Hectograms to Kilograms
Type a value in either box to convert between hectograms and kilograms. The factor is 0.1.
| Hectograms | Kilograms |
|---|---|
| 1 hg | 0.1 kg |
| 2 hg | 0.2 kg |
| 3 hg | 0.3 kg |
| 5 hg | 0.5 kg |
| 10 hg | 1 kg |
| 25 hg | 2.5 kg |
| 50 hg | 5 kg |
| 100 hg | 10 kg |
How to use
- Enter a value in the Hectograms field.
- The Kilograms figure appears immediately — no button to press.
- Typing in the Kilograms field converts back to Hectograms the same way.
- Use the reference table for the values that come up most often.
Hectograms to Kilograms formula
To convert hectograms to kilograms, multiply by 0.1.
kg = hg × 0.1
Put another way, one hectogram is exactly 1/10 of a kilogram.
Why this factor: the hectogram and the kilogram are both defined against the kilogram, so dividing one definition by the other gives 0.1 directly. Both definitions are set out in full below.
To go the other way, divide by 0.1 — or use the Kilograms to Hectograms converter, which is the same calculation reversed.
Worked example
Given 25 hg, multiplying by 0.1 yields 2.5 kg.
25 hg × 0.1 = 2.5 kg
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 kilogram?
The kilogram is the SI base unit of mass — the reference for every other mass unit.
Definition: Since 2019 the kilogram has been defined by fixing the Planck constant at exactly 6.62607015×10⁻³⁴ joule-seconds, retiring the physical platinum-iridium cylinder that defined it for 130 years.
Where it is used: Universal in science, trade and everyday weighing outside the United States.
Hectograms vs Kilograms
The hectogram is a metric unit while the kilogram is an SI unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many kilograms are in a hectogram?
One hectogram equals 0.1 kilograms.
What is the formula to convert hectograms to kilograms?
Multiply the number of hectograms by 0.1. To reverse it, divide by 0.1 instead.
How do I convert kilograms back to hectograms?
Divide by 0.1, which is the same as multiplying by 10.
How many kilograms are in 10 hectograms?
10 hg works out to 1 kg.
How is the hectogram defined?
Exactly 0.1 kilogram by SI prefix definition.