Measurement Converter
Convert length, weight, temperature and volume between metric and US units, turn cups and spoons into grams for common ingredients, and find your shoe or ring size in US, UK, EU and Asian sizes. Results appear as you type.
Free · No sign-up
How to use it
- Choose what you want to convert: length, weight, temperature, volume, cooking, shoe size or ring size.
- Enter the value and choose the units to convert from and to. For cooking, also choose the ingredient.
- For shoe and ring sizes, choose the size system you know and enter your size or your measurement.
- Read the result, the value in every unit or the full size chart, and copy it if you need it.
Why use this tool
Seven converters in one
Length, weight, temperature, volume, cooking, shoe size and ring size on one page, with the last one you used remembered.
Every unit at once
See your value in all units of the same kind, from millimeters to nautical miles or from milligrams to stone.
Cups to grams
Convert US, metric and Japanese cups and spoons to grams for flour, sugar, butter, rice, honey and more.
Shoe and ring sizes
US men's and women's, UK, EU, Japan, China and India sizes, worked out from your foot length or ring measurement.
Local units
Includes the Chinese jin, the Indian tola, the British stone and UK pints and gallons.
Private
Everything is calculated in your browser. Nothing you enter is sent or stored.
How unit conversion works
Every unit is converted through one base unit: meters for length, kilograms for weight and liters for volume. The exact definitions are 1 inch = 2.54 cm, 1 pound = 0.45359237 kg and 1 US gallon = 3.785411784 liters.
Temperature is different because the scales start at different points: °F = °C × 9/5 + 32, and K = °C + 273.15.
Common conversions
Quick answers to the conversions people look up most:
| From | To | Factor |
|---|---|---|
| 1 inch | centimeters | 2.54 |
| 1 foot | meters | 0.3048 |
| 1 mile | kilometers | 1.609344 |
| 1 pound | kilograms | 0.45359237 |
| 1 ounce | grams | 28.3495 |
| 1 US gallon | liters | 3.78541 |
| 1 US cup | milliliters | 236.588 |
| 1 stone | kilograms | 6.35029 |
Cups to grams for common ingredients
One cup of a dry ingredient weighs much less than a cup of water. These are the values the converter uses for one US cup (236.6 ml):
| Ingredient | 1 US cup | 1 tablespoon |
|---|---|---|
| Water | 237 g | 15 g |
| All-purpose flour | 125 g | 8 g |
| White sugar | 201 g | 13 g |
| Brown sugar, packed | 220 g | 14 g |
| Butter | 227 g | 14 g |
| Uncooked rice | 185 g | 12 g |
| Honey | 336 g | 21 g |
| Rolled oats | 90 g | 6 g |
Shoe size chart for adults
Sizes by foot length as used by most large sports brands. Women's US sizes are 1.5 above men's. In India and the UK the same numbers are used; in Japan and China shoes are sized by foot length in centimeters (for example 26 or 260).
| Foot length | US men | US women | UK | EU |
|---|---|---|---|---|
| 23 cm | 5 | 6.5 | 4 | 37.5 |
| 24 cm | 6 | 7.5 | 5 | 39 |
| 25 cm | 7 | 8.5 | 6 | 40 |
| 26 cm | 8 | 9.5 | 7 | 41.5 |
| 27 cm | 9 | 10.5 | 8 | 42.5 |
| 28 cm | 10 | 11.5 | 9 | 44 |
| 29 cm | 11 | 12.5 | 10 | 45 |
| 30 cm | 12 | 13.5 | 11 | 46.5 |
Ring size chart
Ring sizes by inside diameter and circumference. The EU size is the circumference in millimeters; Japanese sizes go up by about 1 mm of circumference per size, and Chinese and Indian charts are close to the Japanese numbers.
| US | UK | EU | Japan | Diameter |
|---|---|---|---|---|
| 5 | J½ | 49 | 9 | 15.7 mm |
| 6 | L½ | 52 | 12 | 16.5 mm |
| 7 | N½ | 54 | 14 | 17.3 mm |
| 8 | P½ | 57 | 17 | 18.1 mm |
| 9 | R½ | 60 | 20 | 18.9 mm |
| 10 | T½ | 62 | 22 | 19.8 mm |
| 11 | V½ | 65 | 25 | 20.6 mm |
| 12 | X½ | 67 | 27 | 21.4 mm |
How to measure at home
A few tips give a much more accurate result:
- Feet: stand on a sheet of paper against a wall, mark the longest toe and measure from the wall to the mark.
- Measure both feet and use the longer one; feet are largest in the evening.
- Rings: measure the inside diameter of a ring that fits the same finger, from edge to edge.
- Or wrap a strip of paper around the base of the finger, mark where it overlaps and measure the length.
- Fingers swell when warm; measure at room temperature and allow for a larger knuckle.
- Cooking: spoon flour into the cup and level it; scooping packs in up to 20% more.
Frequently asked questions
How many centimeters are in a foot?
One foot is exactly 30.48 cm, and one inch is 2.54 cm. So 6 feet is 182.88 cm, and 5 feet 9 inches is 175.26 cm.
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32. For example 37 °C × 1.8 + 32 = 98.6 °F. To go back, subtract 32 and multiply by 5/9.
How many grams is a cup of flour?
About 125 g for all-purpose flour spooned into a US cup and leveled. Sugar is about 200 g a cup and butter about 227 g. The converter uses these averages.
Is a US cup the same as a metric cup?
No. A US cup is 236.6 ml, a metric cup used in Australia, Canada and New Zealand is 250 ml, and a Japanese cooking cup is 200 ml.
What is my EU shoe size if I am a US 10?
A US men's 10 is usually EU 44 and UK 9, for a foot about 28 cm long. A US women's 10 is about EU 42. Brands differ slightly, so check their own chart.
How do I find my ring size?
Measure the inside diameter of a ring that fits, or the circumference of your finger with a strip of paper, and enter it. A 17.3 mm diameter is US 7, UK N½ and EU 54.
Is my data sent anywhere?
No. Everything is calculated in your browser. The page only remembers which converter you used last on this device.
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