Unit converters from Tools Veria. Free converters for the units people in the UK still mix every day. Switch between kilograms and stone, cups and grams, gas marks and Celsius, and UK, EU and US clothing, shoe and ring sizes, with tables you can check at a glance.

In This Guide
Quick picks
Not sure where to start? These are the tools people use most in this category.
| I want to | Use this tool |
|---|---|
| Convert kg to stone | Kg to Stone Converter |
| Cups to grams for baking | Cups to Grams Converter |
| Gas mark to °C | Gas Mark Converter |
| UK to EU shoe size | UK to EU Shoe Size |
Cooking and kitchen
2Recipes from any country in UK units.
Weight, length and measurement
3Metric and imperial in both directions.
Clothing and ring sizes
3Shop UK, EU and US sizes with confidence.
Numbers
1Number systems and notation.
Which Unit Converters Do UK Kitchens and Shoppers Need Most?
UK kitchens and shoppers need unit converters most for weight, oven temperature and sizing, because recipes, scales and shops still mix metric, imperial and foreign systems. A good converter uses exact factors and shows the rounded answer you will actually use. Before converting, check which system the source uses, because the same name can mean different amounts in different countries.
For body weight, the Kg to Stone Converter uses the exact definition of one stone as 14 pounds, or 6.35029318 kilograms, so 70 kg is 11 stone 0.3 pounds. Doctors and gyms record kilograms while many people think in stone, so converting both ways avoids rounding errors creeping into a weight log. For height, one foot is exactly 30.48 centimetres, so 5 feet 9 inches is 175.26 cm.
Baking needs more care. Cups measure volume, not weight, so a cup of flour and a cup of sugar give very different gram figures. Before using the Cups to Grams Converter, check whether the recipe is American, where a cup is about 237 ml, or uses the metric cup of 250 ml, and spoon flour lightly rather than packing it. For oven settings, gas mark 4 is about 180°C, and a fan oven usually needs 20°C less.
Size charts are different again. Unit converters for length and weight are exact, but clothing, shoe and ring sizes are typical equivalents, and brands vary. Measure your foot or finger in millimetres where you can, compare that with the chart, and check the brand’s own size guide before ordering from abroad. Ring sizes are a good example: UK sizes use letters, US sizes use numbers, and the safest shared reference is the inside diameter in millimetres. Bookmark the unit converters you use often so the right factor is always one tap away.
Frequently asked questions
How many kilograms are in a stone?
One stone is 14 pounds, which is 6.35 kilograms.
Is a UK cup the same as a US cup?
No. A metric cup is 250 ml and a US cup is about 237 ml, which is why the cups to grams converter asks which cup you mean.
Why do clothing sizes differ between countries?
Each country uses its own sizing system, and brands vary too. Use the charts as a starting point and check the brand size guide.
Are the conversions exact?
Unit conversions use exact factors. Size charts are typical equivalents, so fit can vary by brand.
How we build and check these tools
Every tool is built by hand by the Tools Veria Editorial Team, tested with worked examples and checked against official guidance. Read our editorial policy to see how we review figures when rules change. Key sources for this category:
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