Carats to Grams
A carat is 200 milligrams, the standard unit for weighing gemstones and pearls worldwide. A gram is one thousandth of a kilogram, used for cooking ingredients and other small everyday objects. 1 ct equals 0.2 g, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to mass, measured here against mass's base unit (kg) — every other mass unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
g = ct × 0.2
ct = g × 5
Worked example: 5 ct × 0.2 = 1 g.
Conversion table
| Carat (ct) | Gram (g) |
|---|---|
| 1 ct | 0.2 g |
| 2 ct | 0.4 g |
| 3 ct | 0.6 g |
| 5 ct | 1 g |
| 10 ct | 2 g |
| 20 ct | 4 g |
| 25 ct | 5 g |
| 50 ct | 10 g |
| 100 ct | 20 g |
| 250 ct | 50 g |
| 500 ct | 100 g |
| 1,000 ct | 200 g |
Frequently asked
- How many Grams in a carat?
- 1 ct equals 0.2 g.
- How do I convert Carats to Grams?
- Multiply the value in ct by 0.2 to get g. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Carat and Gram are both defined by a fixed conversion factor to mass's base unit (kg), so the result shown is exact to the precision displayed, not an approximation.