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Free Unit Converter. Convert units online for free: length, weight, temperature, speed, data, and more. Instant, accurate conversions in a clean interface.

Unit Converter

Convert between length, weight, temperature, volume, speed, area, and data units

Convert Units
0.001
Common Conversions

1 mile → km

1.60934

1 inch → cm

2.54

1 pound → kg

0.4536

1 gallon → liters

3.7854

32°F → °C

0

1 GB → MB

1024

1 acre → m²

4046.86

1 knot → km/h

1.852

All processing happens in your browser. No data is sent to any server.

Key Features & Benefits

8 Unit Categories

Convert between Length, Weight, Temperature, Volume, Speed, Area, Data Storage, and Time units — covering the most common conversion needs for daily life, travel, cooking, and technical work.

Instant Live Conversion

Results update in real-time as you type. No need to click a button — just enter your value and see the converted result immediately. Swap units with one click for reverse conversion.

Common Conversion Reference

A quick-reference grid of the most frequently used conversions (1 mile to km, 1 pound to kg, 32°F to °C, etc.) for fast lookups without entering values.

Copy Results Instantly

Click the copy button to instantly copy the converted value to your clipboard. Perfect for pasting into documents, messages, or spreadsheets.

All Processing in Your Browser

No data is sent to any server. All conversion logic runs locally using JavaScript's math functions, making it fast, private, and works even with a slow internet connection.

Unit Converter – Frequently Asked Questions

How accurate are the conversions?
The unit converter uses precise mathematical conversion factors with up to 10 significant digits. For everyday conversions (miles to km, pounds to kg), the accuracy exceeds typical practical needs. Scientific notation is used for very large or small results.
Does the temperature conversion handle extreme values?
Yes, the temperature converter works with any valid Celsius, Fahrenheit, or Kelvin value. It uses the standard formulas: °F = °C × 9/5 + 32 and K = °C + 273.15, which are accurate across the full range of temperatures.
Can I convert between data storage units like TB to GB?
Yes! The Data Storage category supports conversions between Bytes, KB, MB, GB, TB, and PB using binary (1 KB = 1024 Bytes) conventions, which is the standard operating systems use for memory and file size reporting.
Why is the volume category useful for cooking?
The volume converter includes cups, tablespoons (tbsp), teaspoons (tsp), fluid ounces, and milliliters — the exact units used in recipes. This makes it easy to convert between US and metric recipe measurements.
Is there a limit to how many conversions I can do?
No. The unit converter runs entirely in your browser with no server-side processing or daily limits. Convert as many values as you need, anytime, for free.