Converters / TOOLKIT
Unit Converter
Convert any value across eight unit categories - all results update as you type.
Free to use · No account needed
How to use
- Choose a category - length, weight, temperature, area, volume, data, time or speed.
- Enter a value and select its unit. Every other unit in the category converts instantly.
- Click any result row to copy it.
Convert between metric and imperial units - length, weight, temperature, area, volume and more. Instant answers for cooking, construction, travel and science. No more Google search for '5 feet in cm'.
Use cases
1. Use case: Cooking conversions Convert grams to cups or Celsius to Fahrenheit while following an international recipe.
2. Use case: Engineering unit checks Convert between metric and imperial units (length, weight, temperature, area) for projects and estimates.
Practical tips
Temperature is the classic trap: Celsius-to-Fahrenheit is a formula, not a ratio, so never scale temperature differences the way you scale lengths. For cooking, remember volume and weight measure different things — a cup of flour and a gram scale disagree on purpose. Check the category header after every switch; the unit list changes with it. Click any result row to copy it before navigating away. Like every tool on this site, the Unit Converter runs entirely in your browser: the data you enter never leaves your device, nothing is uploaded to a server, and the tool keeps working if your connection drops.
Common mistakes
Most wrong results come from setup errors, not from the math:
- Converting before picking the right category — entering 100 while the category is still on Length when you meant weight produces a confident-looking but meaningless answer.
- Treating temperature like a length: 20°C is not twice as hot as 10°C, because the scales have different zero points.
- Confusing KB (decimal, 1000 bytes) with KiB (binary, 1024 bytes) when comparing a drive's label to what the operating system reports.
- Rounding mid-chain: convert once to the final unit instead of chaining approximations through intermediate units.
Why use this tool
Reach for a dedicated converter instead of a search result when:
- You need batch conversions across many units at once, where a search answers one pair at a time.
- The conversion involves families a search handles poorly, such as binary versus decimal data sizes.
- You are offline — travel, labs, field work — and the page keeps working without a connection.
- You want to check a search answer against an exact calculation when the numbers matter.
Frequently asked questions
Does the Unit Converter send my data anywhere?
No. It runs entirely in your browser — your input is processed on your device and never uploaded. Refresh the page and it still works offline.