Unit Converter
Convert length, weight, volume, and temperature instantly. Clean, simple, private.
What is a unit converter and why use it?
A unit converter is a tool that allows you to quickly convert measurements from one unit to another. Whether you're cooking, traveling, studying, or working on a DIY project, converting between different systems (metric, imperial, etc.) is a common need.
Common use cases
- Travel: Convert miles to kilometers, pounds to kilograms, or Fahrenheit to Celsius.
- Cooking & baking: Convert cups to milliliters, ounces to grams, or tablespoons to teaspoons.
- Fitness: Track your weight in kilograms or pounds, or measure distances in miles or kilometers.
- Education: Students often need to convert between units for science and math assignments.
- International business: Convert measurements for shipping, manufacturing, or product specifications.
How to use this tool
Simply select a category (Length, Weight, Volume, Temperature), enter your value in the "From" field, and choose the units you want to convert from and to. The result updates instantly. Use the swap button to quickly reverse the conversion.
All calculations happen in your browser – your data never leaves your device.
Why use Pencilfree Unit Converter?
100% Private
Your numbers never leave your device. No server, no storage.
Unlimited & Free
No limits, no sign‑up, no payments. Use as much as you want.
Instant Results
See converted values as you type – no waiting.
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Frequently Asked Questions
How do I convert miles to kilometers?
Select Length, enter the miles in the "From" field, and you'll see kilometers instantly in the "To" field.
Do you support all units?
We support the most common units for length, weight, volume, and temperature. More coming soon!
Is my data private?
100% private. All conversions happen in your browser – nothing is sent to any server.