Length Converter
Convert between meters, kilometers, miles, feet, inches, yards, and more - instantly.
About the Length Converter
Length conversion is needed daily across engineering, cooking, clothing, construction, and international communication. India officially uses the metric system, but imperial units (feet, inches) persist stubbornly in real estate, informal conversation about heights, and building drawings from older projects. A property described as 30 x 40 feet, a door frame quoted in inches, and a site plan drawn in meters can all coexist on the same construction project.
In everyday Indian life, height is almost universally described in feet and inches despite official metric use - doctors record in centimeters, but people say they are 5 feet 10 inches. Fabric shops sell in meters but US and UK sewing patterns quote yardage. Road signs are in km, but imported vehicle speedometers may show both km/h and mph. This dual-system reality means anyone doing practical work in India regularly needs to convert between the two.
At the global level, length conversion bridges scientific work (nanometers and angstroms), navigation (nautical miles), astronomy (light years), and trade. Manufacturing tolerances are specified in millimeters or thousandths of an inch depending on industry. Understanding length units from microscale to cosmic scale is a fundamental quantitative literacy skill for engineers, scientists, and anyone working across international contexts.
Length Conversion Reference
1 meter = 100 cm = 1,000 mm · 1 inch = 2.54 cm · 1 foot = 30.48 cm · 1 yard = 91.44 cm · 1 mile = 1.609 km
1 nautical mile = 1.852 km · 1 angstrom = 10^-10 m · 1 light year = 9.461 x 10^15 m · Traditional Indian: 1 gaj = 0.914 m (= 1 yard) · 1 kos = approximately 3.2 km
Worked Example
Property plot described as 30 x 40 feet - convert to meters
40 feet = 12.19 m · 30 feet = 9.14 m · Area = 1,200 sq ft = 111.5 sq m
Tips & Insights
- 1
Real estate in India is quoted in square feet but legal documents use square meters - always convert for official filings. 1 sq ft = 0.0929 sq m, so a 1,000 sq ft apartment = 92.9 sq m. Many RERA filings and stamp duty documents require the metric figure.
- 2
Clothing and shoe sizes use centimeters (shoe length) and inches (waist, inseam) interchangeably. A 32-inch waist = 81.3 cm; a size 42 suit (European) corresponds to a chest of 42 inches = 106.7 cm. International size charts typically list both.
- 3
Engineering drawings in India use millimeters for dimensions. To convert inches to mm, multiply by 25.4 exactly. A 1/4-inch bolt = 6.35 mm. For machined parts, tolerances in thousandths of an inch (thou) = 0.0254 mm - precision that matters in manufacturing.
- 4
Fabric in India is sold in metres but US and UK patterns quote yardage. 1 yard = 0.914 m. A pattern requiring 3 yards needs 2.74 m - buy 2.8 m to include a safety margin for cutting, seam allowances, and pattern matching.
- 5
Screen sizes worldwide are quoted in diagonal inches regardless of country. A 15.6-inch laptop screen = 39.6 cm diagonal. For a 16:9 screen at 15.6 inches, the physical dimensions are approximately 34.5 cm wide and 19.4 cm tall - useful for desk and bag sizing.
- 6
Heights in India are informally described in feet and inches but medical records, passports, and driving licenses use centimeters. 5 feet = 152.4 cm; 5 feet 10 inches = 177.8 cm; 6 feet = 182.9 cm. Know your height in cm for all official documentation.
- 7
Road distances in India are always in km. When driving in the UK or USA, speed limits and distances are in miles. 1 mile = 1.609 km; 60 mph = 96.6 km/h; 100 km = 62.1 miles. A UK motorway at 70 mph = 112.7 km/h - just under India's 120 km/h highway limit.
Why this matters for you
Unit confusion in construction and real estate costs real money. A contractor who misreads a dimension in feet as meters, or a buyer who confuses a plot size in gaj with one in square meters, can make decisions with six-figure rupee consequences. The same physical property appears to have very different area depending on the unit - a 1,200 sq ft flat is 111.5 sq m - and knowing both is essential for informed comparison across listings.
For professionals in manufacturing, engineering, and import-export, unit conversion errors have serious consequences. A machining tolerance specified in thousandths of an inch is approximately 0.0254 mm - far more precise than most millimeter readings. Industries that mix metric and imperial specifications (automotive, aerospace, electronics) require engineers to convert fluently and accurately between the two systems without introducing rounding errors that accumulate across tolerances.
India is at a unique point in the global unit transition. Official measurement is metric and has been since 1957, yet informal practice, inherited infrastructure, and software defaults frequently revert to imperial units. A single tool that converts reliably across all common length units removes the friction of this dual-system reality and prevents the measurement errors that silently inflate costs and create misunderstandings in construction, trade, and everyday transactions.
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