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Free Unit Converter | Convert Length, Weight, Temperature & More Online
Convert between different units of measurement instantly with our free online unit converter tool. Convert length (meters, feet, inches, miles), weight (kilograms, pounds, grams, ounces), temperature (Celsius, Fahrenheit, Kelvin), area, volume, speed, and time. Perfect for students, professionals, and everyday use. No registration required, 100% free, and works entirely in your browser.
Key Features of Our Unit Converter
- Length Conversion - Meters, kilometers, feet, inches, miles, centimeters
- Weight Conversion - Kilograms, pounds, grams, ounces, tons
- Temperature Conversion - Celsius, Fahrenheit, Kelvin
- Area Conversion - Square meters, square feet, acres
- Volume Conversion - Liters, milliliters, gallons
- Speed Conversion - km/h, mph, m/s
- Time Conversion - Seconds, minutes, hours, days
- Metric to Imperial - Convert between metric and imperial units
- Swap Conversion - Reverse conversion direction with one click
- Copy to Clipboard - One-click copy of conversion results
- High Precision - Results accurate to 6 decimal places
- Privacy First - All processing happens locally in your browser
- 100% Free - No watermarks, no premium tiers
- No Registration - Use instantly without signup
- Offline Support - Works without internet connection
Understanding Unit Conversions
Length Units
Length conversions are essential for construction, travel, and everyday measurements. Convert between metric units (meters, kilometers, centimeters) and imperial units (feet, inches, miles). Key conversions: 1 meter = 3.28084 feet, 1 kilometer = 0.621371 miles, 1 inch = 2.54 centimeters.
Weight Units
Weight conversions are crucial for cooking, shipping, and fitness. Convert between kilograms, pounds, grams, and ounces. Key conversions: 1 kilogram = 2.20462 pounds, 1 pound = 453.592 grams, 1 ounce = 28.3495 grams.
Temperature Units
Temperature conversions are used in weather, cooking, and science. Convert between Celsius, Fahrenheit, and Kelvin. Key formulas: °F = (°C × 9/5) + 32, °C = (°F - 32) × 5/9, K = °C + 273.15.
Common Use Cases for Unit Conversion
- Travel & Navigation - Convert kilometers to miles for road trips
- Cooking & Baking - Convert grams to ounces for recipes
- Fitness & Health - Convert kilograms to pounds for weight tracking
- Construction - Convert meters to feet for building projects
- Weather & Climate - Convert Celsius to Fahrenheit for temperature
- Science & Education - Convert between all units for experiments
Unit Converter
Convert between different units of measurement including length, weight, temperature, area, volume, speed, and time. Fast, accurate, and easy to use.
Unit Converter
Select conversion type, enter value, and get instant results.
Length Converter
Meters, feet, inches, miles, kilometers
Privacy Focused
Your data never leaves your device.
Instant Results
Real-time conversion as you type.
Free Forever
Completely free with no registration.
How to Use Unit Converter - Complete Guide
Select Conversion
Choose the type of conversion you need from the dropdown menu.
Enter Value
Type the number you want to convert into the input field.
Get Result
Click convert to see the result and copy it if needed.
Common Conversion Formulas
Length
1 km = 0.621371 miles
1 meter = 3.28084 feet
1 inch = 2.54 cm
Weight
1 kg = 2.20462 pounds
1 pound = 0.453592 kg
1 ounce = 28.3495 grams
Temperature
°F = (°C × 9/5) + 32
°C = (°F - 32) × 5/9
K = °C + 273.15
Speed
1 km/h = 0.621371 mph
1 m/s = 3.6 km/h
1 knot = 1.852 km/h
Quick Unit Conversion Reference
| From | To | Multiply By |
|---|---|---|
| Meters | Feet | 3.28084 |
| Kilometers | Miles | 0.621371 |
| Kilograms | Pounds | 2.20462 |
| Celsius | Fahrenheit | × 9/5 + 32 |
| Liters | Gallons | 0.264172 |
| km/h | mph | 0.621371 |
Frequently Asked Questions
What unit categories are supported?
Length, weight, temperature, area, volume, speed, and time units are fully supported.
How accurate are the conversions?
All conversions use standard international unit definitions and are accurate to 6 decimal places.
Can I convert between metric and imperial?
Yes, all major metric and imperial units are supported for easy conversion.
Is my data stored?
No! All conversions happen directly in your browser. Your data never leaves your device.
Can I convert negative numbers?
Yes, negative numbers are supported for temperature conversions and other applicable units.
Can I use this tool offline?
Yes! Once the page loads, our Unit Converter works completely offline. Perfect for when you don't have an internet connection.
Why Use Our Unit Converter?
50+ Conversions
Length, weight, temperature, area, volume, speed, time.
High Precision
Results accurate to 6 decimal places.
Instant Results
Real-time conversion as you type.
Free Forever
Completely free with no registration.
Cross-Platform
Works on Windows, Mac, Linux, iOS, and Android.
No Registration
Use instantly without signing up.
Pro Tips for Unit Conversion
- • Use the swap button to quickly reverse conversion direction
- • Copy results directly to use in calculations or documents
- • For temperature, remember freezing point: 0°C = 32°F = 273.15K
- • For speed, 100 km/h ≈ 62 mph for quick estimates while driving
- • For weight, 1 kg ≈ 2.2 lbs for quick grocery conversions
- • For length, 1 meter ≈ 3.3 feet for quick construction estimates
Unit Converter | Length | Weight | Temperature | Area | Volume | Speed | Time
Processing: 100% client-side • High precision (6 decimal places) • Complete privacy
Supported: Metric & Imperial units • All major measurement categories
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