Grain to Carat Converter (and vice versa)
Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026
This converter allows you to convert grains [gr.] to carats [ct] or carats [ct] to grains [gr.]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.
Convert grains to carats
There are two simple ways to convert grains [gr.] to carats [ct]. In the first calculation method, the value in grains [gr.] is divided by the rounded conversion factor of 3.0865. The second method multiplies the value in grains [gr.] by the rounded conversion factor of 0.324.
- Carats [ct] ≈ grains [gr.] ÷ 3.0865
- Carats [ct] ≈ grains [gr.] * 0.324
However, rounded conversion values are only suitable for rough conversions, as rounding errors can occur in the calculation result. The most accurate conversion of grains [gr.] to carats [ct] can be achieved using the following calculation method.
- Carats [ct] = grains [gr.] * 0.06479891 ÷ 109
Convert carats to grains
Converting carats [ct] to grains [gr.] is easy and can be done in two ways. The first method involves multiplication, in which the value in carats [ct] is multiplied by the rounded conversion factor of 3.0865. The second variant is a division. Here, the value in carats [ct] is divided by the rounded conversion factor of 0.324.
- Grains [gr.] ≈ carats [ct] * 3.0865
- Grains [gr.] ≈ carats [ct] ÷ 0.324
However, rounded conversion values do not allow for exact calculations because rounding errors can occur in the calculation result. The most accurate conversion of carats [ct] to grains [gr.] can be achieved using the following calculation method.
- Grains [gr.] = carats [ct] ÷ 0.06479891 * 109
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