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Unit Converter
Convert length, weight, temperature, speed, area, volume, time, data, energy and more — instantly as you type.
✓ 100% Free
✓ 15+ Categories
✓ Live Conversion
✓ Formula Display
✓ Conversion History
✓ No Signup
📖 How It Works
How to Convert Units Online
Fast, accurate unit conversion in 4 simple steps.
Step 01
🗂️Select Category
Choose from 15 categories: Length, Weight, Temperature, Speed, Area, Volume, Time, Data, Energy, Pressure, Power, Angle, Fuel, and more.
Step 02
🔢Enter Value
Type the number you want to convert. Results update instantly as you type — no button click needed.
Step 03
🔄Select Units
Choose From and To units from the dropdowns. Or use Quick Presets for the most common conversions. Swap units with one click.
Step 04
📋Copy & Use
Copy the result to clipboard, save to history, or scroll down to see the value in all available units at once.
📊 Popular Conversions
Most Searched Unit Conversions
Quick reference for the most commonly needed unit conversions.
| Category | Convert From → To | Result | Formula |
|---|
| Length | 1 Kilometer → Miles | 0.621371 mi | × 0.621371 |
| Length | 1 Meter → Feet | 3.28084 ft | × 3.28084 |
| Length | 1 Inch → Centimeters | 2.54 cm | × 2.54 |
| Weight | 1 Kilogram → Pounds | 2.20462 lb | × 2.20462 |
| Weight | 1 Pound → Kilograms | 0.453592 kg | × 0.453592 |
| Temperature | 100°C → Fahrenheit | 212°F | (C × 9/5) + 32 |
| Temperature | 98.6°F → Celsius | 37°C | (F − 32) × 5/9 |
| Speed | 1 km/h → mph | 0.621371 mph | × 0.621371 |
| Data | 1 GB → MB | 1024 MB | × 1024 |
| Area | 1 Acre → sq meters | 4046.86 m² | × 4046.86 |
| Volume | 1 Liter → US Gallons | 0.264172 gal | × 0.264172 |
| Time | 1 Hour → Seconds | 3600 s | × 3600 |
💡 Use Cases
Who Needs Unit Conversion?
Unit conversion is needed daily across many fields and everyday tasks.
🌍Travel & Navigation
Convert miles to km for road trips, Fahrenheit to Celsius for weather, and pounds to kg for baggage allowances.
🍳Cooking & Recipes
Convert cups to liters, ounces to grams, and Fahrenheit oven temps to Celsius for international recipes.
🏗️Construction & Engineering
Convert meters to feet, square meters to square feet, and liters to gallons for construction projects.
💻Tech & Computing
Convert GB to MB to TB, bits to bytes, and data transfer speeds for storage and networking calculations.
🏋️Fitness & Health
Convert kg to pounds for weight tracking, km to miles for running distances, and calories to kilojoules.
🎓Science & Education
Convert SI and imperial units for physics, chemistry, and math problems. Check formulas instantly.
❓ FAQ
Frequently Asked Questions
Common questions about unit conversion.
How many kilometers in a mile? ▼
1 mile = 1.60934 kilometers. Conversely, 1 kilometer = 0.621371 miles. The conversion factor is based on the international definition of the mile as exactly 1.609344 km.
How to convert Celsius to Fahrenheit? ▼
The formula is: °F = (°C × 9/5) + 32. For example, 0°C = 32°F (freezing), 100°C = 212°F (boiling), and 37°C = 98.6°F (human body temperature). To convert Fahrenheit to Celsius: °C = (°F − 32) × 5/9.
How many grams in an ounce? ▼
1 ounce (oz) = 28.3495 grams. 1 pound = 16 ounces = 453.592 grams = 0.453592 kg. These conversions are useful for cooking, shipping, and fitness tracking.
How many MB in a GB? ▼
1 GB (Gigabyte) = 1024 MB (Megabytes) in binary (IEC standard), or 1000 MB in decimal (SI standard). Storage manufacturers typically use decimal (1000), while operating systems usually display binary (1024), which is why a 1TB drive shows as ~931 GB in Windows.
How many feet in a meter? ▼
1 meter = 3.28084 feet. 1 foot = 0.3048 meters. 1 inch = 2.54 centimeters. These exact values are defined by the international yard and pound agreement of 1959.
What is the difference between mass and weight? ▼
Mass is the amount of matter in an object, measured in kilograms (kg). Weight is the gravitational force on that mass, measured in Newtons (N). In everyday usage, "weight" (kg, pounds) typically refers to mass. On the Moon, your mass stays the same but your weight (N) is about 1/6th of Earth's.
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