Length Converter
Convert between inches, feet, yards, miles, cm, meters, and km.
Last updated: June 13, 2026
Calculator
Results
How to Use This Calculator
- 1Enter the value to convert.
- 2Select the unit you are converting from.
- 3View all equivalent lengths at once.
Formula Explanation
Length units are converted through a common base unit (meters). Each unit has a fixed conversion factor to meters.
Variables:
Worked Examples
100 feet to meters
- 1. 1 foot = 0.3048 meters
- 2. 100 × 0.3048 = 30.48 meters
5 miles to kilometers
- 1. 1 mile = 1.609344 km
- 2. 5 × 1.609344 = 8.04672 km
Why Use This Calculator
- Convert between 7 common length units.
- All conversions shown simultaneously.
- Precise to 4+ decimal places.
- Perfect for construction, travel, and science.
Tips & Best Practices
- Quick mental math: 1 inch ≈ 2.54 cm, 1 foot ≈ 30 cm, 1 mile ≈ 1.6 km.
- A meter is slightly longer than a yard (1 yard = 0.9144 meters).
- Marathon distance: 26.2 miles = 42.195 km.
Common Mistakes to Avoid
❌ Confusing feet and inches when converting height.
✅ 5'10" means 5 feet 10 inches = 70 inches total. Convert the total inches, not just the feet.
❌ Using approximate conversion factors for precise work.
✅ For engineering, use exact factors: 1 inch = exactly 25.4 mm. Approximate conversions can compound errors.
Frequently Asked Questions
How many centimeters are in an inch?
What is the difference between a mile and a kilometer?
Embed This Calculator
Add the Length Converter to your website for free. Copy the code below and paste it into your HTML.
<iframe src="https://redicalc.com/embed/math/length-converter" width="100%" height="600" style="border:none;border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,0.1);" title="Length Converter — RediCalc.com" loading="lazy" allowtransparency="true"></iframe>Disclaimer: This calculator is provided for informational and educational purposes only. Results are estimates and should not be used as a substitute for professional advice. RediCalc.com makes no guarantees regarding the accuracy, completeness, or suitability of any calculations. Always consult a qualified professional before making financial, health, construction, or other important decisions.
By using this site, you agree to our Terms of Use and Privacy Policy. © 2026 RediCalc.com. All rights reserved.