Unit Converter
Convert between different units of measurement instantly
Common Length Conversions
Common Weight Conversions
Common Temperature References
Common Volume Conversions
Common Area Conversions
How to Use the Unit Converter
Quick Start Guide
- Select Category: Choose from Length, Weight, Temperature, Volume, or Area at the top
- Enter Value: Type the number you want to convert in the "From" field
- Choose Units: Select your starting unit and target unit from the dropdown menus
- See Results: The conversion happens instantly as you type!
- Swap Units: Click the button to quickly reverse your conversion direction
Pro Tips
- Instant Results: All conversions happen automatically as you type - no need to click a button
- High Precision: Results are accurate to 6 decimal places for scientific and technical work
- Swap Feature: Use the circular arrow button () to instantly reverse your conversion
- Reference Examples: Check the "Common Conversions" section below each converter for quick reference
- Bookmarking: Bookmark frequently used conversions by adding them to your browser favorites
- Mobile-Friendly: Works perfectly on smartphones and tablets for on-the-go conversions
- No Limits: Convert as many times as you want - there are no usage restrictions
Common Use Cases
For Students
Convert metric to imperial units for homework, science projects, and math problems. Essential for understanding international measurements in textbooks.
For Travelers
Understand temperatures (Celsius vs Fahrenheit), distances (km vs miles), and weights (kg vs pounds) when traveling internationally.
For Professionals
Quick conversions for international business, engineering projects, construction plans, and technical specifications across different measurement systems.
For Home Cooks
Convert recipe measurements between metric and imperial - cups to milliliters, Fahrenheit to Celsius for oven temperatures, grams to ounces for ingredients.
For Fitness
Track weight in different units (kg vs pounds), measure distances for running (miles vs kilometers), and understand nutrition labels from different countries.
For Real Estate
Convert property sizes between square feet, square meters, and acres. Perfect for international property listings and comparisons.
Frequently Asked Questions
Q: How accurate are the conversions?
A: Our conversions are accurate to 6 decimal places using industry-standard conversion factors. For most everyday use cases, this level of precision exceeds requirements. However, for critical applications (medical, legal, engineering), we recommend verifying with professional-grade instruments.
Q: Why does my result have so many decimal places?
A: We display up to 6 decimal places for maximum accuracy. Trailing zeros are automatically removed. For practical use, you can round to the number of decimal places you need. For example, 2.5400013 feet can be rounded to 2.54 feet.
Q: Can I convert negative numbers or decimals?
A: Yes! You can enter any number including negative values (important for temperatures below zero) and decimal values for precise measurements. The converter handles all real numbers.
Q: What's the difference between the temperature scales?
A: Celsius (C) is used in most countries worldwide and in science. Water freezes at 0C and boils at 100C. Fahrenheit (F) is used primarily in the United States. Water freezes at 32F and boils at 212F. Kelvin (K) is the SI base unit used in scientific work, with absolute zero at 0K (equal to -273.15C).
Q: Why are there different gallons (US vs UK)?
A: Our converter uses US gallons by default. A US gallon equals 3.785 liters, while a UK (Imperial) gallon equals 4.546 liters. This historical difference can cause confusion when reading international recipes or fuel consumption figures.
Q: Is this converter free to use?
A: Yes, absolutely! All our tools are 100% free with no registration required, no hidden fees, and no usage limits. We support the site through non-intrusive advertising.
Q: Do you store my conversion data?
A: No. All conversions happen entirely in your browser using JavaScript. We never send your data to our servers, and we don't store any conversion history. Your privacy is completely protected.
Q: Can I use this offline?
A: Once the page loads, all conversions work offline since they're processed in your browser. However, you need an internet connection to initially load the page. We're working on a Progressive Web App (PWA) version that will work fully offline.
Q: What if I need to convert a unit that's not listed?
A: We include the most commonly used units for each category. If you need a specific unit that's not available, please contact us through our contact page. We regularly add new units based on user requests.
Q: Can I link to a specific conversion?
A: Currently, the converter starts with default settings. We're working on adding URL parameters so you can share links to specific conversions. This feature will be available soon!
Understanding Units of Measurement
Length & Distance
Length is one of the most fundamental measurements. The metric system (meters, centimeters, kilometers) is used by most countries worldwide and in scientific work. The imperial system (inches, feet, yards, miles) is primarily used in the United States, United Kingdom, and a few other countries.
Key conversions to remember: 1 inch = 2.54 cm (exact), 1 foot = 30.48 cm, 1 meter 3.28 feet, 1 mile 1.609 kilometers.
Weight & Mass
Weight and mass are often used interchangeably in everyday conversation, though technically they're different concepts. The metric system uses kilograms and grams, while the imperial system uses pounds and ounces. In the UK, stones are also commonly used for body weight.
Key conversions: 1 kilogram 2.205 pounds, 1 pound = 16 ounces, 1 stone = 14 pounds, 1 ton (metric) = 1000 kg.
Temperature
Temperature scales measure how hot or cold something is. Celsius is used by most countries and in scientific work. Fahrenheit is primarily used in the United States. Kelvin is used in scientific and engineering applications, especially when dealing with absolute temperatures.
Important points: Water freezes at 0C/32F/273.15K and boils at 100C/212F/373.15K. Normal human body temperature is about 37C or 98.6F. Comfortable room temperature is around 20-22C or 68-72F.
Volume & Capacity
Volume measures the amount of space occupied by a liquid or gas. The metric system uses liters and milliliters, while the imperial system uses gallons, quarts, pints, cups, and fluid ounces. Recipe conversions often require volume measurements.
Kitchen conversions: 1 cup 240 ml, 1 tablespoon 15 ml, 1 teaspoon 5 ml, 1 US gallon 3.785 liters.
Area
Area measures two-dimensional space and is expressed in square units. Common uses include measuring land, property, floor space, and countries. Large areas use acres (imperial) or hectares (metric).
Property measurements: 1 acre 4047 square meters 43,560 square feet, 1 hectare = 10,000 square meters 2.47 acres, 1 square meter 10.76 square feet.
