Unit Converter
Convert between units
Unit Converter
Convert between 6 different unit types
Converted Result
About Unit Converter
Our free unit converter handles all common unit conversions: length (meters to feet, km to miles), weight (kg to lbs, grams to ounces), volume (liters to gallons), temperature (Celsius to Fahrenheit), area (square feet to acres), and speed (km/h to mph).
Perfect for students, engineers, travelers, cooks, and anyone needing quick, accurate unit conversions. Supports both metric and imperial systems with high precision (6 decimal places). The converter uses the most common US customary units for volume and other measurements.
With 6 conversion types and support for over 30 different units, this is the most comprehensive unit conversion tool you'll find. All conversions are processed client-side for instant results without internet delays.
How to Use This Unit Converter
Step 1: Select the conversion type (Length, Weight, Volume, Temperature, Area, or Speed).
Step 2: Enter the value you want to convert.
Step 3: Select the "From" unit (your current unit).
Step 4: Select the "To" unit (your target unit).
Step 5: Click "Convert" to see the result with 6 decimal precision.
Step 6: Use Reset to clear all inputs and start over.
Why Use a Unit Converter?
✓ Instant Results
Get accurate conversions in real-time. No need for manual calculations or lookup tables. Simply enter values and get results instantly.
✓ 6 Conversion Types
Length, weight, volume, temperature, area, and speed - all in one tool. Switch between types with a single click.
✓ High Precision
Results are displayed with 6 decimal places for maximum accuracy. Perfect for engineering, science, and precise cooking measurements.
✓ Metric & Imperial
Convert between metric (meters, kilograms, liters) and imperial (feet, pounds, gallons) systems. Also handles US customary units.
Quick Reference Conversions
length
weight
volume
temperature
area
speed
Common Conversion Factors
| Category | From | To | Multiply By |
|---|---|---|---|
| Length | 1 inch | cm | 2.54 |
| Length | 1 foot | m | 0.3048 |
| Length | 1 mile | km | 1.609 |
| Weight | 1 lb | kg | 0.4536 |
| Weight | 1 oz | g | 28.35 |
| Volume | 1 gallon | L | 3.785 |
| Volume | 1 cup | ml | 236.588 |
| Area | 1 acre | sq ft | 43,560 |
* These are standard conversion factors. Our calculator uses these exact values for precise conversions.
Metric vs Imperial Guide
📏 Metric System
- • Length: Millimeters, Centimeters, Meters, Kilometers
- • Weight: Milligrams, Grams, Kilograms, Tonnes
- • Volume: Milliliters, Liters, Cubic Meters
- • Temperature: Celsius (°C), Kelvin (K)
- • Used in most countries worldwide
- • Base 10 system (easy to convert)
🇺🇸 Imperial/US Customary
- • Length: Inches, Feet, Yards, Miles
- • Weight: Ounces, Pounds, Tons
- • Volume: Fluid Ounces, Cups, Pints, Quarts, Gallons
- • Temperature: Fahrenheit (°F)
- • Used mainly in USA, Liberia, Myanmar
- • Based on historical measurements
Our converter handles both systems seamlessly. Select any unit from either system and convert instantly.
Unit Converter Tips
- 💡Remember common conversions: 1 inch = 2.54 cm, 1 kg = 2.204 lbs, 1 gallon = 3.785 L. These are useful for quick mental estimates.
- 💡Use the swap button: Click 🔄 to quickly reverse the conversion. Great for checking reciprocal conversions (e.g., mph to km/h and back).
- 💡Temperature tip: -40°C = -40°F (the crossover point). This is a good reference for extreme cold conversions.
- 💡Cooking conversions: 1 cup = 16 tablespoons = 48 teaspoons. Our volume converter handles all cooking measurements.
- 💡Precision matters: Use 6 decimal places for engineering and scientific calculations. For everyday use, 2-3 decimal places are usually sufficient.