Conversion ratios are fixed by international definition: 1 inch = 2.54 cm, 1 kg = 2.20462 lb, 1 mile = 1.60934 km, 1 meter = 3.28084 ft, and temperature converts as °F = °C × 9/5 + 32. For example: 254 cm = 100 inches, 70 kg = 154.3 lb, and 100°C = 212°F.
How is it calculated?
Pick a conversion type, enter a value, and the calculator multiplies or divides by the fixed ratio: cm to inches divides by 2.54 (the reverse multiplies), kg to lb multiplies by 2.20462, km to miles divides by 1.60934, and meters to feet multiplies by 3.28084. Temperature is the exception — not a simple multiplication but a formula: Celsius to Fahrenheit multiplies by 9/5 and adds 32; the reverse subtracts 32 and multiplies by 5/9.
Examples: 254 cm ÷ 2.54 = 100 inches; 70 kg × 2.20462 = 154.3 lb; 100°C × 9/5 + 32 = 212°F. Good to know: the ratios are exact international definitions (the inch has been defined as exactly 2.54 cm since 1959), and results are rounded for readability. With temperature, note the scales have different zero points — 0°C equals 32°F, not 0°F.
Frequently asked questions
How many centimeters are in an inch?
One inch equals exactly 2.54 cm — a fixed international definition since 1959, so 254 cm = 100 inches. The most common use in Israel is screens: TV and monitor sizes are diagonal measurements in inches, so a 55-inch screen is about 140 cm across.
Does Israel use the metric system?
Yes — Israel uses metric units: cm, kg, km and degrees Celsius. US units mostly show up in imported products and services: screens are measured in inches, gym weights and baggage on US flights in pounds (a common limit is 50 lb = 22.7 kg), and American weather forecasts in Fahrenheit.
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 (that is, by 1.8) and add 32. For example: 100°C × 1.8 + 32 = 212°F, and 0°C = 32°F. To go the other way, subtract 32 and multiply by 5/9. It is the only conversion that is not a simple multiplication, because the two scales have different zero points.
This calculation is a general estimate for illustration only. It does not constitute tax, pension, or investment advice, nor a substitute for personal advice from a licensed professional, and should not be relied on for decisions.
