# Carats to Hectograms (ct to hg)

Source: https://www.unitconvertercalculator.com/weight/carats-to-hectograms/

**1 ct = 0.002 hg**

One carat equals exactly 0.002 hectograms. A hectogram is 100 grams, making it 500 times heavier than a single carat. The hectogram, like many intermediate metric units, sees limited everyday use but appears in Italian food labeling (the 'etto') and some European commercial contexts.

## Formula

Apply the conversion factor

## Conversion Table

| Carats (ct) | Hectograms (hg) |
|---|---|
| 1 ct | 0.002 hg |
| 5 ct | 0.01 hg |
| 10 ct | 0.02 hg |
| 50 ct | 0.1 hg |
| 100 ct | 0.2 hg |
| 250 ct | 0.5 hg |
| 500 ct | 1 hg |
| 1000 ct | 2 hg |
| 2500 ct | 5 hg |
| 5000 ct | 10 hg |
| 10000 ct | 20 hg |
| 25000 ct | 50 hg |
| 50000 ct | 100 hg |
| 100000 ct | 200 hg |

## Units

### Carat (ct)

A carat is a unit of mass equal to exactly 200 milligrams (0.2 grams), used for measuring gemstones and pearls. Adopted internationally in 1907 by the Fourth General Conference on Weights and Measures.

### Hectogram (hg)

A hectogram is 100 grams or one tenth of a kilogram. Used in Italy (as 'etto') for buying food at markets and delicatessens.

## Background

To accumulate one hectogram of diamond weight, you would need 500 carats of gems - a substantial collection worth millions of dollars. In Italian markets, an 'etto' (hectogram) of prosciutto is a common deli order. This conversion is most relevant in contexts where gemstone inventories measured in carats need to be reported in standard metric weight units for customs, insurance, or shipping documentation.

## Good to Know

The Italian 'etto' (hectogram) is so embedded in Italian food culture that many Italians do not realize other countries do not use the unit. A recipe calling for 'un etto di burro' (a hectogram of butter, 100 grams) is immediately understood in any Italian kitchen. The hectogram occupies a similar cultural niche to the Austrian dekagram - a metric sub-unit that survived in one country's daily commerce while disappearing from the rest of the world.

## FAQ

### How many hectograms are in one carat?

One carat equals exactly 0.002 hectograms. Since a carat is 0.2 grams and a hectogram is 100 grams, dividing 0.2 by 100 gives 0.002.

### What is a hectogram used for?

The hectogram (100 grams) is primarily used in Italian food commerce, where it is called an 'etto.' Italian delis and markets price many items per hectogram. Outside Italy, the hectogram is largely unused, with grams and kilograms preferred.

### How many carats make one hectogram?

Exactly 500 carats equal one hectogram (100 grams). This is because each carat is 0.2 grams, and 500 x 0.2 = 100 grams.

## Non-Frequently Asked Questions

### What would a hectogram of diamonds look like?

A hectogram is 500 carats. If composed of 1-carat round brilliant diamonds (about 6.5 mm each), you could tile an area roughly the size of a credit card. The pile would be small enough to fit in your palm but valuable enough to buy a house. Diamonds are remarkably dense for their size.

### Is the hectogram just an Italian thing?

Mostly, yes. Walk into a Roman salumeria and order 'due etti di mortadella' (200 grams of mortadella) and nobody blinks. Try ordering 'two hectograms of mortadella' in London or New York and you will receive confused stares. The hectogram is perfectly metric and perfectly Italian in its everyday usage.

### Could a jeweler fit 500 carats of gems in their pocket?

Easily. Five hundred 1-carat diamonds would weigh 100 grams - about the weight of a small apple. They would fit comfortably in a small pouch. The value, however, could exceed 2 million dollars, making that pocket the most expensive one in the room.

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## See Also

- [Hectograms to Carats](https://www.unitconvertercalculator.com/weight/hectograms-to-carats/)