Frequently Asked Questions
How do I convert kilometers to miles?
Multiply kilometers by 0.621371 to get miles. For example, 10 km × 0.621371 = 6.21 miles. Going the other direction, multiply miles by 1.60934 to get kilometers. A quick mental shortcut: 5 miles ≈ 8 km.
How do I convert Celsius to Fahrenheit?
Use the formula: °F = (°C × 9/5) + 32. So 20°C = (20 × 1.8) + 32 = 68°F. To convert Fahrenheit to Celsius: °C = (°F − 32) × 5/9. A useful benchmark: 0°C = 32°F, 100°C = 212°F, and body temperature is 37°C = 98.6°F.
How many pounds are in a kilogram?
One kilogram equals approximately 2.20462 pounds. To convert kg to pounds, multiply by 2.205. To convert pounds to kg, divide by 2.205 (or multiply by 0.453592). For example, 70 kg ≈ 154 pounds; 150 pounds ≈ 68 kg.
How many megabytes are in a gigabyte?
In binary (used by computers): 1 GB = 1,024 MB. In decimal (used by storage manufacturers): 1 GB = 1,000 MB. This is why a 128 GB USB drive shows up as 119 GB on your computer — the OS reports in binary while the manufacturer labels in decimal.
What is the difference between metric and imperial units?
The metric system (SI) uses units based on powers of 10 — meters, kilograms, liters. It's used by most of the world and all of science. The imperial system uses units like inches, feet, pounds, and gallons — still common in the US, UK (partially), and a few other countries. Metric is generally easier to calculate with due to its base-10 structure.