How many feet are in a mile?

There are exactly 5,280 feet in one mile. This tool calculates it instantly — just enter 1, select "Mile," and check the feet row.

What's the difference between a nautical mile and a regular mile?

A nautical mile equals 1,852 meters (about 1.15 regular miles). It's based on Earth's circumference and is used in aviation and maritime navigation.

Can I convert between metric and imperial units?

Absolutely. This converter handles both systems simultaneously. Enter a metric value and see all imperial equivalents (and vice versa) in one view.

What are Shakkan-ho units?

Shakkan-ho refers to traditional Japanese measurement units still occasionally used in construction, textiles, and cultural contexts. One shaku equals approximately 30.3 centimeters.

How accurate is this calculator?

The conversion factors are based on official international definitions. Results are displayed with appropriate precision for each unit type, typically 4-14 significant figures depending on the scale.

Length Unit Converter – 38 Units, Instant Results, 100% Free

10.01.2026

Need to convert meters to feet? Kilometers to miles? Or maybe something less common like light-years to parsecs?

This length unit converter handles 38 different units across metric, imperial, Japanese traditional, and even astronomical systems. Enter your value, pick your unit, and get every conversion instantly.

No formulas to memorize. No app to download. Just fast, accurate results.

Calculate Now

Length Unit Conversion Tool

Convert between various length units including Metric (SI prefixes), Imperial/US Customary, Shakkan-ho, and Astronomical/Nautical units.

System	Unit	Value	Symbol
Enter a value and click “Calculate”.

TOC

How to Use This Tool

Getting your conversion takes about 3 seconds:

Enter your number in the input field (decimals work too)
Select your starting unit from the dropdown menu
Click “Calculate” (or just wait — it updates automatically as you type)

Your results appear in a table showing all 38 unit conversions at once, organized by measurement system.

On mobile: The results display as easy-to-read cards instead of a table.

Need to start over? Click “Clear” to reset everything back to 1 meter.

Example Conversion

Let’s say you need to convert 5 miles to other units:

Enter: 5
Select: Mile (mi)
Result: The table instantly shows 5 miles equals approximately 8.05 kilometers, 8,046.72 meters, 26,400 feet, and every other unit.

You can also go the other direction. Enter 100 and select centimeters to see that 100 cm equals about 3.28 feet or 39.37 inches.

Understanding Your Results

The results table is organized into four sections:

Metric (SI Prefixes): From yottameters (astronomically large) down to picometers (subatomic scale)
Imperial/US Customary: Miles, yards, feet, inches, and other units common in the United States
Shakkan-ho (Japanese): Traditional Japanese measurements like shaku and ri
Astronomical/Nautical: Light-years, parsecs, astronomical units, nautical miles, and fathoms

For extremely large or small values, results display in scientific notation (like 1.23e+10) to keep things readable.

How Length Conversion Works

Every length unit has a defined relationship to the meter, which serves as the international standard base unit. This tool stores precise conversion factors for all 38 units.

When you enter a value, the calculator first converts your input to meters, then multiplies by each unit’s conversion factor to display all results simultaneously.

For example:

1 mile = 1,609.344 meters (exact definition)
1 inch = 0.0254 meters (exact definition)
1 light-year ≈ 9.461 × 10¹⁵ meters

The conversion factors used follow internationally recognized standards, including definitions from the International Bureau of Weights and Measures (BIPM) and the US National Institute of Standards and Technology (NIST).

Note: Results are calculated to high precision but may show slight rounding for display purposes. For scientific or engineering applications requiring extreme precision, always verify against official standards.

FAQ

How many feet are in a mile?: There are exactly 5,280 feet in one mile. This tool calculates it instantly — just enter 1, select “Mile,” and check the feet row.
What’s the difference between a nautical mile and a regular mile?: A nautical mile equals 1,852 meters (about 1.15 regular miles). It’s based on Earth’s circumference and is used in aviation and maritime navigation.
Can I convert between metric and imperial units?: Absolutely. This converter handles both systems simultaneously. Enter a metric value and see all imperial equivalents (and vice versa) in one view.
What are Shakkan-ho units?: Shakkan-ho refers to traditional Japanese measurement units still occasionally used in construction, textiles, and cultural contexts. One shaku equals approximately 30.3 centimeters.
How accurate is this calculator?: The conversion factors are based on official international definitions. Results are displayed with appropriate precision for each unit type, typically 4-14 significant figures depending on the scale.

Quick Reference: Common Conversions

Here are some conversions people look up most often:

1 kilometer = 0.621 miles
1 mile = 1.609 kilometers
1 meter = 3.281 feet
1 foot = 0.305 meters
1 inch = 2.54 centimeters
1 centimeter = 0.394 inches
1 yard = 0.914 meters
1 nautical mile = 1.852 kilometers

For any conversion not listed here, just use the calculator above.

More Than Just Basic Conversions

Whether you’re a student doing physics homework, an engineer checking specifications, a traveler trying to understand road signs, or just curious how many inches tall you are — this tool has you covered.

Bookmark this page for quick access whenever you need a length conversion. No ads blocking your results, no account required, no limits on usage.