Unit Converters Runs in browser Popular Updated 01 Apr 2026

Unit Converter

Convert length, weight, temperature, data storage, speed, area, volume, and time units instantly. Metric and imperial.

Quick:

From

1 km = 0.621371 mi

Enter a number above to see the conversion.

Quick Reference

1 km0.621371 mi

5 km3.10686 mi

10 km6.21371 mi

100 km62.1371 mi

1000 km621.371 mi

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How to use Unit Converter

Select a unit category

Click one of the eight category tabs — Length, Weight, Temperature, Data, Speed, Area, Volume, or Time.
Choose your source and target units

Pick the source unit from the left dropdown and the target unit from the right dropdown. Click the swap button (⇄) to reverse the direction.
Enter your value

Type any number into the input field. The converted result appears instantly as you type — no button press needed.
Copy the result

Click the copy icon next to the result to copy it to your clipboard. The conversion formula is shown below for reference.

Unit Converter FAQ

How do I convert kilometres to miles?

Select Length, set the left unit to km and the right to mi, then type your value. 1 km = 0.621371 miles. Use the swap button to reverse the direction.

How do I convert Celsius to Fahrenheit?

Select Temperature, set the left unit to °C and the right to °F. The formula °F = (°C × 9/5) + 32 is shown below the result. For example, 100°C = 212°F.

What is the difference between KB and KiB?

KB (kilobyte) uses decimal prefix: 1 KB = 1,000 bytes. KiB (kibibyte) uses binary prefix: 1 KiB = 1,024 bytes. Hard drive manufacturers use decimal (KB), while OS file managers often report binary (KiB). Toggle between modes in the Data Storage category.

How do I convert kg to lbs?

Select Weight, set left to kg and right to lb. 1 kg = 2.20462 lbs. For example, 70 kg = 154.32 lbs.

How do I convert mph to km/h?

Select Speed, set left to mph and right to km/h. 1 mph = 1.60934 km/h. For example, 60 mph = 96.56 km/h.

Can I convert acres to hectares?

Yes — select Area, choose acre on the left and hectare on the right. 1 acre = 0.404686 hectares. 1 hectare = 2.47105 acres.

How many litres are in a US gallon?

Select Volume, set left to US gal and right to L. 1 US gallon = 3.78541 litres.

How do I convert seconds to hours?

Select Time, set left to s (seconds) and right to hr. 1 hour = 3,600 seconds — so 7,200 seconds = 2 hours.

Is this converter accurate?

All conversion factors are based on exact SI definitions. Temperature conversions use exact formulae. Digital storage uses exact powers of 10 (decimal) or 2 (binary). Results are shown to up to 6 significant figures.

Does it work offline?

All conversions happen in your browser — no server is involved. Once the page loads, you can use it without an internet connection.

Background

The Kordu Unit Converter handles every common measurement conversion in one place across 8 categories and 80+ unit pairs. Switch between metric and imperial for length, mass, and volume, convert temperatures between all three scales, or handle digital storage in both decimal (SI) and binary (IEC) modes.

Length — millimetres, centimetres, metres, kilometres, inches, feet, yards, miles, and nautical miles. Perfect for distances, dimensions, or screen sizes.

Weight & Mass — milligrams, grams, kilograms, metric tonnes, ounces, pounds, stone, and US tons. Covers cooking measurements through shipping weights.

Temperature — Celsius, Fahrenheit, and Kelvin with exact formula display.

Digital Storage — bytes through petabytes in both decimal (1 KB = 1000 bytes) and binary (1 KiB = 1024 bytes) modes. Essential for comparing file sizes and storage specs.

Speed — metres per second, km/h, mph, knots, and feet per second.

Area — square millimetres through square miles, plus acres and hectares.

Volume — millilitres through cubic metres, US gallons, quarts, pints, cups, fluid ounces, and cubic feet.

Time — milliseconds through years.

Results update instantly as you type. The conversion formula is shown below the result for reference. All conversions happen in your browser — no server involved.

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