Convert Gram to Microgram
Convert grams to micrograms instantly. 1 gram = 1000000 microgram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Microgram to Gram converter for the reverse conversion.
Units explained
Gram
The gram (g) equals one-thousandth of a kilogram.
From Late Latin 'gramma', a small weight or scruple.
The everyday metric unit for food, medicine, and small objects.
Defined in 1795 as the mass of one cubic centimeter of water at melting point.
Microgram
A microgram (ug) equals 10^-9 kilogram, or one-millionth of a gram.
From the SI prefix 'micro-' (from Greek 'mikros', small).
Trace nutrients, potent drug doses, and environmental contaminant levels.
The micro- prefix was incorporated into the SI in 1960.
Gram to Microgram conversion formula
The relationship between grams and micrograms:
To convert grams to micrograms, multiply the value in grams by 1000000. To reverse, multiply micrograms by 1e-6.
How to use this converter
Type a value into the calculator. The result in micrograms updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Microgram to Gram converter for the reverse direction.
Step-by-step: convert grams to micrograms
- Write down the value in grams (g).
- Multiply that value by the factor 1000000.
- The product is the equivalent value in micrograms (µg).
- To reverse, multiply the microgram value by 1e-6.
Worked examples
Example 1 — Convert 1 g to µg:
1 × 1000000 = 1000000 µg
Example 2 — Convert 100 g to µg:
100 × 1000000 = 1e+8 µg
Real-world example — Centimeter to wavelength scale
One gram equals 10 million micrograms. Physics curricula use this kind of conversion to relate everyday measurements to atomic and optical scales.
1 g × 1000000 = 1000000 µg
Real-world example — Small-scale to atomic-scale
One gram equals 10 million micrograms — useful for physics curricula that relate everyday measurements to atomic and optical scales.
1 g × 1000000 = 1000000 µg
Gram to Microgram conversion table
Standard reference values for converting grams to micrograms:
| Gram [g] | Microgram [µg] |
|---|---|
| 0.01 | 10000 |
| 0.1 | 100000 |
| 1 | 1000000 |
| 2 | 2000000 |
| 3 | 3000000 |
| 4 | 4000000 |
| 5 | 5000000 |
| 10 | 1e+7 |
| 20 | 2e+7 |
| 30 | 3e+7 |
| 40 | 4e+7 |
| 50 | 5e+7 |
| 100 | 1e+8 |
| 500 | 5e+8 |
| 1000 | 1e+9 |
Frequently asked questions
How many micrograms is 1 gram?
How do I convert grams to micrograms?
How do I convert micrograms back to grams?
How many micrograms is 100 grams?
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Sources & references
Conversion factor (1 g = 1000000 µg) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.