Length conversion

L_target=L_source× Factor

Where：

• L_source: Source‑side length value

• Factor: Unit conversion factor

• L_target: Converted target‑side result

Convert between length units: km, m, cm, mm, ft, in, mil, yd, mi, and nmi. Ideal for construction, engineering, navigation, international trade, and daily life. Supports real-time bidirectional conversion with high precision.

Supported Units & Relationships

Key Conversion Formulas

• 1 km = 1000 m

• 1 m = 100 cm = 1000 mm

• 1 ft = 0.3048 m

• 1 in = 2.54 cm = 25.4 mm

• 1 yd = 3 ft = 0.9144 m

• 1 mi = 1.60934 km

• 1 nmi = 1852 m = 1.852 km

• 1 mil = 0.001 in = 0.0254 mm

Example Calculations

Example 1: Meter to Inches

1 meter = ? inches
1 m = 100 cm → 100 ÷ 2.54 ≈ 39.37 inches

Example 2: Mile to Kilometers

1 statute mile = 1.60934 km

Example 3: Nautical Mile to Meters

1 nautical mile = 1852 meters

Example 4: Inch to Millimeters

1 inch = 25.4 mm

Example 5: Yard to Feet

1 yard = 3 feet

Example 6: Millimeter to Inches

1000 mm = 1000 × 0.03937 ≈ 39.37 inches

Example 7: Mil to Millimeters

1 mil = 0.0254 mm

Use Cases

• Construction and civil engineering — converting blueprints from metric to imperial or vice versa

• Mechanical manufacturing and parts machining — ensuring tolerances match across global suppliers

• Maritime and aviation navigation — using nautical miles for sea and air routes

• International trade and logistics — standardizing cargo dimensions and shipping containers

• Teaching and student learning — understanding unit systems in math and science classes

• Daily life measurements — home renovation, shopping, DIY projects

Reference Standards

• ISO 80000-1: Quantities and units — Part 1: General

• IEC 60050: International Electrotechnical Vocabulary

• NIST Special Publication 811: Guide for the Use of the International System of Units (SI)

• Textbooks: "Engineering Mechanics" by Hibbeler, "Physics for Scientists and Engineers" by Serway