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Unit Converter: cm to Inches, kg to lbs, °C to °F and More

Free · No sign-up · Updated October 2026
Convert cm to inches, kg to lbs, °C to °F, litres to gallons and km/h to mph instantly, with every unit at once and a quick reference table.
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cm

Common conversions

170 cm in inches

66.9291 in

5 ft 6.9 in1 cm = 0.393701 in

170 cm in every unit

Centimetres to inches table

cmin
10.393701
20.787402
51.9685
103.93701
207.87402
5019.685
10039.3701
500196.85
1,000393.701

Conversions use exact definitions: 1 inch = 2.54 cm, 1 pound = 0.45359237 kg, 1 mile = 1.609344 km, 1 US gallon = 3.785411784 litres. Results are rounded to about 6 significant figures.

How this works

Every conversion goes through a base unit (metres, kilograms, litres, metres per second) using exact legal definitions: 1 inch is 2.54 cm, 1 foot is 30.48 cm, 1 mile is 1.609344 km, 1 pound is 0.45359237 kg, 1 ounce is 28.349523125 g and 1 US gallon is 3.785411784 litres. A UK gallon is 4.54609 litres and a nautical mile is 1,852 m.

Temperature is not a simple ratio: °F = °C × 9 ÷ 5 + 32, and kelvin = °C + 273.15. Cooking measures use metric spoons and cups (5 ml teaspoon, 15 ml tablespoon, 250 ml cup), so check whether an American recipe means US cups (about 237 ml).

Results are rounded to about 6 significant figures, which is more precision than any everyday use needs. Heights in centimetres are also shown in feet and inches.

FAQs

How many inches is 170 cm?

170 cm is 66.93 inches, or 5 ft 6.9 in. Divide centimetres by 2.54 to get inches, and divide inches by 12 for feet.

How do I convert kg to lbs?

Multiply by 2.20462. 1 kg is 2.20462 lb, so 65 kg is 143.3 lb. To go the other way, 1 lb is 0.453592 kg.

What is 32 °C in Fahrenheit?

89.6 °F. Multiply by 9, divide by 5 and add 32. Normal body temperature of 37 °C is 98.6 °F.

What is 90 km/h in mph?

55.92 mph. Divide km/h by 1.609344 to get miles per hour.

Sources