Length Converter
Convert between feet, inches, miles, kilometers, meters, and more. Fast, accurate, mobile-friendly length conversions.
Universal Length Converter
Common in US for height/distance
12 inches = 1 foot
Quick Conversion Formulas
Common Length Reference Points
Credit Card Width
3.375 inches / 8.57 cm
Average Human Height
5.5-6 feet / 167-183 cm
Football Field
100 yards / 300 feet / 91.4 m
Marathon Distance
26.2 miles / 42.195 km
Conversion History
No conversion history yet
Your recent conversions will appear here
Need More Tools?
For calculations and conversions beyond conversions, try PresentForge - Build stunning presentations with AI assistance.
⚠️ Important Disclaimer
This tool provides estimates for informational purposes only. Results should not be relied upon for important decisions. Always consult with a qualified professional for advice specific to your situation.
Understanding Length & Distance
Two Systems
Imperial (inches, feet, miles) vs Metric (centimeters, meters, kilometers).
Clothing Sizes
International clothing sizes often use centimeters for accurate measurements.
Road Distances
1 mile = 1.60934 km - Important for international road trips and GPS navigation.
Precision Matters
1 inch = exactly 2.54 cm - The official conversion defined by international agreement.
Popular Length Conversions
Quick Length Conversion Reference
| From | To | Formula | Example |
|---|---|---|---|
| Feet | Inches | in = ft × 12 | 5 ft = 60 in |
| Inches | Feet | ft = in ÷ 12 | 72 in = 6 ft |
| Centimeters | Inches | in = cm ÷ 2.54 | 10 cm = 3.94 in |
| Inches | Centimeters | cm = in × 2.54 | 10 in = 25.4 cm |
| Miles | Kilometers | km = mi × 1.609 | 10 mi = 16.09 km |
| Kilometers | Miles | mi = km ÷ 1.609 | 10 km = 6.21 mi |
| Meters | Feet | ft = m × 3.281 | 10 m = 32.81 ft |
| Feet | Meters | m = ft ÷ 3.281 | 10 ft = 3.05 m |
Understanding Length Units
Imperial System
Used primarily in the United States. Based on historical measurements.
- Inch (in): Smallest common unit
- Foot (ft): 12 inches
- Yard (yd): 3 feet = 36 inches
- Mile (mi): 5,280 feet
Metric System
Used worldwide. Based on powers of 10 for easy conversion.
- Millimeter (mm): 1/1000 meter
- Centimeter (cm): 1/100 meter
- Meter (m): Base unit
- Kilometer (km): 1,000 meters
Common Length Conversion Use Cases
🏠 Construction & DIY
Converting room dimensions, lumber sizes, and building specifications between imperial and metric units.
✈️ Travel & Navigation
Understanding distances, speed limits, and directions when traveling between countries with different measurement systems.
🏃 Sports & Fitness
Converting race distances (5K, 10K, marathon), track lengths, and personal records between units.
📏 Height & Measurements
Converting personal height, furniture dimensions, and clothing measurements for international shopping.
🔬 Science & Engineering
Working with technical specifications, research data, and international standards requiring unit conversions.
📱 Technology & Screens
Understanding screen sizes, device dimensions, and technical specifications in different units.
Frequently Asked Questions
What's the easiest way to convert length units?
Use our universal length converter above to instantly convert between any units. Enter a value, select your units, and get accurate results immediately.
Which countries use feet and inches vs meters?
The United States primarily uses feet and inches (imperial system). Most other countries use meters and centimeters (metric system). The UK uses a mix of both systems.
How accurate are these conversions?
All conversions use official international conversion factors and are accurate to 4+ decimal places. Results are suitable for professional, scientific, and everyday use.