Pound To Stone Converter

Verified by the ConvertReference Technical Standards Team

ConvertReference Technical Standards Team

All values and formulas are validated through our editorial review process and cross-checked against internationally recognized reference standards (NIST, BIPM, CODATA).

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Last reviewed: December 07, 2025

Conversion Factors

1 pound = 0.0714285714285714 stone
1 stone = 14 pound

(Exact factors: 0.0714285714285714 and 14)

Sources: NIST · BIPM

About This Pound And Stone Converter

Welcome to our quick pounds and stones tool. Type your value in pounds to see the result in stones. Use the swap button to switch between pounds and stones. Everything is fast, simple, and easy to use.

What Are Pounds And Stones?

What Is A Pound?

Pound (mass), symbol lb. The avoirdupois pound is a unit of mass used in the Imperial and US customary systems. It is defined exactly as 0.45359237 kilograms. Common abbreviations: lb, lbs. Example: a loaf of bread weighs about 1 lb (≈0.45 kg).

What Is A Stone?

Stone (st) is a unit of mass used mainly in the UK and Ireland. It equals 14 pounds avoirdupois, exactly 6.35029318 kilograms. It belongs to the British imperial system. Real-world example: a person weighing about 70 kg is roughly 11 stone (70 ÷ 6.35029 ≈ 11.0).

When To Use Pound Vs Stone

Pound Usage

Pounds (lb) are a customary unit of mass used in the United States, the United Kingdom, Canada, and Liberia. In these countries, everyday quantities such as body weight and consumer measures are commonly expressed in pounds rather than kilograms.

Stone Usage

Stone is used in construction, cladding, paving, landscaping, sculpture, and monuments across many regions. It is utilized in India, Italy, the United States, and Spain for building projects, restorations, and decorative applications, reflecting its durability, variety, and versatility.

How To Convert Between Pounds And Stones

Conversion Formulas

Pound to Stone:
pound × 0.0714285714285714 = stone

Stone to Pound:
stone × 14 = pound

Step-by-Step Guide

Pound to Stone

Take your value in pounds.
Multiply by 0.0714285714285714.
The result is in stones.

Stone to Pound

Take your value in stones.
Multiply by 14.
The result is in pounds.

Example: Convert 0.00585648 pounds to stones.

Exact: 0.00585648 × 0.0714285714285714 = 0.000418320184671859 stones.
Rounded: approximately 0.00041832 stones.

Example: Convert 5 stones to pounds.

Exact: 5 × 14 = 70 pounds.

History & Context

Pound and stone are old weight units used in Britain. The pound came from a Roman word libra and became a common weight for goods and money. In medieval England, traders used agreed weights and rules to keep a standard pound. The stone grew beside it as a larger weight used mainly for people and animals in Britain and Ireland. Over time these units joined the growing system used in the empire and stayed in use as new measuring rules arrived. Today the pound and the stone are still familiar in the UK for body weight and some trades.

Practical Use

In a UK fitness app, someone might weigh 180 pounds and want to convert pounds to stone to display their weight as about 12 stone 12 pounds. Similarly, someone might have 5 stone 6 pounds and need to convert that to 76 pounds for dosing or charting. These conversions help keep weight information in familiar formats while ensuring accuracy across contexts.

Common Mistakes When Converting Between Pounds And Stones

Treating pounds and stones as the same unit.
Assuming there is a simple direct conversion between pounds and stones.
Forgetting that a stone is a larger unit and misinterpreting the value when expressed in stones.
Converting in the wrong direction by using the stones to pounds rule when you need pounds to stones.

Mental Shortcuts For Quick Conversions

Pound to stone: 14 pounds = 1 stone - divide by 14 for a quick estimate. Stone to pound: 1 stone = 14 pounds - multiply by 14 for a quick estimate. Note: this is for estimation only; use a precise converter for exact results in most situations.

Pounds And Stones Conversion Graph

Conversion Table For Pound And Stone

Common conversion values
Pounds	Stones
0.0011713	0.000083664
0.00585648	0.00041832
0.011713	0.00083664
0.0234259	0.00167328
0.0585648	0.0041832
0.11713	0.0083664
0.234259	0.0167328
0.585648	0.041832
1.1713	0.083664
2.34259	0.167328
5.85648	0.41832

Values are rounded for display; internal calculations use the exact conversion factors between pound and stone (0.0714285714285714 and 14).

Dataset & API Access

Programmatic Access

Free JSON API with stable endpoints and predictable keys for automated bidirectional conversions.

Endpoint: https://convertreference.org/api/v1/convert/pound-to-stone.json

Content Type: application/json

Documentation: View API docs

Licensing

License: CC0 1.0 Universal (Public Domain)

See all datasets

Data & Editorial Process

All numerical values and formulas are generated from the Pint scientific unit library (v0.25), using constants consistent with the BIPM SI Brochure (9th Edition) and NIST Special Publication 811. Explanatory text is drafted with AI assistance and reviewed by ConvertReference editors for clarity and accuracy. This converter is completely free to use, and all calculations are performed locally in your browser and never sent to a server.

2025-12-07 – Generated: Page created using Pint v0.25 verified constants.
2025-12-07 – Reviewed: Verified by ConvertReference editors; no numerical changes required.

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