Hectograms to Carats
An instant hectograms-to-carats converter, with the formula and a reference table below.
| Hectograms | Carats |
|---|---|
| 1 hg | 500 ct |
| 2 hg | 1000 ct |
| 3 hg | 1500 ct |
| 5 hg | 2500 ct |
| 10 hg | 5000 ct |
| 25 hg | 12500 ct |
| 50 hg | 25000 ct |
| 100 hg | 50000 ct |
How to use
- Enter a value in the Hectograms field.
- The Carats figure appears immediately — no button to press.
- Typing in the Carats field converts back to Hectograms the same way.
- Use the reference table for the values that come up most often.
Hectograms to Carats formula
To convert hectograms to carats, multiply by 500.
ct = hg × 500
Put another way, one hectogram is exactly 500 carats.
Why this factor: the hectogram and the carat are both defined against the kilogram, so dividing one definition by the other gives 500 directly. Both definitions are set out in full below.
To go the other way, divide by 500 — or use the Carats to Hectograms converter, which is the same calculation reversed.
Worked example
Take 150 hg and multiply by the factor 500: the result is 75000 ct.
150 hg × 500 = 75000 ct
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 carat?
A metric carat is the standard mass unit for gemstones.
Definition: Exactly 200 milligrams — that is, 0.2 gram — standardized internationally in 1907.
Where it is used: Diamond and gemstone weight throughout the jewellery trade.
Worth knowing: Do not confuse the carat (gemstone mass) with the karat (gold purity out of 24). A 1-carat diamond and 24-karat gold measure entirely different things.
Hectograms vs Carats
The hectogram is a metric unit while the carat is a specialized 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 carats are in a hectogram?
One hectogram equals 500 carats.
What is the formula to convert hectograms to carats?
Multiply the number of hectograms by 500. To reverse it, divide by 500 instead.
How do I convert carats back to hectograms?
Divide by 500, which is the same as multiplying by 0.002.
How many carats are in 10 hectograms?
10 hg works out to 5000 ct.
Is there anything to watch out for with carats?
Do not confuse the carat (gemstone mass) with the karat (gold purity out of 24). A 1-carat diamond and 24-karat gold measure entirely different things.
How is the hectogram defined?
Exactly 0.1 kilogram by SI prefix definition.