Carats to Stone Converter
Convert carats (ct) to stone (st) instantly. Weight units matter at the wet market, where older stalls and Chinese medical halls still quote prices per kati or tael, and when following American recipes in ounces and pounds.
Result
- Stone
- 3.149461e-5 st
How to use the carats to stone converter
- Enter the carats (ct).
- The results update as you type, or press Calculate.
- Read the stone first, then the supporting figures below it.
Formula
Stone = carats × 3.149461e-05
Worked example
For example, with these inputs:
- Carats (ct): 1
the calculator returns:
- Stone: 3.149461e-5 st
Carats to Stone table
| Carats | Stone |
|---|---|
| 1 ct | 3.149461e-5 st |
| 2 ct | 6.298922e-5 st |
| 5 ct | 0.000157 st |
| 10 ct | 0.000315 st |
| 20 ct | 0.00063 st |
| 25 ct | 0.000787 st |
| 50 ct | 0.001575 st |
| 100 ct | 0.003149 st |
| 250 ct | 0.007874 st |
| 500 ct | 0.015747 st |
| 1,000 ct | 0.031495 st |
About this conversion
Weight units matter at the wet market, where older stalls and Chinese medical halls still quote prices per kati or tael, and when following American recipes in ounces and pounds.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Frequently asked questions
How many stone are in one carat?
1 ct = 3.149461e-5 st.
How do I convert ct to st?
Stone = carats × 3.149461e-05.