How accurate are the conversions?

All factors use the internationally agreed exact values (1 inch = 0.0254 m, 1 mile = 1609.344 m). Floating-point rounding is the only source of imprecision.

Does it support nautical miles and light years?

Yes — nautical mile (nmi, 1852 m) for marine and aviation use, plus the astronomical light year for fun comparisons.

Is my input sent anywhere?

No — everything runs in your browser. Your last value and chosen units are stored only in localStorage on your device.

Why is my number shown in scientific notation?

Very small or very large values switch to scientific notation to stay readable. Drag the All units row to spot the formatted value in your preferred unit.

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Unit Converters
Length Converter

Unit Converters

Length Converter

Convert between meters, feet, inches, kilometers, miles, yards, nautical miles and more — instantly, in your browser.

Length converter

Base unit: m · 12 units

From

m — MeterMetric

3.28084

ft — FootImperial

All units

1,000,000,000
1,000,000
1,000
100
1
0.001
39.370079
3.28084
1.093613
6.2137e-4
5.3996e-4
1.057001e-16

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Convert square meters, square feet, acres, hectares, square miles and more — instantly and accurately.

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Convert liters, milliliters, US/UK gallons, cups, tablespoons, fluid ounces, cubic meters and more — live in your browser.

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Temperature Converter

Convert Celsius, Fahrenheit, Kelvin, Rankine, Réaumur. Handles negative temperatures and below-absolute-zero edge cases gracefully.

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Speed Converter

Convert m/s, km/h, mph, knots, ft/s, mach, and the speed of light. Live, browser-only, free.

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Data Storage Converter

Convert bits, bytes, KB/MB/GB/TB (SI) and KiB/MiB/GiB/TiB (IEC). Spot the difference between decimal and binary scales.

About Length Converter

A universal length converter covering metric (mm, cm, m, km), imperial (in, ft, yd, mi), nautical (nmi) and astronomical (light year) units. Type once and see every unit update live. No round-trip loss — the engine works in SI base units under the hood.

How to use

Enter a value in the From field.
Pick the source unit (meters by default) and the target unit.
Read the converted value live — or scroll the All units grid.
Click Swap to flip From and To. Click any unit row to set it as the target.

FAQ

Frequently asked questions

Got questions? We’ve got answers. Here are some of the most common inquiries about Length Converter.

Length converter

Base unit: m · 12 units

From

m — MeterMetric

3.28084

ft — FootImperial

All units

1,000,000,000
1,000,000
1,000
100
1
0.001
39.370079
3.28084
1.093613
6.2137e-4
5.3996e-4
1.057001e-16

Related tools

About Length Converter

How to use

Frequently asked questions

How accurate are the conversions?

Does it support nautical miles and light years?

Is my input sent anywhere?

Why is my number shown in scientific notation?

Related tools

About Length Converter

How to use

Frequently asked questions

How accurate are the conversions?

Does it support nautical miles and light years?

Is my input sent anywhere?

Why is my number shown in scientific notation?