Online Unit Converter — Convert Anything to Anything

Whether it's km to miles, Celsius to Fahrenheit, or pounds to kilograms — unit conversion is something we all need. Here's a quick reference.

Whether you're cooking with a European recipe, helping with a homework problem, or working with international colleagues, unit conversion comes up more often than you'd think. And while everyone knows the basics (1 inch = 2.54 cm), the math gets annoying fast.

The conversions everyone needs

Temperature: °F = (°C × 9/5) + 32. Or just remember: 0°C = 32°F (freezing), 100°C = 212°F (boiling), 37°C = 98.6°F (body temperature).

Distance: 1 mile = 1.609 km. 1 foot = 30.48 cm. 1 inch = 2.54 cm.

Weight: 1 pound = 0.4536 kg. 1 ounce = 28.35 grams.

Volume: 1 gallon = 3.785 liters. 1 cup = 236 ml.

Why mental math fails

Quick: how many kilograms is 167 pounds? How many liters is 3.5 gallons? What's 425°F in Celsius? Unless you're a human calculator, you need a tool for this. And searching "167 pounds to kg" every time gets old.

Convert instantly

Toolozo's Unit Converter handles all common unit types — length, weight, temperature, volume, area, speed, time, and data storage. Select your category, choose the units, enter the value, and see the result instantly. No ads, no distractions.

For specific calculators, there are also dedicated tools for date calculations, timezone conversion, and Unix timestamps.