Convert between different units of measurement with precision. Simple, accurate, and comprehensive unit conversion for multiple categories.
Convert between different units of measurement with precision
Convert between different units by selecting a category, input unit, and output unit.
Converted Result
Conversion Formula: 1 meter = 3.28084 feet
Length measurement has ancient origins, with early units based on human body parts (foot, cubit, inch). The meter was defined during the French Revolution as one ten-millionth of the distance from the North Pole to the Equator. Today, it's precisely defined in terms of the speed of light. The imperial system (feet, inches, miles) is still used in the United States, while most countries have adopted the metric system (meters, kilometers).
1 inch = 2.54 centimeters
1 foot = 0.3048 meters
1 yard = 0.9144 meters
1 mile = 1.60934 kilometers
All length conversions use the metric system as a base, with each unit having a fixed conversion rate to meters.
The world uses several measurement systems, primarily:
Conversions between units require specific factors or formulas:
There are several approaches to unit conversion:
Unit conversions are typically grouped by measurement type:
Find answers to common questions about Online Calculator.
A unit converter is a tool that helps you convert values from one measurement unit to another, such as length, weight, temperature, speed, and more.
Select the category (e.g., length, weight), choose the units you want to convert from and to, enter the value, and get the result instantly.
You can convert various units such as length (meters to feet), weight (kilograms to pounds), volume (liters to gallons), temperature (Celsius to Fahrenheit), and more.
Our converter uses precise conversion factors defined by international standards. For most everyday purposes, calculations are accurate to many decimal places. However, in scientific or engineering contexts where extreme precision is required, specialized tools might be necessary. Also note that some conversions (like volume to weight) depend on the substance being measured.
Yes, some categories allow bulk conversions, where you can see multiple unit equivalents at the same time.
Yes, our Unit Converter is completely free and accessible online anytime.
Yes, it supports both metric (e.g., meters, kilograms) and imperial (e.g., feet, pounds) measurement systems.
Different measurement systems evolved independently across civilizations. The metric system was created during the French Revolution to standardize measurements. The imperial system evolved from traditional English units. Today, most countries use the metric system (SI units), while the United States still primarily uses customary units for everyday measurements.
Use these formulas: - °F = (°C × 9/5) + 32 (Celsius to Fahrenheit) - °C = (°F - 32) × 5/9 (Fahrenheit to Celsius) - K = °C + 273.15 (Celsius to Kelvin)
Yes, our Unit Converter is mobile-friendly and works on smartphones, tablets, and desktops.
Mass is a measure of the amount of matter in an object, while weight is the force of gravity acting on that mass. On Earth, we often use these terms interchangeably, but they're different physical quantities. Mass is measured in kilograms (or pounds in the imperial system), while weight is technically a force measured in newtons. When you convert between pounds and kilograms, you're converting between units of mass.
Temperature scales have different zero points and different interval sizes. Celsius and Kelvin have the same size degree but different zero points (0°C = 273.15K). Fahrenheit has both a different zero point and a different scale (each Celsius degree equals 1.8 Fahrenheit degrees). This is why temperature conversions require both multiplication and addition/subtraction, unlike most other unit conversions that use simple multiplication.
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