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Convert length and weight units instantly — km, m, inch, kg, pound and more.
| 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 |
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.
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.
Most of the world uses the metric system, born in revolutionary France in the 1790s around a metre defined as one ten-millionth of the distance from the equator to the pole, and today's SI units are defined from fixed constants of nature. The USA still uses customary units inherited from the British imperial system, which is why recipes, engineering drawings, and news differ across borders.
Conversions are exact by international agreement: 1 inch = 2.54 cm exactly (not approximately — it was fixed by treaty in 1959), 1 mile = 1.609344 km, and 1 kg = 2.20462 lb. Our converter uses these exact definitions, so results are safe for school work and general professional use.
India is officially metric yet comfortably bilingual in units. Height is quoted in feet and inches, body weight in kilograms, gold in grams and tola (1 tola = 11.6638 grams), land in acres, bigha, guntha and cents depending on the state — one bigha means different areas in different states — and petrol in litres while distances are in kilometres.
When a value is legal or financial — property area, jewellery weight, export quantities — always confirm which unit convention the document uses, because regional units like bigha vary by 25-100% between states. Metric is the safe common ground, which is what this converter works in.
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