Carats (ct) to Metric Tonnes (t) Converter
Enter a value to instantly convert between weight units.
1 Carat = 2.0000e-7 Metric Ton
Key Formulas
Kilogram → Pound
lb = kg × 2.20462Pound → Kilogram
kg = lb × 0.453592Gram → Ounce
oz = g × 0.035274Ounce → Gram
g = oz × 28.3495Formula
t = ct ÷ 5000000One carat is 0.2 grams, so 5 million carats equal 1 metric tonne. Large-scale diamond operations, jewelry manufacturers, and gemological institutes often need to convert between carat-level gemstone weights and tonne-level production or shipping totals.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A diamond mining company shipping 5 million carats of industrial diamond declares 1 tonne for customs.
5000000 ct = 1 t
A jewelry manufacturer using 1 million carats of small accent stones receives 0.2 tonnes of material.
1000000 ct = 0.2 t
A diamond wire saw producer ordering 2.5 million carats of powder needs to know it's 0.5 tonnes for the shipping quote.
2500000 ct = 0.5 t
A dental laboratory receiving 50,000 carats of diamond burs calculates 0.01 tonnes for the import documentation.
50000 ct = 0.01 t