Hectograms to Milligrams
Type a value in either box to convert between hectograms and milligrams. The factor is 100000.
| Hectograms | Milligrams |
|---|---|
| 1 hg | 100000 mg |
| 2 hg | 200000 mg |
| 3 hg | 300000 mg |
| 5 hg | 500000 mg |
| 10 hg | 1000000 mg |
| 25 hg | 2500000 mg |
| 50 hg | 5000000 mg |
| 100 hg | 10000000 mg |
How to use
- Enter a value in the Hectograms field.
- The Milligrams figure appears immediately — no button to press.
- Typing in the Milligrams field converts back to Hectograms the same way.
- Use the reference table for the values that come up most often.
Hectograms to Milligrams formula
Converting hectograms to milligrams is a single multiplication by 100000.
mg = hg × 100000
Put another way, one hectogram is exactly 100,000 milligrams.
Why this factor: the hectogram and the milligram are both defined against the kilogram, so dividing one definition by the other gives 100000 directly. Both definitions are set out in full below.
To go the other way, divide by 100000 — or use the Milligrams to Hectograms converter, which is the same calculation reversed.
Worked example
Given 150 hg, multiplying by 100000 yields 15000000 mg.
150 hg × 100000 = 15000000 mg
The converter above does this for any value you type, in either direction.
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'.
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.
Hectograms vs Milligrams
The hectogram and the milligram 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 milligrams are in a hectogram?
One hectogram equals 100000 milligrams.
What is the formula to convert hectograms to milligrams?
Multiply the number of hectograms by 100000. To reverse it, divide by 100000 instead.
How do I convert milligrams back to hectograms?
Divide by 100000, which is the same as multiplying by 1e-05.
How many milligrams are in 10 hectograms?
10 hg works out to 1000000 mg.
How is the hectogram defined?
Exactly 0.1 kilogram by SI prefix definition.