Kg to Stones Converter
Convert kilograms into decimal stones, stones and pounds, total pounds, and ounces using the international avoirdupois pound.
Enter mass
Required. Enter a nonnegative decimal using a period as the decimal separator.
Converted mass
Nearby conversion table
| Kilograms | Decimal stones | Stone and pounds | Total pounds |
|---|---|---|---|
| 80 kg | 12.60 st | 12 st 8.37 lb | 176.37 lb |
| 85 kg | 13.39 st | 13 st 5.39 lb | 187.39 lb |
| 90 kg | 14.17 st | 14 st 2.42 lb | 198.42 lb |
| 95 kg | 14.96 st | 14 st 13.45 lb | 209.44 lb |
| 100 kg | 15.75 st | 15 st 10.46 lb | 220.46 lb |
The table is centered on the current input in 5 kg steps and uses the same unrounded model as the headline results and Excel workbook.
How to use the kg to stones calculator
What this calculator does. This tool converts a mass entered in kilograms into four closely related avoirdupois expressions: decimal stones, whole stones plus remaining pounds, total pounds, and total ounces. It is useful when a metric measurement must be read in the stone-and-pound convention still commonly encountered in the United Kingdom and Ireland. It is a unit conversion, not a health assessment, medical recommendation, or statement about an appropriate body weight.
When to use it. Use it to translate a scale reading from kilograms for a UK form, compare older records written in stones with newer metric records, understand a sports or travel document that uses different mass units, or check a product or luggage mass expressed in kilograms against an imperial-style reference.
How to calculate. The calculator opens with a complete demonstration of 90 kilograms, so the results and the Excel workbook are available immediately. To make your own conversion:
- Replace the value in Kilograms with the mass you want to convert. Enter an ordinary nonnegative decimal such as 72.5. Use a period for decimals; comma-formatted or scientific-notation entries are rejected to avoid ambiguity.
- Read Decimal stones for a single continuous stone value. Read Stones and pounds when you need the conventional mixed-unit form.
- Use Total pounds or Total ounces when a document requests those units rather than stones.
- Select Download Excel to save the current input, outputs, assumptions, conversion table, and scenario checks in a validated .xlsx workbook.
- Select Reset to clear the demonstration and all calculated content. Reset intentionally leaves the required field empty, so Excel download is disabled until a complete valid kilogram value is entered again.
Input guide. Kilograms is the only required control. It accepts a finite nonnegative number in kilograms, including zero and decimal values. A realistic example is 90. Increasing the input increases every converted output proportionally; halving the kilogram value halves stones, pounds, and ounces. Do not include “kg,” a comma decimal such as “1,5,” or scientific notation such as “1e3” in the field. Extremely large values that would overflow normal numeric calculation are rejected.
Output guide. Decimal stones is the exact conversion displayed to two decimal places. Stones and pounds separates the result into whole stones and the remaining pounds, with pounds shown to two decimals. Total pounds and Total ounces are equivalent continuous values. Conversion factor shows how many stones correspond to one kilogram. The summary pills repeat the current kilograms, decimal stones, and mixed stone-pound result for quick scanning. The nearby table shows the current value and four neighboring 5 kg steps; each row contains kilograms, decimal stones, mixed stones and pounds, and total pounds. Zero kilograms produces zero in every output, while larger values remain a direct linear conversion rather than a recommendation.
Worked example. For the startup value of 90 kg, the calculator first converts kilograms to pounds using the international avoirdupois definition: 90 ÷ 0.45359237 = 198.416035 lb. It then divides by 14 pounds per stone: 198.416035 ÷ 14 = 14.172574 stones. Rounded for display, that is 14.17 st. The whole-stone portion is 14, and the remainder is (14.172574 – 14) × 14 = 2.416035 lb, displayed as 14 st 2.42 lb. The same model gives 3,174.66 oz.
Learn more. The conversion uses the international avoirdupois pound value documented in the NIST conversion factors for mass. For background on the metric unit itself, see NIST's explanation of the SI kilogram unit.
Formula and interpretation
stones = kilograms ÷ (0.45359237 × 14)
One stone contains exactly 14 avoirdupois pounds. The international pound is exactly 0.45359237 kilograms, so one stone equals 6.35029318 kilograms. Dividing kilograms by 6.35029318 therefore gives decimal stones. To create the mixed form, take the whole-number portion as stones and multiply the remaining fraction by 14 to obtain pounds.
Because the underlying conversion is linear, there is no threshold, category, or nonlinear adjustment. The display rounds results for readability, while the spreadsheet stores canonical numeric values and applies number formats. For a broader view of exact and approximate unit conversions, NIST's Guide to the SI conversion-factor appendix explains how conversion factors are applied.
Common mistakes
- Do not treat the decimal part of stones as pounds. For example, 14.17 stones is not 14 stone 17 pounds; multiply the decimal part by 14.
- Do not use a rounded mental factor when precise records matter. Multiplying kilograms by 0.1575 is convenient, but the calculator uses the exact pound definition.
- Keep mass and force distinct. In everyday use people often say “weight,” but this converter performs a mass-unit identity.
- Preserve sensible significant figures. A highly precise conversion cannot make an imprecise original measurement more accurate.