Unit Converter
Convert units of length, weight, temperature, area, volume & speed instantly. Supports kg to lbs, cm to inches, Celsius to Fahrenheit & more. Free and accurate.
About this tool
Whether you are cooking with an international recipe, studying physics, or planning a road trip abroad, unit conversions are an everyday necessity. This Unit Converter supports six of the most commonly needed categories: length, weight, temperature, area, volume, and speed.
All calculations are performed instantly in your browser with no network requests. The converter uses precise conversion factors sourced from international measurement standards (SI), so you can trust the results for both casual and professional use.
menu_bookQuick Reference
- 1 inch = 2.54 cm
- 1 foot = 30.48 cm
- 1 yard = 0.9144 m
- 1 mile = 1.609 km
- 1 km = 0.6214 miles
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Use the swap button to quickly reverse a conversion. Results update in real time as you type, so there is no need to press a button.
Frequently Asked Questions
How accurate are the conversions?
All conversions use standard mathematical formulas and are accurate to multiple decimal places. The tool handles IEEE 754 floating-point precision for reliable results.
What unit categories are supported?
We support 6 categories: Length (mm, cm, m, km, in, ft, yd, mi), Weight (mg, g, kg, oz, lb, ton), Temperature (°C, °F, K), Area (m², km², ft², mi², acre, hectare), Volume (ml, L, gal, qt, pt, cup, fl oz), and Speed (m/s, km/h, mph, knots).
How do I convert Celsius to Fahrenheit?
Select Temperature category, enter the value in Celsius, and the Fahrenheit equivalent is calculated instantly. The formula is: °F = (°C × 9/5) + 32.