Unit Converter
Convert units of length, weight and temperature instantly: feet to cm, inches to cm, lbs to kg, Celsius to Fahrenheit and more. Free online unit converter.
About this tool
Convert between everyday units — length, weight, and temperature, metric and imperial — with precise results as you type. Recipes, travel, homework, and gym plates all keep demanding conversions; this ends the mental approximation.
How to Convert Units
- 1
Pick the measurement category — length, weight, or temperature — and the units you're converting between.
- 2
Enter your value; the converted result updates instantly with proper precision, not a rounded guess.
- 3
Reverse direction or switch units freely — the conversion recalculates live for each change.
Why Convert Units with Wrklyst
- Solved On the Spot
- Conversions compute in your browser as you type — no lookup tables, no submit button, no network dependency.
- Exact, Not Folklore
- Mental shortcuts ('a kilo is about two pounds') drift; the actual factors (2.20462…) don't.
- Free of Clutter
- A converter, not an ad farm with a converter attached — open, convert, move on.
Conversion Habits
- Convert the recipe once, write it down, and cook from the converted copy — mid-cooking math causes mistakes.
- Travelling? Learn two anchors (30°C is hot, 100 km/h is highway speed) and convert the rest as needed.
- Baking is chemistry: convert by weight when possible, since cups measure volume inconsistently.
- Gym plates in mixed units: 20 kg is 44 lbs — the pair worth memorizing.
Frequently asked questions
Why is temperature conversion different from other units?
Length and weight scale by pure multiplication, but Celsius and Fahrenheit have offset zero points — the formula is multiply and shift (F = C × 9/5 + 32). That's why doubling a temperature is meaningless while doubling a distance isn't, and why mental temperature math goes wrong so reliably.
How much precision should I actually use?
Match the stakes: cooking tolerates rounding to sensible amounts, travel needs ballparks, but medication dosing, engineering, and commerce need full precision carried through. The tool gives you exact figures; rounding for convenience is then a choice you make knowingly rather than an error baked in.
What are the most-confused unit pairs?
The classics: pounds versus kilograms (factor ~2.2, in the direction people forget), miles versus kilometers (~1.6), and Fahrenheit versus Celsius (offset formula, no intuitive factor). US recipes add cups and ounces — volume versus weight confusion — where a converter genuinely prevents ruined dinners.
Why do the US and most of the world use different units?
History and inertia: the metric system spread with scientific standardization in the 19th–20th centuries, while the US retained customary units through failed metrication pushes. Practical consequence: anyone dealing across that boundary — travel, trade, recipes, science — converts constantly, which is why this tool exists.