Home / Quick units

Quick unit converter

Length, weight, volume, area, speed and temperature with exact ISO/NIST factors. Converts live as you type.

Common values

Dedicated converters

Centimeters → Inches · Inches → Centimeters · Kilograms → Pounds · Pounds → Kilograms · Kilometers → Miles · Miles → Kilometers · Meters → Feet · Feet → Meters · Millimeters → Inches · Inches → Millimeters · Milliliters → Fluid ounces (US) · Fluid ounces (US) → Milliliters · Grams → Ounces · Ounces → Grams · Liters → Gallons (US) · Gallons (US) → Liters · Celsius → Fahrenheit · Fahrenheit → Celsius · Kilometers per hour → Miles per hour · Miles per hour → Kilometers per hour · Kilograms → Stone · Stone → Kilograms · Cups (US) → Milliliters · Tablespoons (US) → Milliliters

Height & weight

cm to feet & inches · feet to cm · 6 feet in cm · 5'10 in cm · kg to stone & lb · 70 kg in lb · 80 kg in lb · 100 kg in stone

Frequently asked

Is one inch exactly 25.4 mm?

Yes — by international agreement since 1959, the inch is defined as exactly 25.4 millimetres.

How many kilometres is a mile?

Exactly 1.609344 km. The other direction: one kilometre is about 0.621 miles.

What is the Celsius to Fahrenheit formula?

°F = °C × 9⁄5 + 32. So 20 °C is 68 °F, and the two scales cross at −40.

Screens & TVs

TV sizes · 43″ · 55″ · 65″ · TV in car? · 24″ monitor · 27″ monitor · 13″ laptop · 15.6″ laptop

Beds

US/UK/EU chart · King · Queen · Full · Twin · Single · Double · Super King · Cal King · Queen in Europe

Volume & area

330 ml · 500 ml · 750 ml · 1 L in oz · gallon→L · half gallon · m²→ft² · ft²→m² · 50 m² · 100 m²

Speed & travel

100 km/h · 120 km/h · 130 km/h · 60 mph · 70 mph · carry-on size · checked size

Height & bikes

bike size by height · cm→feet · feet→cm

Common object sizes

all objects · credit card · business card · door size · passport photo · phone screen

Card & object sizes

credit card cm · in mm · in inches · dimensions · standard size · bank card