---
title: "Stone to Carats — st to ct converter"
description: "1 stone = 31,751.466 carats. Convert stone to carats with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/stone-to-carats/
site: "At One Place"
---

# Stone to carats

**1 stone in carats: 1 st = 31,751.466 ct**

ct = st × 31,751.4659

To convert stone to carats, multiply by 31,751.4659. The table below gives the values people look up most often, and the converter works for any number.

## Stone to carats table

*Common stone values converted to carats.*

| Stone | Carats |
| --- | --- |
| 1 st | 31,751.466 |
| 2 st | 63,502.932 |
| 3 st | 95,254.398 |
| 4 st | 127,005.86 |
| 5 st | 158,757.33 |
| 10 st | 317,514.66 |
| 15 st | 476,271.99 |
| 20 st | 635,029.32 |
| 25 st | 793,786.65 |
| 30 st | 952,543.98 |
| 40 st | 1,270,058.6 |
| 50 st | 1,587,573.3 |
| 75 st | 2,381,359.9 |
| 100 st | 3,175,146.6 |
| 250 st | 7,937,866.5 |
| 500 st | 15,875,733 |
| 1,000 st | 31,751,466 |

## How the conversion works

The relationship is ct = st × 31,751.4659. Both units measure mass, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

## Common questions

### How many carats are in one stone?

One stone equals 31,751.466 carats. ct = st × 31,751.4659.

### How do you convert stone to carats?

Use ct = st × 31,751.4659. So 10 st is 317,514.66 ct.

### How many stone are in one carat?

One carat equals 0.00003149 stone, which is the reverse of the conversion above.

## Related pages

- [Carats to Stone](https://atoneplace.net/convert/carats-to-stone/)
- [Stone to Kilograms](https://atoneplace.net/convert/stone-to-kg/)
- [Stone to Grams](https://atoneplace.net/convert/stone-to-grams/)
- [Stone to Milligrams](https://atoneplace.net/convert/stone-to-mg/)
- [Stone to Tonnes](https://atoneplace.net/convert/stone-to-tonnes/)
- [Stone to Pounds](https://atoneplace.net/convert/stone-to-lbs/)
- [Stone to Ounces](https://atoneplace.net/convert/stone-to-oz/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)