Converting Units Online: Better Than Googling '5 Miles in Km' Each Time
Stop typing conversion queries into Google one at a time. A proper unit converter handles length, weight, temperature, and volume all in one place.
You're following a recipe from a British site and it says 180°C. Your oven uses Fahrenheit. You type "180c to f" into Google. Then the recipe says 200g of flour and you do it again. Then 30cm cake tin. Then 1.5 liters of stock.
There's a faster way. An online unit converter handles all these conversions in one place. Pick the category, enter your number, and see the result instantly. Switch between metric and imperial with one click.
Categories that cover 95% of what you need
The free unit converter covers length (meters, feet, inches, miles, kilometers), weight (kg, lbs, ounces, grams), temperature (Celsius, Fahrenheit, Kelvin), area, volume, speed, and time. That covers cooking, travel, DIY projects, and most everyday conversions.
Temperature is the one people mess up most — remembering whether it's multiply-by-1.8-plus-32 or multiply-by-9/5-plus-32. The converter just does it. No mental math at 7am while trying to preheat the oven.
Quick tip for frequent converters
Bookmark the page. If you find yourself converting the same units repeatedly, keep it in your browser bookmarks bar. It's faster than any app — no opening, no loading screen, just paste and convert.
Tools mentioned in this article
Unit Converter
Convert between common units: length, weight, temperature, area, volume, speed, and time. Real-time conversion as you type. Covers metric and imperial with one-click unit swapping.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. See all four bases at once when you type a number in any format. Includes hex color reference.
Roman Numeral Converter
Convert Roman numerals to numbers and numbers to Roman numerals. Handles values up to 3,999,999 with proper vinculum notation. Quick reference for dates and page numbers.