Free Unit Converters That Work Instantly
Convert height, weight, temperature, length, cooking measurements and shoe sizes in both directions. Every tool updates as you type, shows the formula it uses, and includes a handy reference table — no sign-up, no downloads.
All Converters
Height Converter
Centimeters to feet & inches, meters, and back — with a 150–200 cm reference table.
Weight Converter
Kilograms to pounds, ounces and stones, in both directions, with a conversion table.
Temperature Converter
Celsius, Fahrenheit and Kelvin, plus reference points like freezing, boiling and body temperature.
Length Converter
Kilometers, miles, meters, feet, yards, inches, centimeters and millimeters at once.
Cooking Converter
Cups to grams for flour, sugar, butter and more, plus tablespoons and teaspoons to milliliters.
Shoe Size Converter
US, UK and EU shoe sizes for men, women and kids — instant lookup plus full charts.
Popular Conversions
- 180 cm in feet — 180 cm = 5 ft 10.87 in
- 70 kg in pounds — 70 kg = 154.32 lb
- 100°F in Celsius — 100°F = 37.78°C
- 1 cup of flour in grams — 1 cup all-purpose flour = 120 g
- 5 miles in kilometers — 5 mi = 8.05 km
- US men's 9 in EU size — US 9 = UK 8.5 = EU 42.5
Why Use These Converters?
Most converter sites make you press a button, reload the page, or wade through ads before showing a single number. Ours are different: results update as you type, both conversion directions sit side by side, and each page explains the exact formula and rounding it uses. Your numbers never leave your browser — every calculation happens on your own device.