Gram per Cubic inch (g/in3) expresses mass in gram per unit volume in cubic inch, found by dividing a mass value by a volume value.
Gram per Cubic inch to Carat per Cubic Millimeter
Convert gram per cubic inch (g/in3) to carat per cubic millimeter (ct/mm3) instantly with formula, conversion table, and FAQ.
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Convert gram per cubic inch (g/in3) to carat per cubic millimeter (ct/mm3) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
Carat per Cubic Millimeter (ct/mm3) expresses mass in carat per unit volume in cubic millimeter, found by dividing a mass value by a volume value.
ct/mm3 = g/in3 × 0.000305
Results update instantly for Gram per Cubic inch to Carat per Cubic Millimeter conversions.
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Formula
ct/mm3 = g/in3 × 0.000305
g/in3 = ct/mm3 × 3277.4128
Conversion table
| 1 g/in3 | 0.000305 ct/mm3 |
| 5 g/in3 | 0.001526 ct/mm3 |
| 10 g/in3 | 0.003051 ct/mm3 |
| 20 g/in3 | 0.006102 ct/mm3 |
| 50 g/in3 | 0.015256 ct/mm3 |
| 100 g/in3 | 0.030512 ct/mm3 |
| 500 g/in3 | 0.152559 ct/mm3 |
| 1000 g/in3 | 0.305119 ct/mm3 |
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How the formula works
Both gram per cubic inch and carat per cubic millimeter measure the same physical quantity (mass per unit volume), so converting between them is a single multiplication. Multiply a value in gram per cubic inch by 0.000305 to get carat per cubic millimeter. To reverse the conversion, multiply a carat per cubic millimeter value by 3277.4128 to get back to gram per cubic inch.
Frequently asked questions
What is Gram per Cubic inch (g/in3)?
Gram per Cubic inch (g/in3) expresses mass in gram per unit volume in cubic inch, found by dividing a mass value by a volume value.
What is Carat per Cubic Millimeter (ct/mm3)?
Carat per Cubic Millimeter (ct/mm3) expresses mass in carat per unit volume in cubic millimeter, found by dividing a mass value by a volume value.
How do I convert gram per cubic inch to carat per cubic millimeter?
Multiply the gram per cubic inch value by 0.000305 to get the equivalent in carat per cubic millimeter. For example, 5 g/in3 × 0.000305 = 0.001526 ct/mm3.
Is this conversion exact?
Yes. Both units are defined using fixed metric and imperial conversion constants, so the factor 0.000305 is an exact, non-rounded value.
Can I convert carat per cubic millimeter back to gram per cubic inch?
Yes. Divide the carat per cubic millimeter value by 0.000305, or multiply it by 3277.4128, to get gram per cubic inch.
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About converting gram per cubic inch to carat per cubic millimeter
Gram per Cubic inch (g/in3) expresses mass in gram per unit volume in cubic inch, found by dividing a mass value by a volume value. Carat per Cubic Millimeter (ct/mm3) expresses mass in carat per unit volume in cubic millimeter, found by dividing a mass value by a volume value.
Use this calculator to move between gram per cubic inch and carat per cubic millimeter accurately for science, engineering, manufacturing, or everyday density calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.