Unit Converters Tool

Unit Converter

Convert Length, Weight, and Temperature.

Σ The Formula

1 km = 0.621371 miles | 1 kg = 2.20462 lbs | °F = (°C × 9/5) + 32

Real World Examples

Travel Distance
Converting 100 km to miles: 100 × 0.621371 = 62.14 miles
Body Weight
Converting 70 kg to pounds: 70 × 2.20462 = 154.32 lbs
Cooking Temperature
Converting 180°C to Fahrenheit: (180 × 9/5) + 32 = 356°F
Height Conversion
Converting 6 feet to meters: 6 × 0.3048 = 1.83 meters

# About This Calculator

Unit conversion is essential in our globalized world where different measurement systems coexist. The metric system (meters, kilograms, Celsius) is used by most countries, while the United States primarily uses imperial units (feet, pounds, Fahrenheit). Converting between these systems is crucial for travel, cooking, science, and international communication.

Common conversion needs include: distance for travel planning (kilometers to miles), weight for shipping and health (kilograms to pounds), temperature for weather and cooking (Celsius to Fahrenheit), and height for personal measurements. Each conversion uses a specific multiplication factor or formula.

Length conversions use simple multiplication (1 km = 0.621371 miles, 1 meter = 3.28084 feet). Weight conversions are similar (1 kg = 2.20462 lbs). Temperature is more complex: °F = (°C × 9/5) + 32, or °C = (°F - 32) × 5/9. These formulas account for different zero points and scale sizes.

This calculator handles the most common everyday conversions for length, weight, and temperature. It's perfect for international travel, following recipes from other countries, understanding weather forecasts, or converting measurements for fitness and health tracking.

How To Use

  1. Select category.
  2. Enter value and select units.
  3. Click Convert.

Frequently Asked Questions

Why doesn't the US use the metric system?+

Historical reasons and high conversion costs. The US officially adopted metric in 1975 but implementation was voluntary. Changing road signs, product labels, and industry standards would cost billions. Most US scientific and medical fields do use metric.

What's the easiest way to estimate Celsius to Fahrenheit?+

Quick mental math: Double the Celsius, subtract 10%, add 32. For example, 20°C: 20×2 = 40, minus 4 = 36, plus 32 = 68°F (actual: 68°F). Or remember: 0°C = 32°F, 10°C = 50°F, 20°C = 68°F, 30°C = 86°F.

How do I convert between metric units (km to m, kg to g)?+

Use powers of 10: 1 km = 1,000 m, 1 m = 100 cm, 1 kg = 1,000 g. Just move the decimal point! Going to smaller units, multiply (5 km = 5,000 m). Going to larger units, divide (500 g = 0.5 kg).

What's the difference between weight and mass?+

Mass (kg) is the amount of matter and doesn't change. Weight (lbs/N) is the force of gravity on that mass and varies by location. On Earth, they're often used interchangeably, but on the Moon, your mass stays the same while your weight is 1/6th.

Why is temperature conversion not just multiplication?+

Celsius and Fahrenheit have different zero points and scale sizes. 0°C = 32°F (not 0°F), and each Celsius degree equals 1.8 Fahrenheit degrees. The formula accounts for both the offset (32) and the scale difference (9/5).

Is Unit Converter free to use?+

Yes, Unit Converter on Matheric is completely free to use. We believe in accessible education and utility for everyone.

About

Unit conversion is essential in our globalized world where different measurement systems coexist. The metric system (meters, kilograms, Celsius) is used by most countries, while the United States primarily uses imperial units (feet, pounds, Fahrenheit). Converting between these systems is crucial for travel, cooking, science, and international communication.

Common conversion needs include: distance for travel planning (kilometers to miles), weight for shipping and health (kilograms to pounds), temperature for weather and cooking (Celsius to Fahrenheit), and height for personal measurements. Each conversion uses a specific multiplication factor or formula.

Length conversions use simple multiplication (1 km = 0.621371 miles, 1 meter = 3.28084 feet). Weight conversions are similar (1 kg = 2.20462 lbs). Temperature is more complex: °F = (°C × 9/5) + 32, or °C = (°F - 32) × 5/9. These formulas account for different zero points and scale sizes.

This calculator handles the most common everyday conversions for length, weight, and temperature. It's perfect for international travel, following recipes from other countries, understanding weather forecasts, or converting measurements for fitness and health tracking.

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