µg — not a value with a trailing rounding error.
Common mg to µg mistake
Older labels and some regions still write 'mcg' for microgram to avoid handwritten µ being read as m. Treat mcg and µg as identical, and never abbreviate microgram as 'ug' on anything clinical.
When to use mg vs µg
milligrams and micrograms are used for lab samples, supplement labels, chemistry prep, and medication-strength notation. Use the larger milli unit when the number becomes easier to scan, and the smaller micro unit when you need finer detail.