Unit Converter: kg to lbs, km to miles, °C to °F
Free online unit converter for length, weight, temperature & volume. Convert kg to lbs, km to miles, Celsius to Fahrenheit instantly.
How it works
Choose a category (length, weight, temperature, or volume), enter a value, and pick the units to convert between. Results update instantly.
About Unit Converter
Informational only, not professional advice. Report an error.
The recipe says 175 cm and your American brain freezes; or you are packing for Europe and the airline limit is 23 kg. Recipes, science homework, travel, and DIY projects mix measurement systems, and guessing conversions is how people miss flights or ruin bakes.
Enter value, from-unit, to-unit, and category (or let the tool infer from units). Conversion goes via a base unit per category, meters for length, kilograms for mass, liters for volume, Celsius for temperature. Temperature uses affine conversion (°F = °C×9/5 + 32), not a simple multiplier.
Volume gallons here are US liquid gallons, not imperial UK gallons. Cooking cups are US customary. Road trip speed limits in km/h versus mph and luggage weight limits in kg versus lb are everyday scenarios where picking the wrong category produces nonsense, double-check the unit labels.
For precise engineering or medical dosing, confirm significant figures and regulatory unit requirements beyond this consumer tool. 2.5 liters to US cups for a recipe, 160 lb to kg for a gym app abroad, same engine, different categories.
Output precision follows engine formatting, extreme values may use scientific notation in the UI. Category picker disambiguates oz (fluid versus weight) when both exist.
UK imperial gallons, stone, and specialty engineering units may be absent. Medical dosing always verify with a professional. Baking by weight (grams) versus volume (cups) for flour varies by humidity, weight scales beat cup conversions for serious baking.
Running pace (minutes per mile versus minutes per kilometer) is a mental conversion runners use constantly, convert distance first, then divide time by the new distance for race planning abroad. Stone and pounds mix in UK body weight references, convert to kg first when a health app expects metric even if the form shows imperial labels. Baking flour by volume versus weight varies with humidity and scoop technique, serious bakers weigh in grams even when a recipe lists cups, because mass conversions are more repeatable than cup conversions.
Common use cases
- Check homework-style physics calculations with constants shown on the page.
- Convert between units that appear together in spectroscopy and quantum exercises.
- Compare manual paper results with browser output before submitting a lab worksheet.
- Jump to related physics tools when a problem asks for both wavelength and energy.
- Use Energy Unit Converter (J ↔ eV) for the next quantity in the same problem set.
How to use Unit Converter
- Open the tool. Navigate to Unit Converter on FindMeTool.
- Paste or enter input. Add the text, numbers, or dates you want to transform.
- Review output. Check the result panel. Errors usually point to the line or field that needs fixing.
- Copy or download. Copy clean output or download when the tool supports it.
- Use related tools. Follow the related links below when your workflow needs a validator, formatter, or converter next.
Examples
Sample input idea
Try a short snippet like: 10 kilometer mile length. Replace it with your own data before sharing output.
Homework check
Write units on paper first, then enter values into Unit Converter. Compare the browser result with your manual calculation using the same constants shown on the tool.
What Unit Converter helps with
This page is the canonical home for unit converter on FindMeTool. The sections below group common search intents so you can scan by task instead of hunting through keyword lists.
Core task
Unit Converter focuses on this preset. Typical searches like unit converter, unit converter tool, unit converter calculator belong on this page.
Free online access
You can run unit converter online with no signup or install. Results appear in the tab so you can copy them into your editor, spreadsheet, or chat.
Privacy and local processing
Inputs you enter stay on your device for this session. Avoid pasting sensitive data you would not store locally.
Workflow and how-to
People often arrive from searches like how to unit converter, how do i unit converter, best way to unit converter. The workflow is: paste input, confirm output, then jump to a related tool if the next step is validation, formatting, or conversion.
Troubleshooting
When something looks wrong, re-check input format, try a smaller sample, and read any inline error message. The common mistakes section below lists fixes for frequent issues.
Quick tips
- Specify category if auto-detect fails on ambiguous symbols like oz.
- US vs UK gallons differ, this tool uses US liquid gallons.
- Cooking conversions are approximate for dry vs liquid ingredients.
- Double-check medical doses with a pharmacist, do not rely on a web converter.
Formulas
length/weight/volume: value_base = fromUnit.toBase(value)result = toUnit.fromBase(value_base)°F = °C × 9/5 + 32
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Open the full unit converter for any custom conversion.
This tool is part of the free Physics collection on FindMeTool. Explore more Physics tools or browse the full tool directory.