Unit Converter
Convert between metric and imperial units instantly. Length, weight, temperature, volume, area, speed, time, and digital storage conversions.
Length Conversion
Meters
Kilometers
1 Meters equals
0.001 km
Common Conversions
Our comprehensive unit converter handles all common unit conversion needs. Whether you're working with metric or imperial units, need to convert temperature between Celsius and Fahrenheit, or calculate digital storage equivalents, our tool provides instant, accurate results. Perfect for students, engineers, travelers, and anyone working across different measurement systems.
When to Use This Tool
- Converting between metric and imperial units for international projects
- Cooking measurements when following recipes from different countries
- Engineering calculations requiring consistent unit systems
- Travel: understanding weather temperatures in different countries
- E-commerce: displaying product dimensions in preferred units
- Construction: converting between feet/meters and kg/lbs
- Academic: physics and chemistry unit conversions for problem-solving
How to Use
Basic Unit Conversion
- Select the category (Length, Weight, Temperature, etc.)
- Choose the unit you want to convert FROM
- Choose the unit you want to convert TO
- Enter the value in the input field
- View the converted result instantly
Common Conversions Quick Reference
- 1 inch = 2.54 cm = 25.4 mm
- 1 foot = 30.48 cm = 0.3048 meters
- 1 pound = 0.4536 kg = 453.6 grams
- 1 oz = 28.35 grams
- 1 gallon (US) = 3.785 liters
- 1 kg = 2.205 pounds
- C to F: (C × 9/5) + 32
- F to C: (F - 32) × 5/9
Examples
Length Conversion
Common for understanding screen sizes, TV dimensions, or body measurements
Input
100 inches
Result
254 cm | 2.54 m | 8.33 ft | 2.78 yd
Temperature Conversion
Useful for understanding weather or setting thermostat in different countries
Input
25°C (Room Temperature)
Result
77°F | 298.15K | 477.87°R
Weight Conversion
Common for body weight, luggage weight, or shipping calculations
Input
150 pounds
Result
68.04 kg | 68,038.6 g | 10.71 stone (UK)
Frequently Asked Questions
What's the difference between US customary units and imperial units?
US customary units and imperial units share the same names but have slightly different definitions for some measurements (like gallons). The US gallon is smaller than the UK imperial gallon. For most practical purposes, US customary units are what Americans use daily.
Why does the UK still use imperial units?
The UK officially metricated but imperial units remain common in everyday use. Road signs use miles, people use feet and inches for height, and pints for beer. The EU allowed continued imperial use in the UK even during membership.
What's the advantage of metric units?
Metric is a decimal system - all conversions are powers of 10 (1000g = 1kg, 100cm = 1m). Imperial units have arbitrary conversion factors (12 inches = 1 foot, 5280 feet = 1 mile). This makes metric easier for calculations.
Why do Americans still use Fahrenheit?
Fahrenheit was developed in the US and stuck around. It's actually more precise for everyday temperatures (0-100°F covers typical outdoor temps well) and avoids negative temperatures for normal weather. Celsius is better for science.
How accurate are these conversions?
We use standard conversion factors with high precision. For most everyday purposes, 6+ decimal places of accuracy is more than sufficient. Very precise scientific applications may need to account for measurement tolerances.
Pro Tips
- •Use exact conversions: 1 inch = 2.54 cm (defined by international agreement)
- •For cooking: 1 cup = 236.6 ml (US) but 1 cup = 284.1 ml (UK/Australia)
- •Digital storage: actual capacity is slightly less than advertised (1TB = 931 GB usable)
- •Temperature conversions: use formulas for accuracy, don't rely on mental estimates
- •When in doubt, convert to the base unit (meters, grams, liters) first, then to target unit
- •Nautical miles (1852m) are different from statute miles (1609m) - used in aviation/shipping
- •PSI (pounds per square inch) is common for tire pressure; 1 bar ≈ 14.5 PSI