Carat to Stone Converter
Convert carats to stones (ct to st) instantly with this free online weight converter. Enter any value in the Carat field and get the equivalent in Stone immediately. This converter handles any quantity — from tiny fractions to large numbers — with full precision. No signup, no ads in the widget, and the conversion runs entirely in your browser for instant results.
The conversion factor is exact: 1 ct = 3.149462465e-05 st. To convert carats to stones, multiply your Carat value by 3.149462465e-05. For example, 10 ct = 0.0003149462465 st. You can also reverse the calculation: 1 st = 31751.45 ct.
Quick conversion table
| Carat (ct) | Stone (st) |
|---|---|
| 1 ct | 3.149462465e-05 st |
| 5 ct | 0.0001574731233 st |
| 10 ct | 0.0003149462465 st |
| 25 ct | 0.0007873656164 st |
| 50 ct | 0.001574731233 st |
| 100 ct | 0.003149462465 st |
Use the swap button to reverse the direction, or choose a different unit from the dropdown menus to convert within the weight category.
Formula
Carat to Stone conversion: 1 ct = 3.149462465e-05 st stones = carats × 3.149462465e-05 1 st = 31751.45 ct carats = stones × 31751.45
Example
Example: Convert 10 ct to st: 10 ct × 3.149462465e-05 = 0.0003149462465 st So, 10 ct is about 0.0003149462465 st. To convert back, multiply by 31751.45: 0.0003149462465 st × 31751.45 = 10 ct.
How to Use
- Enter the value you want to convert in the Carat field
- The result in Stone appears instantly below
- Use the dropdown menus to change units if needed
- Click 'Swap Units' to reverse the conversion direction
- Copy the result or adjust the input for a new conversion
Frequently Asked Questions
How do I convert carats to stones?
Enter the value in Carat (ct) in the 'From' field. The equivalent in Stone (st) appears instantly in the 'To' field. The converter uses precise conversion factors and updates in real time as you type.
What is the formula to convert ct to st?
1 ct = 3.149462465e-05 st, so stones = carats × 3.149462465e-05. To convert back, 1 st = 31751.45 ct. The full formula and a worked example are shown on this page.
How many stones are in one Carat?
1 ct = 3.149462465e-05 st.
Is this Carat to Stone converter free?
Yes, completely free with no signup, no limits, and no ads in the converter widget. You can convert as many values as you need. The tool runs entirely in your browser, so your data never leaves your device.
Can I convert stones back to carats?
Yes. Click the 'Swap Units' button to reverse the direction. You can also use the dropdown menus to select any other weight unit for either field.
How accurate is the ct to st conversion?
The converter uses high-precision conversion factors (up to 8 decimal places). Results are displayed with up to 6 decimal places, with trailing zeros removed for readability. For scientific or engineering work, always verify with official standards.