Free & Private Online Browser Utility
Length & Distance Converter: Metric & Imperial
Convert distance and length measurements between metric and imperial standards directly in your browser. Convert millimeters, centimeters, meters, kilometers, inches, feet, yards, and nautical miles with exact NIST ratio constants. The tool updates all units simultaneously as you type, making it straightforward to compare architectural blueprints, travel distances, and engineering schematics.
How to use
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Step 1: Enter Length Value
Type your distance or dimension value into any unit input field.
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Step 2: Select Source Unit
Pick your starting unit: meters, feet, inches, centimeters, yards, or kilometers.
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Step 3: Inspect All Equivalents
Read converted values across all metric and imperial units updated in real time.
Worked example
Input: Value: 100 feet
Output: 30.48 meters | 1,200 inches | 33.33 yards | 0.03048 kilometers
Based on international standard definition of 1 foot = 0.3048 meters.
Tips & limits
- 1 inch equals 2.54 centimeters; 1 foot equals 12 inches; 1 meter equals 39.3701 inches.
- Nautical miles (1,852 meters) differ from statute miles (1,609.344 meters) used on land.
- Monospace number displays allow quick scanning of multi-unit equivalents.
Common problems
- Woodworking fractions do not match tape measure lines
Tape measures use binary fractions (e.g. 7/16); compare the decimal value against the fractional approximation.
- Negative lengths cannot be entered
Physical distance and geometric dimension measurements must be positive numbers.
Frequently Asked Questions (FAQ)
What is the exact definition of an inch?
Under the 1959 International Yard and Pound Agreement, 1 inch is defined as 25.4 millimeters.
How many feet are in a statute mile?
There are 5,280 feet in one statute mile, which equals 1,760 yards or 1.609344 kilometers.
Are my measurements sent to an external server?
No. All conversion algorithms execute locally in browser memory with zero network requests.