Carat to Gram Conversion Calculator: Free Online Tool
Convert carats to grams with our free online weight converter.
Carat to Gram Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Carat).
- The converted value in Gram will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Weight category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Carat to Gram
Converting Carat to Gram involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Carat = 0.2 gramsExample Calculation:
Convert 5 carats: 5 × 0.2 = 1 grams
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
What is a Carat and a Gram?
The carat is a unit of mass used for measuring gemstones and pearls. It is defined as exactly 200 milligrams (0.2 grams).
The gram is a unit of mass in the metric system. Originally defined as the mass of one cubic centimeter of water at its maximum density, it is now defined as 1/1000 of a kilogram.
Note: The Carat is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Gram belongs to the metric (SI) system.
History of the Carat and Gram
The term "carat" comes from the carob seed ("keration" in Greek), which was historically used as a standard for weighing small quantities due to its perceived uniform weight. The metric carat of 200 mg was adopted internationally in 1907.
Introduced in France after the French Revolution as part of the metric system. It became a fundamental unit for scientific measurement.
Common Uses for carats and grams
Explore the typical applications for both Carat (imperial/US) and Gram (metric) to understand their common contexts.
Common Uses for carats
- Jewelry Industry: The primary unit for weighing diamonds and other precious gemstones.
- Pearls: Used for weighing pearls.
- Note: This is distinct from "karat," which measures the purity of gold.
Common Uses for grams
- Cooking & Baking: Standard unit worldwide for measuring dry ingredients like flour, sugar, spices, and non-liquid items like butter.
- Groceries: Used for labeling the net weight of many packaged food products (e.g., cereal boxes, canned goods, snacks).
- Science: Common unit for mass measurements in chemistry labs, biology, and physics experiments.
- Jewelry & Precious Metals: Often used to measure the weight of gold, silver, and gemstones.
- Postal Services: Used globally for determining the weight and cost of letters and small parcels.
Frequently Asked Questions
Questions About Carat (ct)
How many milligrams are in a carat?
There are exactly 200 milligrams (mg) in 1 carat (ct).
How many grams are in a carat?
There are 0.2 grams (g) in 1 carat (ct).
Is carat the same as karat?
No. Carat (ct) measures mass (weight) for gemstones, while Karat (K or kt) measures the purity of gold (e.g., 24K gold is pure gold).
About Gram (g)
Is the gram part of the metric system?
Yes, the gram (g) is a fundamental unit of mass in the metric system, equivalent to 1/1000 of a kilogram.
What is a gram commonly used for?
It's widely used for measuring small masses, especially in cooking, groceries, science labs, and for weighing precious metals.
How many grams are in a kilogram?
There are exactly 1000 grams (g) in 1 kilogram (kg).
Conversion Table: Carat to Gram
| Carat (ct) | Gram (g) |
|---|---|
| 1 | 0.2 |
| 5 | 1 |
| 10 | 2 |
| 25 | 5 |
| 50 | 10 |
| 100 | 20 |
| 500 | 100 |
| 1,000 | 200 |
All Weight Conversions
Other Units from Weight
- Kilogram (kg)
- Milligram (mg)
- Pound (lb)
- Ounce (oz)
- Stone (st)
- Ton (metric) (t)
- Ton (US) (ton)
- Ton (UK) (long ton)
- Microgram (µg)
- Slug (sl)
- Troy Ounce (oz t)
- Pennyweight (dwt)
- Grain (gr)
- Dram (dr)
- Quintal (q)
- Atomic Mass Unit (u)
- Pavan (India) (pavan)
- Kati (India) (kati)
- Masha (India) (masha)
- Dina (India) (dina)
- Pras (India) (pras)
- Lota (India) (lota)