# Unit Converter — Length, Weight & Temperature

Convert between metric and imperial units — cm to inches, kg to pounds, °C to °F, and more. 100% in your browser — free, no sign-up.

## What can it convert?

It converts common units of length (mm, cm, m, km, inches, feet, yards, miles), weight (mg, g, kg, tons, ounces, pounds, stone), and temperature (Celsius, Fahrenheit, Kelvin). Pick a category, choose the units, and the result updates as you type.

## How it works

Length and weight are converted through a base unit (meters and kilograms) using exact factors, so results are precise. Temperature uses the standard formulas rather than a simple ratio, because the scales have different zero points. Everything runs in your browser.

## Common conversions

1 inch = 2.54 cm, 1 foot = 30.48 cm, 1 mile = 1.609 km; 1 pound = 0.4536 kg, 1 kg = 2.2046 pounds, 1 ounce = 28.35 g. For temperature, °F = °C × 9/5 + 32, and °C = (°F − 32) × 5/9.

## Metric vs imperial

Most of the world uses metric (meters, kilograms, Celsius); the US mainly uses imperial (feet, pounds, Fahrenheit). A converter bridges the two — useful for recipes, travel, DIY, shipping, and reading measurements from another country.

## How to

1. Choose a category: length, weight, or temperature.
2. Pick the From and To units and enter a value.
3. Read the converted result instantly (use ⇄ to swap).

## FAQ

**Which units can I convert?**

Length (mm, cm, m, km, in, ft, yd, mi), weight (mg, g, kg, t, oz, lb, st), and temperature (°C, °F, K).

**How do I convert cm to inches?**

Choose Length, set From to centimeters and To to inches, and type the value. 1 inch = 2.54 cm.

**Are the results accurate?**

Yes. Length and weight use exact conversion factors through a base unit; temperature uses the standard formulas. Everything is computed in your browser.

**Can I quickly reverse a conversion?**

Yes. Use the ⇄ swap button to switch the From and To units instantly.

**Is it free?**

Yes, completely free — no sign-up and no watermark.

**Is my data private?**

Yes — this tool runs entirely in your browser. Your files and text are never uploaded.


## Related

- [CM to Inches — Convert Centimeters to Inches](/convert/cm-to-inches)
- [Inches to CM — Convert Inches to Centimeters](/convert/inches-to-cm)
- [MM to Inches — Convert Millimeters to Inches](/convert/mm-to-inches)
- [Feet to CM — Convert Feet to Centimeters](/convert/feet-to-cm)
- [CM to Feet — Convert Centimeters to Feet](/convert/cm-to-feet)
- [KM to Miles — Convert Kilometers to Miles](/convert/km-to-miles)
- [Miles to KM — Convert Miles to Kilometers](/convert/miles-to-km)
- [KG to LBS — Convert Kilograms to Pounds](/convert/kg-to-lbs)
- [LBS to KG — Convert Pounds to Kilograms](/convert/lbs-to-kg)
- [Grams to Ounces — Convert g to oz](/convert/grams-to-ounces)
- [Celsius to Fahrenheit — Convert °C to °F](/convert/celsius-to-fahrenheit)
- [Fahrenheit to Celsius — Convert °F to °C](/convert/fahrenheit-to-celsius)