Convert length, weight, temperature, volume, and area
Unit conversion works by multiplying or dividing by a known conversion factor. For example, 1 mile equals 1.60934 kilometers, so to convert miles to kilometers, multiply by 1.60934. The converter stores hundreds of precise conversion factors and chains them together when direct factors aren't available, ensuring accurate results every time.
Different countries and industries use different measurement systems. The United States primarily uses imperial units (feet, pounds, Fahrenheit) while most of the world uses metric (meters, kilograms, Celsius). Scientists use SI units universally. Accurate conversion prevents errors in cooking, engineering, medicine, and international trade.
The metric system is based on powers of 10 (kilo = 1000, centi = 0.01, milli = 0.001), making conversions within the system straightforward. The imperial system uses irregular ratios (12 inches per foot, 3 feet per yard, 5280 feet per mile). Understanding both systems is valuable for travel, science, and everyday calculations.
Always double-check which unit you're converting from and to—confusing them is a common mistake. For temperature, remember that Celsius and Fahrenheit use formulas, not simple multiplication. When precision matters (science, medicine), use the full conversion factor rather than rounded values. Keep significant figures consistent with your original measurement.
To convert Celsius to Fahrenheit: F = (C × 9/5) + 32. For example, 20°C = (20 × 9/5) + 32 = 68°F. Our calculator handles this automatically.
Metric uses meters, kilograms, and liters (used globally). Imperial uses feet, pounds, and gallons (used mainly in the US). Our converter handles both systems.
One meter equals approximately 3.281 feet. Conversely, one foot equals about 0.3048 meters. Our calculator provides precise conversions.