Carats ↔ Grams Converter

Convert between carats and grams instantly

Carats (ct)

Enter carats value to convert to grams

Grams (g)

Enter grams value to convert to carats

Conversion Result

5 carats = 1 gram

1.00 gram • 0.035 ounces • 0.001 kilograms

📚 Carats ↔ Grams Conversion Details

Carats to Grams Formula

grams = carats ÷ 5

To convert carats to grams, divide the carats by 5.

Grams to Carats Formula

carats = grams × 5

To convert grams to carats, multiply the grams by 5.

Bidirectional Conversion

This converter works both ways simultaneously:

Type in carats → grams updates automatically
Type in grams → carats updates automatically
No buttons to click - works as you type

Common Uses

Diamond and gemstone weight
Jewelry making and design
Precious metal measurement
Pearl weight measurement

⚖️ How This Converter Works

This is a bidirectional converter that works in real-time:

Carats → Grams: When you type in the carats field, the grams field automatically updates
Grams → Carats: When you type in the grams field, the carats field automatically updates
No swapping needed: Both conversions happen simultaneously
Real-time: Updates happen as you type, no button clicks required

// Bidirectional Conversion Logic:
grams = carats ÷ 5
carats = grams × 5

// Example 1: Type "25" in carats
grams = 25 ÷ 5 = 5

// Example 2: Type "2" in grams
carats = 2 × 5 = 10

📊 Conversion Table

Carats (ct)	Grams (g)	Milligrams (mg)
1 ct	0.20 g	200 mg
5 ct	1.00 g	1000 mg
10 ct	2.00 g	2000 mg
50 ct	10.00 g	10000 mg
100 ct	20.00 g	20000 mg
500 ct	100.00 g	100000 mg

💎 About Carats

A carat (ct) is a unit of mass equal to 200 milligrams (0.2 grams) and is used for measuring gemstones and pearls. The carat is divided into 100 points of 2 milligrams each.

Important distinction: The carat used for gemstones (metric carat) is different from the karat used for gold purity (which measures purity, not weight).

Key Facts:

1 carat = 200 milligrams = 0.2 grams
1 gram = 5 carats
The carat is standardized internationally since 1907
Used primarily for diamonds and other gemstones

❓ Frequently Asked Questions

Q: How many grams are in one carat?

A: One carat equals 0.2 grams (200 milligrams).

Q: Is carat the same as karat?

A: No, carat (ct) measures gemstone weight, while karat (K or kt) measures gold purity (24K = pure gold).

Q: How many carats are in a gram?

A: There are 5 carats in one gram.

Q: Why are diamonds measured in carats?

A: Carats provide a precise measurement for valuable gemstones, allowing for standardized valuation and comparison.