Popular unit converters
The conversions people search for most, each with an instant answer
Start with the twelve conversions searched most often, then browse popular picks for the kitchen, travel, tech and DIY. Tap any card for the exact converter, formula and chart.
The most-searched conversions
Ordered by estimated monthly searches in the US. Each card shows the answer most people are looking for.
Centimeters to Inches
Celsius to Fahrenheit
Kilograms to Pounds
Inches to Centimeters
Grams to Ounces
Feet to Inches
Megabytes to Gigabytes
Newton-meters to Pound-feet
Square feet to Square meters
Pixels to Inches
Binary to Decimal
PSI to Bar
Around the house and on the road
Speed, distance, weight, temperature and dates for everyday life.
Miles per hour to Kilometers per hour
Kilometers per hour to Miles per hour
Kilometers to Miles
Pounds to Kilograms
Fahrenheit to Celsius
Feet to Meters
Age Calculator
Days Between Dates
In the kitchen
Cups, spoons, grams and milliliters, with US, metric and imperial standards.
Money, time zones and travel
Live reference exchange rates, daylight-saving-aware time zones and nautical speed.
Tech, screens and data
Storage, bandwidth, CSS units, aspect ratios and number bases.
Cars, DIY and engineering
Torque, power, pressure, fuel economy, electricity and concrete.
Pound-feet to Newton-meters
Horsepower to Kilowatts
Watts to Amps
Concrete Volume Calculator
Cubic Yards to Tons
Miles per gallon (US) to Liters per 100 km
PSI to Kilopascals
Kilowatt-hours to BTU
Looking for something else? Browse all 77 converters.
Popular converter FAQs
Short, exact answers to what people ask most.
What are the most popular unit conversions?
Centimeters to inches, Celsius to Fahrenheit and kilograms to pounds are the most searched conversions in the US, followed by inches to centimeters, grams to ounces and feet to inches.
How did you choose these popular converters?
The top 12 are ordered by estimated monthly US search demand from keyword research. The rest are grouped by task: everyday life, cooking, travel and money, tech, and DIY and engineering.
What is the quickest way to convert centimeters to inches?
Divide the centimeters by 2.54. One centimeter is 0.393701 inches, so 30 cm is 11.811 in.
Is there an easy way to estimate Fahrenheit from Celsius?
Double the Celsius figure and add 30 for a quick estimate; the exact rule is × 9/5 + 32. At 20 °C the estimate gives 70 °F against the exact 68 °F.
What is 70 kg in pounds?
70 kilograms is 154.324 pounds, because one pound is exactly 0.45359237 kg.
Why do some converters have a switch for different standards?
Some units have more than one legal definition, such as the US and imperial gallon or decimal and binary gigabytes. The switch uses the exact value of each standard, as listed on our how we verify page.
Browse everything
Every converter uses the exact definition of its units. How we verify our numbers. Last updated .