Length Converter

Convert between metric, imperial, and scientific length units with precision.

Last updated: March 2026 | By Patchworkr Team

From Unit

To Unit

Amount

Decimal Places

Result

Enter a value to convert...

What is Length Conversion?

Length conversion translates a measurement from one unit into another. It is useful for science, construction, travel, and any workflow where different unit systems need to communicate clearly.

How to Use This Tool

Conversion Steps

Step 1: Select the source unit

Step 2: Enter the value to convert

Step 3: Select the target unit

Step 4: Use Swap Units to reverse the conversion

Step 5: Copy the result when needed

Example Conversions

Metric to Imperial

1 inch = 2.54 cm

1 foot = 30.48 cm

1 yard = 0.9144 m

1 mile = 1.609 km

Metric Prefixes

1 km = 1,000 m

1 m = 100 cm

1 cm = 10 mm

1 mm = 1,000 um

Frequently Asked Questions

How accurate are the conversions?

The converter uses fixed factors for each unit and supports configurable decimal precision for display.

Can I convert scientific distances?

Yes. Nautical miles, light years, and astronomical units are included alongside common metric and imperial units.

What does Swap Units do?

It exchanges the source and target unit selection and updates the input to match the current result.

Can I copy the answer?

Yes. Use Copy to place the converted value and target unit symbol on your clipboard.

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