Milligrams to Hectograms
Type a value in either box to convert between milligrams and hectograms. The factor is 1e-05.
| Milligrams | Hectograms |
|---|---|
| 1 mg | 1e-05 hg |
| 2 mg | 2e-05 hg |
| 3 mg | 3e-05 hg |
| 5 mg | 5e-05 hg |
| 10 mg | 0.0001 hg |
| 25 mg | 0.00025 hg |
| 50 mg | 0.0005 hg |
| 100 mg | 0.001 hg |
How to use
- Enter a value in the Milligrams field.
- The Hectograms figure appears immediately — no button to press.
- Typing in the Hectograms field converts back to Milligrams the same way.
- Use the reference table for the values that come up most often.
Milligrams to Hectograms formula
Converting milligrams to hectograms is a single multiplication by 1e-05.
hg = mg × 1e-05
Read in reverse, one hectogram is exactly 100,000 milligrams.
Why this factor: the milligram and the hectogram are both defined against the kilogram, so dividing one definition by the other gives 1e-05 directly. Both definitions are set out in full below.
To go the other way, divide by 1e-05 — or use the Hectograms to Milligrams converter, which is the same calculation reversed.
Worked example
Given 150 mg, multiplying by 1e-05 yields 0.0015 hg.
150 mg × 1e-05 = 0.0015 hg
The converter above does this for any value you type, in either direction.
What is a milligram?
A milligram is one thousandth of a gram — the standard unit for drug doses and micronutrients.
Definition: Exactly 1×10⁻⁶ kilogram by SI prefix definition.
Where it is used: Medication dosages, vitamin and mineral content, and analytical chemistry.
What is a hectogram?
A hectogram is 100 grams — one tenth of a kilogram.
Definition: Exactly 0.1 kilogram by SI prefix definition.
Where it is used: Seen on Italian and some other European food labels and deli scales, where prices are quoted per 'etto'.
Milligrams vs Hectograms
The milligram and the hectogram belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many hectograms are in a milligram?
One milligram equals 1e-05 hectograms.
What is the formula to convert milligrams to hectograms?
Multiply the number of milligrams by 1e-05. To reverse it, divide by 1e-05 instead.
How do I convert hectograms back to milligrams?
Divide by 1e-05, which is the same as multiplying by 100000.
How many hectograms are in 10 milligrams?
10 mg works out to 0.0001 hg.
How is the milligram defined?
Exactly 1×10⁻⁶ kilogram by SI prefix definition.