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Free Unit Converter: Length, Weight, Temperature & More
Tooly · 2026-08-02 · 5 min read
Miles to kilometers for a trip, pounds to kilograms for a recipe, Celsius to Fahrenheit for the weather — unit conversions are a daily fact of life. A free unit converter handles them all instantly, with no apps to install and nothing sent to a server.
What you can convert
- Length — meters, feet, inches, miles, kilometers, yards
- Weight — kilograms, pounds, ounces, grams, tons
- Temperature — Celsius, Fahrenheit, Kelvin
- Volume — liters, gallons, cups, milliliters
- Speed — km/h, mph, knots, m/s
Convert units free with Tooly
The Tooly Unit Converter covers all of it in one box:
- Pick the category, enter the value, get the result instantly
- Convert in both directions with a click
- Runs entirely in your browser — nothing uploaded
- Free, no signup, works on any device
Common conversions worth knowing
| Conversion | Result |
|---|
| 1 mile | 1.609 kilometers |
| 1 kilogram | 2.205 pounds |
| 1 gallon | 3.785 liters |
| 0°C | 32°F |
| 100 km/h | 62.1 mph |
When you'll use it
- Travel planning and packing (distances, weights, temperatures)
- Cooking and baking with international recipes
- Fitness and health tracking (weights, distances)
- Science homework and lab work
- Business logistics — and for statements, pair with BankToCSV
Frequently Asked Questions
Is this unit converter really free? Yes — unlimited conversions, no account, no watermark, no limits.
Is my input uploaded? No — conversion runs entirely in your browser, so your numbers stay on your device.
Does it work on mobile? Yes — fully responsive and works on any device with a browser.
What about temperature specifically? The Celsius to Fahrenheit tool has the dedicated converter with a reference table.
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