Unit Converter
Convert length, weight, temperature, speed, area, volume, and time instantly.
Unit Converter
Quick Conversions
Unit Converter — All Units
A unit converter is an essential tool for students, professionals, travellers, and anyone who works with measurements. Whether you are cooking a recipe that uses cups and ounces, calculating distances in kilometres and miles, or converting temperatures between Celsius and Fahrenheit, a reliable unit converter saves time and eliminates errors. Our free online unit converter supports seven categories — Length, Weight, Temperature, Speed, Area, Volume, and Time — covering every common conversion you will ever need.
Metric vs Imperial System
The two most widely used measurement systems in the world are the metric system and the imperial system. The metric system, also known as the International System of Units (SI), is used by the vast majority of countries worldwide, including India. It is a decimal-based system where units are related by powers of ten. For example, 1 kilometre equals 1,000 metres, and 1 metre equals 100 centimetres. This consistency makes metric conversions straightforward — you simply move the decimal point.
The imperial system, on the other hand, is primarily used in the United States, Liberia, and Myanmar. It uses units such as miles, feet, inches, pounds, and ounces. Conversions within the imperial system are less intuitive — 1 mile equals 5,280 feet, 1 foot equals 12 inches, and 1 pound equals 16 ounces. This irregularity is why a unit converter becomes indispensable when working with imperial measurements.
India officially adopted the metric system in 1957 through the Standards of Weights and Measures Act. However, due to historical ties with the British system and global trade, imperial units still appear in everyday life — screen sizes are measured in inches, aircraft altitude in feet, and body weight is often discussed in pounds. Understanding both systems and being able to convert between them is a practical skill.
Common Conversions
Here are some of the most frequently used unit conversions that people search for:
| Conversion | Formula | Example |
|---|---|---|
| Kilometres to Miles | 1 km = 0.621371 miles | 100 km = 62.14 miles |
| Miles to Kilometres | 1 mile = 1.60934 km | 50 miles = 80.47 km |
| Kilograms to Pounds | 1 kg = 2.20462 lbs | 70 kg = 154.32 lbs |
| Pounds to Kilograms | 1 lb = 0.453592 kg | 150 lbs = 68.04 kg |
| Celsius to Fahrenheit | °F = (°C × 9/5) + 32 | 37°C = 98.6°F |
| Fahrenheit to Celsius | °C = (°F − 32) × 5/9 | 212°F = 100°C |
| Feet to Metres | 1 ft = 0.3048 m | 6 ft = 1.83 m |
| Inches to Centimetres | 1 inch = 2.54 cm | 12 inches = 30.48 cm |
| Litres to Gallons | 1 litre = 0.264172 gal | 10 litres = 2.64 gal |
| Acres to Square Metres | 1 acre = 4,046.86 sq m | 5 acres = 20,234.3 sq m |
These conversions are widely used in education, travel, cooking, construction, and international trade. Bookmark this page for quick access whenever you need a reliable conversion.
Tips for Accurate Conversions
When converting between units, keep a few best practices in mind. First, always double-check which system your source data uses — mixing up metric and imperial is a common mistake. Second, be aware of rounding: while 1 km is approximately 0.621 miles, using a more precise factor (0.621371) yields more accurate results for large values. Third, for temperature conversions, remember that Celsius and Kelvin have the same scale size (a difference of 1°C equals a difference of 1 K), but their zero points differ — 0°C = 273.15 K. Finally, when converting area or volume, remember that the conversion factor is squared or cubed: 1 sq metre is not 0.3048 sq feet, but rather (0.3048)² = 0.0929 sq feet.