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Unit Converter

Convert length and weight units instantly — km, m, inch, kg, pound and more.

Category Value From To

How to use the Unit Converter

Choose the Category — Length or Weight.
Enter the Value and pick the From and To units.
The result updates live every time you switch units.

Conversions people search for most

From	To	Result
5 km	miles	3.10686 mi
1 mile	km	1.60934 km
5'7" (5 ft 7 in)	cm	170.18 cm
6 feet	cm	182.88 cm
70 kg	lb	154.32 lb
1 pound	kg	0.453592 kg
100 kg	lb	220.46 lb

Exact factors used

The converter uses international standard definitions: 1 inch = 2.54 cm exactly, 1 foot = 30.48 cm, 1 yard = 0.9144 m, 1 mile = 1,609.344 m, 1 pound = 0.45359237 kg and 1 ounce = 28.349523 g. These are the legal definitions used in trade and science worldwide, so results match official conversions.

Where conversions trip people up

Forms asking cm when you think in feet: multiply feet by 30.48 and add inches × 2.54.

Gym plates in lb on machines calibrated in kg: 45 lb ≈ 20.4 kg — close enough that many gyms treat 45 lb plates as 20 kg (they are not equal; precision matters in competition).

Running pace: a 5K is 3.107 miles. Treadmills showing mph: 6 mph = 9.66 km/h.

Frequently asked questions

How many cm is 5'7"?

5 feet 7 inches = (5 × 30.48) + (7 × 2.54) = 170.18 cm. Type 170.18 anywhere cm is asked.

How do I convert kg to pounds?

Multiply kg by 2.20462. Example: 70 kg × 2.20462 ≈ 154.3 lb. Going the other way, multiply pounds by 0.453592.

Which is longer — a mile or a kilometre?

A mile. 1 mile = 1.60934 km, so a 10-mile run is about 16.1 km.

Are these conversions exact?

Yes — the converter uses the internationally defined exact factors, not rounded approximations.

Does it convert temperature or volume?

Not yet — this page covers length and weight. More categories are being added.

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