What units can I convert with this tool?

You can convert length, weight, temperature, volume, area, and speed units including metric and imperial measurements.

Is this unit converter free?

Yes. ToolAdda's Unit Converter is completely free and requires no sign-up or installation.

Does it work offline?

Yes. After the page loads, conversions run locally in your browser without sending data to a server.

Can I convert Celsius to Fahrenheit?

Yes. Open the Temperature category and convert between Celsius, Fahrenheit, and Kelvin instantly.

How accurate are the conversions?

Conversions use standard international conversion factors and display results with high precision for everyday and professional use.

🔄 Utility Tool ⚡ Live 📏 6 Categories 🌍 Metric + Imperial

Free Online Unit Converter

Convert length, weight, temperature, volume, area, and speed instantly. Type a value, pick your units, and get accurate results in real time — no sign-up, no upload.

⚡

Live conversion Results update instantly as you type or change units.

🔁

One-click swap Reverse from/to units and values with a single tap.

🌍

Metric & imperial Convert km, miles, kg, lbs, °C, °F, liters, gallons, and more.

🛡️

Browser-only All calculations happen locally on your device.

Convert units instantly

📏 Length

From

Meter (m) → Kilometer (km) • Live conversion

What is this online unit converter?

This free unit converter helps you convert measurements between metric and imperial systems for everyday tasks, school work, travel, cooking, fitness, and engineering. Switch categories, enter a value, and get accurate results instantly.

How to use

Select a category: Length, Weight, Temperature, Volume, Area, or Speed.
Enter a value in the From field and choose your units.
View the converted result instantly in the To field.
Use Swap to reverse units or Copy to save the result.

Popular conversions

Kilometers to miles (km → mi)
Kilograms to pounds (kg → lb)
Celsius to Fahrenheit (°C → °F)
Liters to gallons (L → gal)
Square feet to square meters (ft² → m²)

Frequently asked questions

Which unit categories are supported?

Length, weight, temperature, volume, area, and speed — covering the most common metric and imperial units.

Can I convert both ways?

Yes. Change either unit dropdown or use the Swap button to reverse the conversion direction instantly.

Is this unit converter accurate?

Yes. Conversions use standard international factors, including precise constants for weight and temperature formulas.

Do I need to install anything?

No. The tool runs entirely in your web browser on desktop and mobile devices.

Is my data stored or uploaded?

No. All calculations happen locally in your browser and nothing is sent to a server.