Updated May 16, 2026

Kilograms to Carats Converter

Multiply kilograms by 5,000 to get carats. 1 kg = 5,000 carats. For example, 0.5 kg = 2,500 ct and 0.1 kg = 500 ct.

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Common Conversions

Key Takeaways

  • 1 kg = 5,000 carats exactly. Multiply kilograms by 5,000.
  • 0.2 kg = 1,000 carats.
  • 0.001 kg (1 gram) = 5 carats.
  • Rough gemstone lots are often priced per kilogram.
  • Industrial diamond abrasives ship in multi-kilogram quantities.

How Do You Convert Kilograms to Carats?

Multiply kilograms by 5,000 to get carats. The formula is: Carats = Kilograms x 5,000. One kilogram equals 1,000 grams, and each gram equals 5 carats, giving 5,000 carats per kilogram.

Coach Rivera buys crystal trophies for end-of-season awards. The supplier quotes 1.2 kg of crystal blanks. Converting: 1.2 x 5,000 = 6,000 carats of crystal material. Each trophy uses about 500 carats (100 g), so 1.2 kg is enough for 12 trophies with material to spare.

Bulk Weight Reference

Kilograms Carats Context
0.001 kg5 ctOne gram (single large gem)
0.01 kg50 ctSmall gem parcel
0.1 kg500 ctDealer lot
0.5 kg2,500 ctWholesale parcel
1 kg5,000 ctLarge wholesale lot
5 kg25,000 ctSmall mine weekly output
10 kg50,000 ctIndustrial diamond order
100 kg500,000 ctMajor mining operation

Practical Applications

Mining Operations

Tom Brewer researches diamond mining economics. A typical kimberlite mine processes 3 million tons of ore to recover about 5 kg of diamonds = 25,000 carats. Of those, only 7,500 carats (1.5 kg) are gem quality. The remaining 17,500 carats (3.5 kg) go to industrial use. He calculates the yield: about 1.67 carats per 1,000 tons of earth moved.

Wholesale Gem Trading

Sam Okafor sources stones for a jewelry designer. A rough sapphire lot is offered at $800 per kilogram. He buys 0.8 kg = 4,000 carats of rough material. After cutting (40% weight retention), he expects about 1,600 carats of finished stones = 0.32 kg. His effective cost per finished carat is $400 total / 1,600 = $0.50 per carat for commercial-grade sapphires.

Industrial Abrasives

Dana Kowalski orders diamond-coated cutting discs. Each disc contains 0.004 kg = 20 carats of synthetic industrial diamond embedded in the cutting edge. She orders 25 discs requiring 0.1 kg = 500 carats of diamond total. Synthetic industrial diamonds cost about $1 per carat versus $3,000-$10,000 per carat for natural gem-quality stones.


Related Calculators

Frequently Asked Questions

How many carats is 1 kilogram?

One kilogram equals exactly 5,000 carats. Since 1 carat is defined as 0.2 grams and 1 kilogram = 1,000 grams, the ratio is 1,000 / 0.2 = 5,000.

How do I convert kilograms to carats?

Multiply kilograms by 5,000 to get carats. For example, 0.5 kg = 2,500 ct, 2 kg = 10,000 ct, and 0.1 kg = 500 ct.

How heavy is the largest diamond in kilograms?

The largest rough diamond ever found (the Cullinan) weighed 3,106.75 carats = 0.6214 kilograms. The largest polished diamond (the Golden Jubilee) weighs 545.67 carats = 0.1091 kilograms.

How many individual diamonds are in 1 kilogram?

It depends on stone size. At 1 carat each, 1 kg contains 5,000 diamonds. At 0.1 carat (10 points) each, 1 kg contains 50,000 small diamonds. Industrial diamond grit in 1 kg could be millions of tiny particles.

Are gemstones ever sold by the kilogram?

Rough gemstones, industrial diamonds, and lower-quality stones are commonly sold by the kilogram. Gem-quality finished stones are always sold by the carat because individual quality assessment determines their value.