Metric Tonnes (t) to Carats (ct) Converter
Enter a value to instantly convert between weight units.
1 Metric Ton = 5000000 Carat
Key Formulas
Kilogram → Pound
lb = kg × 2.20462Pound → Kilogram
kg = lb × 0.453592Gram → Ounce
oz = g × 0.035274Ounce → Gram
g = oz × 28.3495Formula
ct = t × 5000000A carat is 0.2 grams, and a tonne is 1,000,000 grams, so one tonne equals 5 million carats. While gemstones are typically measured in carats, industrial diamond tools, diamond drill bits, and other diamond-impregnated products are sometimes measured in kilogram or tonne quantities where carat totals become very large.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A diamond mining company reporting 1 tonne of industrial diamond grit for the annual production report — 5 million carats.
1 t = 5000000 ct
A jewelry manufacturer using 0.5 tonnes of melee diamonds (small accent stones) records 2.5 million carats.
0.5 t = 2500000 ct
A dental lab using 1 kg of diamond burs converts to 5000 carats for the supply order.
0.001 t = 5000 ct
A diamond wire saw manufacturer ordering 10 tonnes of diamond powder reports 50 million carats for the contract.
10 t = 50000000 ct