Weight Converter
Conversion Formula
Grams to Stones Formula
To convert between grams and stones, use these formulas:
Stones to Grams Formula
Enter a value in either field above to see the conversion result in the other field.
Common Conversions
| Grams | Stones |
|---|---|
| 1000 g | 0.157 st |
| 5000 g | 0.787 st |
| 6350 g | 1 st |
| 10000 g | 1.575 st |
| 50000 g | 7.874 st |
| 100000 g | 15.747 st |
About Stones
Typical Use Cases
The stone is the traditional unit for measuring human body weight in the United Kingdom and Ireland. It's commonly used in medical settings, gyms, and by the general public when discussing personal weight. UK-based weight loss programs, fitness apps, and health services typically report body weight in stones and pounds rather than kilograms, making this conversion essential for anyone tracking weight using UK standards or communicating with UK-based health professionals.
Historical Background
The stone as a unit of weight dates back to medieval England, where it was used for trade. Originally, different commodities had different stone weights (e.g., wool stone vs. butcher's stone), but the imperial stone was standardized at 14 pounds (6.35029 kg) in 1835. Despite the UK's official adoption of the metric system, the stone remains deeply ingrained in British culture for personal weight measurements and is unlikely to disappear from everyday use anytime soon.
Conversion Tips
When converting grams to stones for body weight, remember that results will be very small decimals (e.g., 1000g = 0.157 stone). It's more practical to think in kilograms first, then stones: 1 stone = 6.35 kg ≈ 6350g. For weight tracking, UK residents often express weight as "X stones Y pounds" rather than decimal stones (e.g., "11 stone 7" instead of "11.5 stones"). To convert grams to this format, first get total pounds (grams × 0.00220462), then divide by 14 to get stones with remainder in pounds.
Frequently Asked Questions
How many grams are in a stone?
One stone equals 6350.29 grams (or 6.35 kilograms). This is equivalent to exactly 14 pounds in the imperial system.
Why does the UK use stones for body weight?
The stone is a traditional British unit that remains culturally significant. Despite metrication efforts, UK citizens continue to use stones and pounds for personal weight due to generations of familiarity and its prevalence in healthcare and fitness contexts.
How do I convert my weight from grams to stones and pounds?
First convert grams to pounds (multiply by 0.00220462), then divide by 14 to get stones. The whole number is stones, and the decimal × 14 gives you the remaining pounds. For example, 70kg = 70,000g = 154 lbs = 11 stone 0 pounds.
Do UK doctors and hospitals use stones for patient records?
Yes, many UK healthcare providers still record patient weight in stones and pounds alongside kilograms, particularly in primary care and outpatient settings. While the NHS officially uses metric units for clinical calculations, patient-facing materials often include stones because most British people think of their weight this way. Hospital charts might show "70kg (11st 0lb)" to aid patient understanding. However, for precise medical dosing and pediatric measurements, kilograms are always used exclusively. If you're communicating with UK healthcare professionals about weight management or medication, expect both units to appear in documentation.
Why is one stone equal to 14 pounds and not a round number?
The 14-pound stone originates from medieval England's complex weight system, where different commodities had different stone values. The butcher's stone of 8 pounds, the wool stone of 14 pounds, and others coexisted until the Imperial Weights and Measures Act of 1835 standardized it at 14 pounds. This choice likely reflected the dominance of the wool trade in British commerce at the time. While it seems arbitrary today, the 14-pound standard became so culturally embedded that it survived metrication efforts. Americans abandoned the stone entirely, but British attachment to "losing a stone" or "11 stone 7" as personal milestones keeps the unit alive in daily conversation despite its mathematical inconvenience.
About Our Conversion Standards
Our weight conversions are based on the International System of Units (SI) and standards published by the National Institute of Standards and Technology (NIST). All conversion factors are accurate to at least 6 decimal places, ensuring precision for both everyday and professional use.
Data Sources: NIST Handbook 44, International Bureau of Weights and Measures (BIPM), ISO 80000-3:2006
Last Verified: October 2025