How to Determine Your Weight in Stones

About the Author

Abby Campbell, BSc, SFN, SSN, CPT, is a leading professional fitness and nutrition expert, researcher, and published author of One Size Does NOT Fit All Diet Plan, one of Amazon's Top Gluten-Free and Weight Loss Diets. (You may read more about Abby at the bottom of this article.)

A stone measure equates to 14 pounds.
A stone measure equates to 14 pounds. | Source

Ways to Measure Weight Include Stoning

Weight in stones? We're obviously not talking about throwing rocks at someone who sinned greatly like the adulteress in Bible times! However, the use of stones to measure weight does come from times of antiquity. You may even find it amusing that the system was used up until the mid 19th century in the northwestern part of Europe and continue to some extent today.

The use of stones to measure weight dates back as far as the Hebrew Law where "large and small" stones were used. Though there was no "standard" stone in Jewish times, Roman Times did bring some standard with stones being crafted of certain weight. Northwestern European countries like Ireland and those that form the United Kingdom formerly used stones for trade purposes until the 1800s. Most items such as wool, wax, sugar, spice, and beef generally weighed anywhere from five to 40 pounds, or three to five kilograms, though stones were used to measure these items.

When the metric system was introduced in the mid 19th century, the "kilogram" replaced the stone measuring system. Due to the Weights and Measures Act of 1985, the measurement of stones was prohibited for trade in Ireland and the United Kingdom.

Though prohibition of stones was replaced by the metric system, some populations in Ireland and the United Kingdom still use this ancient system in determining weight. Through social media, you may have friends or acquaintances from these areas of the world. They may even refer to their weight in stones:

"I weigh 10 stones."

"I have lost three stones in six months!"

"I want to lose 5.3 stones in 10 months."

What do your friends mean when they speak this way? Continue reading as you will learn pounds conversion as well as kilogram conversions in determining your own stone weight.

Countries Who May Still Use the Stone Measure

show route and directions
A markerGreat Britain -
United Kingdom
[get directions]

B markerIreland -
Ireland
[get directions]

Stone measures are from the ancient of days!
Stone measures are from the ancient of days! | Source

Stones: Pounds Conversion

How many pounds equate to a stone? That would be 14. To convert a pound weight to a stone weight, use the following instructions:

  1. Find the weight in pounds.
  2. Divide pounds by 14.
  3. The sum equals weight in stones.

Example #1:

  1. 150 pounds
  2. 150 pounds ÷ 14
  3. Sum = 10.714285 stones

Example #2

  1. 210 pounds
  2. 210 pounds ÷ 14
  3. Sum = 15 stones

Example #3

  1. 125 pounds
  2. 125 pounds ÷ 14
  3. Sum = 8.9285714


Examples #1 and #3 have sums with decimals or fractions. Just round up or down to the 1/100th place. The correct way to state your stone weight for these examples are as follows:

  • Example #1: 10.714285 stones = 10.71 stones
  • Example #3: 8.9285714 = 8.93 stones

Some populations who use stones for body weight measurement will describe these numerals with decimals/fractions as "stones and pounds." The pounds determine the decimal or fraction portions of the sums. However, to determine the correct pounds for the decimals/fractions, you must convert it properly first. Following is the formula for conversion:

  • 14 x [0.XX] = pounds

Let's use Examples #1 to determine the stones and pounds for the sums. We will round up or down to a whole number for pounds.

  • Example #1: 10.714285 stones -or- 10.71 stones
  • 14 x 0.71 = 9.94 pounds = 10 pounds (rounded up to a whole number)

Now you may read 10.71 stones as "10 stones and 10 pounds." After converting 8.93 stones properly in Example #3, it can be read "8 pounds and 15 pounds."

Current times measure body weight in pounds or kilograms.
Current times measure body weight in pounds or kilograms. | Source

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Stones: Kilogram Conversion

If you normally use kilograms to measure body weight, then you will need to use a different formula than the one given above for pounds. Following is your conversion method:

  1. Find the weight in kilograms.
  2. Multiply kilograms by 0.157473044
  3. The sum equals weight in stones.

Example #1:

  1. 58 kilograms
  2. 58 kilograms x 0.157473044
  3. Sum = 10.708166992 stones -or- 10.71 stones

Example #2

  1. 91 pounds
  2. 91 pounds x 0.157473044
  3. Sum = 14.330047004 stones -or- 14.33 stones


To determine the decimal or fraction portion of stones into pounds, please see instructions in previous section.

Conclusion

Though you may never use the stone age method of stoning to track your body weight, it can be useful in gauging where your friends are, especially when speaking of their own weights. Now that you know how to determine your weight in stones by the long method or weight conversion calculators, you can also relate better to them by speaking their weight language.

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Helping those who desire it!
Helping those who desire it! | Source

About the author

Abby Campbell, BSc, SFN, SSN, CPT, is a leading professional fitness and nutrition expert, researcher, and published author. For the past 10 years, she has coached thousands of women locally and online to lose body fat and lead healthy lifestyles. Her clients have lost thousands of pounds, reclaimed health, and call her “Coach No Gimmick.” She is from Northern Virginia but now resides near Charlotte, North Carolina. Abby has been married for 20 years and has three grown daughters, one of which is autistic. She is a 19 year cancer survivor.

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Comments 4 comments

Kathryn Stratford profile image

Kathryn Stratford 3 years ago from Manchester, Connecticut

Very interesting! I like to hear about how things were done years ago, or even in modern days in other places. At least if I hear someone say how many stones they weigh, I will have an idea what they mean! Thanks for sharing this with us.


rose-the planner profile image

rose-the planner 3 years ago from Toronto, Ontario-Canada

I found your article quite interesting! In particular, I found the explanation of its' origins very insightful. Thanks for sharing! (Voted up)


Abby Campbell profile image

Abby Campbell 3 years ago from Charlotte, North Carolina Author

Thank you, Kathryn. When my friends from Great Britain would talk about how much they weighed in stones, it was very interesting to say the least. To say that I way "8" or "9" stones is very intriguing.


Abby Campbell profile image

Abby Campbell 3 years ago from Charlotte, North Carolina Author

Thank you rose-the-planner. It's interesting to see the way different countries do things. I would never think that this modern age of people would still use a measurement system from the ancient of days.

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