Unit Converter Calculator

Convert units instantly across length, weight, temperature, area, volume, speed, time, pressure, energy and more — with accurate results.

No sign-up required Fast results Standards-based Mobile-friendly

🔥 Available Temperature Converters

Celsius to Fahrenheit Fahrenheit to Celsius Celsius to Kelvin Kelvin to Celsius

📦 Basic Converters Available

We have many converters available with basic layouts. They work perfectly for quick conversions, but lack the comprehensive guides, medical references, and enhanced features of our Premium converters.

Note: These will be upgraded one-by-one to Premium quality (like Temperature converters). They may have minimal styling and documentation.

📏 Length Converters Basic - Being Upgraded

CM, Inches, Feet, Meters, KM, Miles, MM, Yards

Available soon with premium features

⚖️ Weight Converters Basic - Being Upgraded

KG, Pounds, Grams, Ounces, Stone

Available soon with premium features

📐 Area Converters Basic - Being Upgraded

Square Meters, Square Feet, Acres, Hectares

Available soon with premium features

🧪 Volume Converters Basic - Being Upgraded

Liters, Gallons, ML, Cups, Cubic Feet

Available soon with premium features

🚗 Speed Converters Basic - Being Upgraded

KM/H, MPH, M/S, Knots

Available soon with premium features

⏰ Time Converters Basic - Being Upgraded

Hours, Minutes, Seconds, Days, Weeks

Available soon with premium features

🔧 Pressure Converters Basic - Being Upgraded

Bar, PSI, KPa, ATM, Pascals

Available soon with premium features

How to Convert Units

  1. Select a category from the options above (e.g., Length, Weight, Temperature).
  2. Choose your converter by clicking on the specific conversion you need.
  3. Enter a value in the input field and get instant results.
  4. Copy or note the converted value for your use.

Note: All our converters use standards-based formulas and conversion factors from NIST and BIPM for maximum accuracy.

Common Unit Conversion Formulas

Celsius to Fahrenheit

°F = (°C × 9/5) + 32

Fahrenheit to Celsius

°C = (°F − 32) × 5/9

Inches to CM

cm = inches × 2.54

KG to Pounds

lb = kg × 2.20462

Meters to Feet

ft = m × 3.28084

KM to Miles

miles = km × 0.621371

Frequently Asked Questions

What is a unit converter?
A unit converter is a tool that changes a measurement from one unit to another using known conversion factors or formulas. For example, converting centimeters to inches, kilograms to pounds, or Celsius to Fahrenheit. Our converters use internationally recognized standards from NIST and BIPM.
Are these unit converters accurate?
Yes, all our converters use standards-based unit definitions and consistent conversion factors from authoritative sources like NIST (National Institute of Standards and Technology) and BIPM (Bureau International des Poids et Mesures). Temperature conversions correctly apply offset formulas.
Why do some converters show slightly different results?
Small differences can occur due to rounding (number of decimal places shown), different unit variants (like binary vs decimal data units), or using approximate factors instead of exact standards. Our converters use exact conversion factors wherever possible.
How do I avoid mistakes in unit conversion?
Always double-check which unit you're converting FROM and TO. Use the same unit system (metric or imperial) throughout a project when possible. Keep adequate decimal precision before rounding. Our converters make this easy by clearly labeling input and output units.
Can I use these converters on mobile devices?
Yes! All our converters are fully responsive and optimized for mobile devices. They work perfectly on smartphones and tablets with touch-friendly inputs and fast loading times.

📚 Measurement Standards & References