Cooking
Adapting recipes in pounds, ounces and degrees Fahrenheit to the units you work in.
Unit converter
Convert weight, length, temperature and speed.
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What it is for
Converting units is one of those operations needed daily that almost nobody remembers beyond a couple of cases. How many centimetres in an inch, what miles per hour come to in kilometres, what 350 degrees Fahrenheit means for the oven.
The problem shows up mostly when handling information from abroad. Recipes come in pounds and ounces, televisions are measured in inches, technical manuals use a different system, and weather forecasts change scale depending on the country.
Temperature works differently from the rest and it is worth knowing why. Length, weight and speed convert by multiplying by a factor, but Celsius, Fahrenheit and Kelvin do not share a zero point, so their formula includes an offset as well.
How it works
- Choose the category: length, weight, temperature or speed.
- Type the value and select the source and target units.
- The result is calculated and updated automatically as you type.
When to use it
Shopping and spec sheets
Inches for screens and wheels, pounds for luggage: converting helps you genuinely compare.
Travel
Making sense of speed limits, distances and temperatures in countries using another system.
Practical tips
- The result is rounded to four decimals, enough for any practical use.
- Watch out for measurements sharing a name: a nautical mile is not a land mile.
- Ounces of weight and fluid ounces are different units. In cooking this is a frequent mistake.
- For calculations that really matter, check the result against a second reference before relying on it.
Frequently asked questions
Why is temperature calculated differently from the rest?
Length, weight and speed are proportional conversions (multiply by a factor), while Celsius, Fahrenheit and Kelvin use formulas with an offset, not just a scale factor.
How many decimal places does the result show?
It's rounded to 4 decimal places to keep precision without being impractical to read.