Carat to Kilogram Conversion Calculator: Free Online Tool
Convert carats to kilograms with our free online weight converter.
Carat to Kilogram Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Carat).
- The converted value in Kilogram 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 Kilogram
Converting Carat to Kilogram involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Carat = 0.0002 kilogramsExample Calculation:
Convert 5 carats: 5 × 0.0002 = 0.001 kilograms
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 Kilogram?
The carat is a unit of mass used for measuring gemstones and pearls. It is defined as exactly 200 milligrams (0.2 grams).
The kilogram is the base unit of mass in the International System of Units (SI). It is defined based on the fixed numerical value of the Planck constant.
Note: The Carat is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Kilogram belongs to the metric (SI) system.
History of the Carat and Kilogram
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.
Originally defined as the mass of one liter of water. Later, it was represented by the International Prototype of the Kilogram (IPK), a platinum-iridium cylinder. In 2019, the definition was changed to be based on fundamental physical constants.
Common Uses for carats and kilograms
Explore the typical applications for both Carat (imperial/US) and Kilogram (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 kilograms
- Global Standard: The primary unit for mass in science (physics, chemistry), engineering calculations, and international trade (e.g., commodity pricing).
- Body Weight: Widely used worldwide (outside the US/UK primarily) for measuring human body weight for health and fitness tracking.
- Food & Groceries: Used for selling and labeling larger quantities of food items like rice, flour, sugar, and some produce in metric countries.
- Shipping & Logistics: Standard unit for calculating weights of packages and freight internationally.
- Everyday Objects: Measuring the mass of common items like furniture, electronics, or luggage.
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 Kilogram (kg)
What is the base unit of mass in the SI system?
The kilogram (kg) is the base unit of mass in the International System of Units (SI).
Is the kilogram used worldwide?
Yes, it's the global standard for science, engineering, and international trade, and widely used for everyday measurements in most countries.
How was the kilogram originally defined?
It was initially defined as the mass of one liter of water, later represented by a physical artifact (the IPK), and is now based on the Planck constant.
Conversion Table: Carat to Kilogram
| Carat (ct) | Kilogram (kg) |
|---|---|
| 1 | 0 |
| 5 | 0.001 |
| 10 | 0.002 |
| 25 | 0.005 |
| 50 | 0.01 |
| 100 | 0.02 |
| 500 | 0.1 |
| 1,000 | 0.2 |
All Weight Conversions
Other Units from Weight
- Gram (g)
- 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)