Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Stone to Pounds
Convert st to lb instantly, then review the formula, assumptions, and rounding guidance.
Weight & massInstant result
Decimals
Formula result = input × 6.35029318 ÷ 0.45359237. 1 st = 14 lb
Common examples
One value, several units
Kilograms6.3503 kg
Grams6,350.2932 g
Milligrams6,350,293.18 mg
Metric tonnes0.0064 t
Pounds14 lb
Ounces224 oz
Conversion table
| st | lb |
|---|---|
| 1 st | 14 lb |
| 2 st | 28 lb |
| 5 st | 70 lb |
| 10 st | 140 lb |
| 25 st | 350 lb |
| 50 st | 700 lb |
| 100 st | 1,400 lb |
Conversion chart
1 st14 lb
5 st70 lb
10 st140 lb
25 st350 lb
50 st700 lb
Worked example
1 kilogram equals 2.20462 pounds.
Unit definition
Stone (st) One stone equals 6.35029318 kilogram.
Unit history
Stone is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert st to kilogram.
3. Convert the base value to lb and apply your display precision.
Understand the result before using it
Stone to Pounds converts a value measured in Stone (st) into the equivalent value in Pounds (lb). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 6.35029318 ÷ 0.45359237
Assumptions
- Stone and Pounds represent the same weight & mass quantity.
- The input is expressed in st; the output is expressed in lb.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 st = 14 lb. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a st measurement in a document that expects lb.
- Compare a stone value with a value reported in pounds.
- Check the st-to-lb arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Everyday language often says weight, but these units represent mass. Force requires a local gravitational acceleration.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Stone to Pounds?
result = input × 6.35029318 ÷ 0.45359237 Using the displayed relationship, 1 st equals 14 lb.
How many Pounds are in one Stone?
One Stone is 14 Pounds. The displayed digits may be rounded.
Can I reverse the st to lb conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts lb back to st.
Is the Stone to Pounds result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.