# Stone to pounds converter

> Convert stone to pounds (stone to lbs) with the exact factor, a conversion chart and worked steps.

Interactive version: https://www.calcopenly.com/conversion/stones-to-lbs
Subject: Unit converters

A body-weight record in stone sometimes includes an additional number of pounds. Decimal stone is a different notation: 11.5 stone means eleven and a half stone. Convert mixed stone-and-pound records to a single stone value before using this field.

One stone is exactly 14 pounds, so 11 st is 154 lb. To convert stone to lbs, multiply by 14; to convert back, multiply by 0.0714285714.

The stone is 14 pounds, exactly 6.35029318 kg. Because both units are defined exactly, the factor above is exact and the results here carry no conversion error.

## Inputs

- **Stone (st)**

## Results

- Pounds (lb) — main result
- Conversion
- 1 lb in stone (st)

## Formula

$$
\text{pounds} = \text{stone} \times 14
$$

## Worked examples

### 11 st to lb

- Stone (st): 11 st
- **Pounds: 154 lb**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 9 st to lb

- Stone (st): 9 st
- **Pounds: 126 lb**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 15 st to lb

- Stone (st): 15 st
- **Pounds: 210 lb**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

## Questions

### When would I convert stone to lbs?

A body-weight record in stone sometimes includes an additional number of pounds. Decimal stone is a different notation: 11.5 stone means eleven and a half stone. Convert mixed stone-and-pound records to a single stone value before using this field.

### How many pounds are in a stone?

One stone is exactly 14 pounds. The stone is 14 pounds, exactly 6.35029318 kg.

### How do you convert stone to lbs?

Multiply the number of stone by 14. For example, 11 st × 14 = 154 lb. To go the other way, divide by 14.

### How accurate is the stone to pounds converter?

Accuracy depends on your inputs and the method's assumptions. Decimal arithmetic uses 50 significant digits, but estimates, numerical methods and source data can be less precise; the displayed rounding does not remove those limits. It is checked against 3 worked examples whose answers come from independent sources; for example, “11 st to lb” is checked against Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions).

### Where does the method come from?

NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B; NIST Handbook 44, Appendix C: General tables of units of measurement; BIPM, The International System of Units (SI Brochure), 9th edition.

## Sources

- [NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44, Appendix C: General tables of units of measurement](https://www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/handbook-44)
- [BIPM, The International System of Units (SI Brochure), 9th edition](https://www.bipm.org/en/publications/si-brochure)