Length Converter Free Online Tool 2026

Last updated March 22, 2026

Meters to Feet and Inches

Convert a person's height from metric to imperial:

Input: 1.75 meters

Conversions:
1.75 m = 175 cm
1.75 m = 5.7415 feet
1.75 m = 5 feet 8.9 inches
1.75 m = 68.898 inches
1.75 m = 1750 mm

The converter shows the feet-and-inches breakdown (5'8.9") alongside the decimal feet value, which is the most useful format for height measurements.

Kilometers to Miles

Convert road distances for international travel:

Input: 100 kilometers

Conversions:
100 km = 62.137 miles
100 km = 100,000 meters
100 km = 109,361 yards
100 km = 328,084 feet

Quick reference for common distances:

1 km    = 0.6214 miles
5 km    = 3.107 miles
10 km   = 6.214 miles
42.195 km (marathon) = 26.219 miles
100 km  = 62.137 miles

Inches to Centimeters

Convert screen sizes and product dimensions:

Input: 15.6 inches (laptop screen diagonal)

Conversions:
15.6 in = 39.624 cm
15.6 in = 396.24 mm
15.6 in = 1.3 feet
15.6 in = 0.4267 meters

Common screen size conversions:

13.3 in = 33.782 cm
15.6 in = 39.624 cm
24 in   = 60.96 cm
27 in   = 68.58 cm
32 in   = 81.28 cm

Millimeters to Inches (Engineering)

Convert mechanical part dimensions between metric and imperial specifications:

Input: 25.4 mm

Conversions:
25.4 mm = 1 inch (exactly)
25.4 mm = 2.54 cm
25.4 mm = 0.0254 meters

Common engineering conversions:
1 mm   = 0.03937 inches
5 mm   = 0.19685 inches
10 mm  = 0.39370 inches
25.4 mm = 1 inch
50.8 mm = 2 inches
100 mm = 3.93701 inches

Feet to Meters (Construction)

Convert room dimensions for international construction projects:

Input: 12 feet

Conversions:
12 ft = 3.6576 meters
12 ft = 365.76 cm
12 ft = 144 inches
12 ft = 4 yards

Room dimensions example:
20 ft × 15 ft = 6.096 m × 4.572 m
Area: 300 sq ft = 27.87 sq meters

Nautical Miles to Kilometers

Convert maritime and aviation distances:

Input: 100 nautical miles

Conversions:
100 nmi = 185.2 km
100 nmi = 115.078 miles
100 nmi = 182,880 meters

1 nautical mile = 1.852 km = 1.15078 miles

Common aviation distances:
London to Paris: 185 nmi = 342.7 km
New York to London: 3,459 nmi = 6,406 km

Micrometers to Nanometers (Semiconductor)

Convert between small units used in semiconductor manufacturing:

Input: 0.007 micrometers (7nm process node)

Conversions:
0.007 µm = 7 nanometers
0.007 µm = 0.007 × 10⁻⁶ meters
0.007 µm = 7 × 10⁻⁹ meters

Common semiconductor process nodes:
7 nm  = 0.007 µm = 7 × 10⁻⁹ m
5 nm  = 0.005 µm = 5 × 10⁻⁹ m
3 nm  = 0.003 µm = 3 × 10⁻⁹ m
1 nm  = 0.001 µm = 1 × 10⁻⁹ m

Light-Years to Kilometers (Astronomy)

Convert astronomical distances:

Input: 1 light-year

Conversions:
1 light-year = 9.461 × 10¹² km
1 light-year = 9,460,730,472,580.8 km
1 light-year = 5.879 × 10¹² miles
1 light-year = 63,241 AU (astronomical units)

Distance to nearest star (Proxima Centauri):
4.24 light-years = 4.01 × 10¹³ km

Yards to Meters (Fabric and Sports)

Convert fabric measurements and sports field dimensions:

Input: 5 yards

Conversions:
5 yd = 4.572 meters
5 yd = 457.2 cm
5 yd = 15 feet
5 yd = 180 inches

Sports field conversions:
American football field: 100 yd = 91.44 m
Soccer penalty area: 18 yd = 16.459 m
Swimming pool (Olympic): 50 m = 54.681 yd

Conversion Reference Table

Quick reference for the most common length conversions:

From        To              Multiply by
──────────────────────────────────────────
inches      centimeters     2.54
feet        meters          0.3048
yards       meters          0.9144
miles       kilometers      1.60934
km          miles           0.62137
meters      feet            3.28084
cm          inches          0.39370
mm          inches          0.03937
nautical mi km              1.852
light-year  km              9.461 × 10¹²

The converter applies these factors automatically with full precision, eliminating manual calculation errors.