Cheat Sheets
Updated March 2026
📐Length & Distance Conversion Chart
Quick-reference tables for converting between metric and imperial length units.
⚡Quick Reference
1 inch = 2.54 cm | 1 foot = 30.48 cm | 1 yard = 0.9144 m | 1 mile = 1.609 km | 1 meter = 3.281 feet | 1 km = 0.6214 miles
Metric Length Units
| Unit | mm | cm | m | km |
|---|---|---|---|---|
| 1 mm | 1 | 0.1 | 0.001 | 0.000001 |
| 1 cm | 10 | 1 | 0.01 | 0.00001 |
| 1 m | 1,000 | 100 | 1 | 0.001 |
| 1 km | 1,000,000 | 100,000 | 1,000 | 1 |
Imperial Length Units
| Unit | Inches | Feet | Yards | Miles |
|---|---|---|---|---|
| 1 inch | 1 | 0.0833 | 0.0278 | 0.0000158 |
| 1 foot | 12 | 1 | 0.333 | 0.000189 |
| 1 yard | 36 | 3 | 1 | 0.000568 |
| 1 mile | 63,360 | 5,280 | 1,760 | 1 |
Metric ↔ Imperial Cross-Reference
| Metric | Imperial |
|---|---|
| 1 mm | 0.0394 inches |
| 1 cm | 0.3937 inches |
| 2.54 cm | 1 inch |
| 30.48 cm | 1 foot |
| 1 m | 3.281 feet / 39.37 inches |
| 1 km | 0.6214 miles / 3,281 feet |
| 1.609 km | 1 mile |
Frequently Asked Questions
How many centimeters in an inch?
1 inch = 2.54 centimeters exactly. This is the international standard definition.
How many feet in a meter?
1 meter = 3.28084 feet, or approximately 3 feet 3.37 inches.
How many kilometers in a mile?
1 mile = 1.60934 kilometers. For a quick estimate, multiply miles by 1.6.
What is the difference between a nautical mile and a regular mile?
A nautical mile is 1.852 km (1.151 regular miles). It's based on Earth's circumference and used in navigation.