Enter your centimeter (cm) value, select cm as the source unit, and the inch (in) result appears instantly. Formula: cm ÷ 2.54 = inches. Example: 30 cm ÷ 2.54 = 11.81 inches. One inch is exactly 2.54 centimetres by international definition. Copy the result with one click.

Exactly 1 inch = 2.54 centimetres (cm). This is a fixed, exact value — not an approximation. In reverse: 1 cm = 0.3937 inches. Common reference: 30 cm ≈ 11.81 in; 1 foot (12 inches) = 30.48 cm.

Feet to meters: ft × 0.3048 = m. Example: 5 ft = 1.524 m. Meters to feet: m ÷ 0.3048 = ft. Example: 1.8 m = 5.906 ft. One foot (ft) = 30.48 cm = 0.3048 meter (m) exactly. Select your source unit and the converter outputs both directions simultaneously.

Exactly 1 foot (ft) = 12 inches (in). In reverse: 1 inch = 0.0833 feet. Common references: 6 ft = 72 in; 5 ft 10 in = 70 in = 177.8 cm. The foot is also equal to 30.48 centimetres (cm) or 0.3048 metres (m).

Kilometres to miles: km ÷ 1.60934 = mi. Example: 10 km = 6.214 miles (mi). Miles to kilometres: mi × 1.60934 = km. Example: 5 mi = 8.047 km. The exact conversion is 1 mile = 1,609.344 metres (m) = 1.609344 km. Quick mental check: multiply km by 0.6 for a rough mile estimate.

Exactly 1 kilometre (km) = 1,000 metres (m). In reverse: 1 m = 0.001 km. Related: 1 km = 100,000 cm = 1,000,000 mm = 0.621 miles (mi) = 1,093.6 yards (yd). Kilometre-to-metre is a pure decimal shift — no rounding needed.

mm to cm: mm ÷ 10 = cm. Example: 85 mm = 8.5 cm. cm to mm: cm × 10 = mm. Example: 12.5 cm = 125 mm. Both millimetre (mm) and centimetre (cm) are metric units — conversion is a simple factor of 10. For meters: 1 m = 100 cm = 1,000 mm.

UntangleTools Length Converter supports all standard units: millimeter (mm), centimeter (cm), meter (m), kilometer (km), inch (in), foot (ft), yard (yd), mile (mi), and nautical mile. Enter any value, select the source unit, and all outputs update simultaneously. One-click copy for each result. Free, no signup, works on mobile.

Yards to meters: yd × 0.9144 = m. Example: 100 yd = 91.44 m (a standard American football field). Feet to meters: ft × 0.3048 = m. Example: 10 ft = 3.048 m. One yard (yd) = 3 feet (ft) = 0.9144 metre (m) exactly. Common in sports (athletics tracks use metres; American sports use yards).

Step 1: cm ÷ 30.48 = total feet (keep the decimal). Step 2: take the decimal part × 12 = remaining inches. Example: 175 cm ÷ 30.48 = 5.741 ft → 5 ft + (0.741 × 12) = 5 ft 8.9 in. The tool calculates both the whole feet and the remaining inches automatically — no manual step needed.

Four steps: (1) Type or paste a number into the input. (2) Select the source unit from the dropdown — mm, cm, m, km, in, ft, yd, or mi. (3) All conversions update instantly — no button press needed. (4) Click the Copy icon next to any unit to copy that result to your clipboard. Works the same on desktop and mobile.

Yes. The tool converts freely between SI metric units (millimetre / mm, centimetre / cm, metre / m, kilometre / km) and imperial / US customary units (inch / in, foot / ft, yard / yd, mile / mi). Select any metric unit as input and see all imperial outputs, or vice versa. No separate mode switch needed.

Yes — all of them in one tool. Supported units: millimeter (mm), centimeter (cm), meter (m), kilometer (km), inch (in), foot (ft), yard (yd), mile (mi), nautical mile (nmi). Select any as the source unit and see every other unit's equivalent displayed simultaneously, with one-click copy per row.

Yes. Decimal values are fully supported — enter 5.75 inches or 12.3 cm and the tool handles it precisely. Decimal inches to feet: in ÷ 12 (e.g., 14.5 in = 1.208 ft). cm to mm: cm × 10 (e.g., 7.5 cm = 75 mm). No rounding at the input stage — full floating-point precision throughout.

Yes on both counts. Conversions use exact internationally defined values (e.g., 1 inch = 2.54 cm exactly per the 1959 international yard and pound agreement) with full 64-bit floating-point arithmetic. There are no fees, no account. All units — mm, cm, m, km, in, ft, yd, mi — are available free at untangletools.com/unit/category/length.

Divide centimetres by 100 to get metres: cm ÷ 100 = m. Examples: 150 cm = 1.5 m; 250 cm = 2.5 m; 75 cm = 0.75 m. In reverse, multiply: m × 100 = cm. This is a metric system rule — the prefix "centi-" means one-hundredth, so 100 centimetres always equals 1 metre (m).

100 cm = 1 metre (m) exactly. 150 cm = 1.5 m. Formula: cm ÷ 100 = m. More examples: 200 cm = 2 m; 75 cm = 0.75 m; 50 cm = 0.5 m. In imperial: 100 cm = 39.37 inches = 3.28 feet; 150 cm = 59.06 inches = 4.92 feet (approximately 4 ft 11 in).

Divide the centimetre (cm) value by 100: cm ÷ 100 = m. For a list of lengths, divide each by 100 then sum in metres for the total. Example: a table leg of 72 cm = 0.72 m; four legs = 4 × 0.72 = 2.88 m total. For millimetres to metres: mm ÷ 1,000 = m (e.g., 1,500 mm = 1.5 m).

UntangleTools Length Converter is designed for both audiences. For students: instant cm-to-m, mm-to-cm, feet-to-metres answers with the formula shown. For engineers and architects: high-precision decimal output, full metric + imperial coverage (mm, cm, m, km, in, ft, yd, mi), and one-click copy for pasting into drawings or reports. No login. Mobile-friendly. Always free.

Yes. The converter is fully responsive — tap-friendly inputs, readable output rows, and one-tap Copy buttons optimised for touchscreens. Open untangletools.com/unit/category/length in Chrome, Safari, or any mobile browser on iPhone, Android, or tablet. No app download needed. You can also paste values from other apps directly into the input field on mobile.