About this tool

Carat to Grain Converter

Convert carats to grains instantly. Free, bidirectional, and fully in-browser.

1 carat equals 3.086471671 grains — enter any carat value to convert it to grains instantly. This Carat to Grain converter is a client-side tool: it applies a single multiplication (gr = ct × 3.086471671) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert grains back to carats. A reference table lists common carat values already converted, and nothing you enter is sent to a server.

How to use Carat to Grain Converter

1. 1

   Open Carat to Grain Converter on AltFTool — it loads instantly in your browser.

2. 2

   Type the value you want to convert into the Carat field.

3. 3

   Read the equivalent in grains in the result field, and copy it if needed.

4. 4

   Use the decimal-places slider for more or less precision, or press swap to convert grains to carats.

Why use Carat to Grain Converter

• Instant, both ways

  The result updates as you type, and the swap button flips the conversion to grain → carat without reloading.

• Exact Mass math

  The conversion uses the precise factor (gr = ct × 3.086471671), so the number matches a manual calculation to the decimal places you choose.

• Adjustable precision

  A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.

• Private and free

  Everything runs locally in your browser — no upload, no account, no limit on conversions.

Common use cases

• Converting a carat measurement to grains for a spec, listing, or report.
• Checking carat↔grain figures while comparing products, datasets, or documentation.
• Learning the carat-to-grain relationship from the worked formula and the common-value table.

Frequently asked questions