By Debmedia Technologies LLP · Kolkata, India · Updated
What Is It and When Do You Need It?
Length measures how far apart two points are. The metre is the SI base unit, defined from the speed of light, while inches, feet, yards and miles are still used in daily life in the United States and the United Kingdom.
This converter handles 19 units for metre and shows the result in all of them at once, so you rarely need a second lookup.
How to Use This Tool
- Type the value you want to convert.
- Choose the unit you have in the From list.
- Choose the unit you want in the To list.
- Press Convert and read the answer and the table of every unit.
How the Calculation Works
Every unit is stored as a multiple of one reference unit (the metre). To convert, the value is multiplied into the reference unit and then divided by the size of the target unit. All factors are exact or taken from standard definitions, and results show up to ten significant digits.
Worked Example
| You enter | You get |
|---|---|
| 1 mm | 0.1 cm |
| 10 mm | 0.01 m |
| 100 cm | 1000 mm |
Reference values:
| From | To |
|---|---|
| 1 Millimetre | 0.1 cm |
| 1 Millimetre | 0.001 m |
| 1 Millimetre | 1e-06 km |
| 1 Millimetre | 0.039370079 in |
| 1 Millimetre | 0.0032808399 ft |
| 1 Millimetre | 0.0010936133 yd |
| 1 Millimetre | 6.213712e-7 mi |
| 1 Millimetre | 5.399568e-7 nmi |
| 1 Millimetre | 1000 µm |
| 1 Millimetre | 1000000 nm |
| 1 Millimetre | 10000000 Å |
| 1 Millimetre | 4.9709695e-06 fur |
| 1 Millimetre | 0.00054680665 ftm |
| 1 Millimetre | 0.0098425197 hh |
| 1 Millimetre | 39.370079 mil |
| 1 Millimetre | 1.057001e-19 ly |
| 1 Millimetre | 6.684587e-15 AU |
| 1 Millimetre | 3.240779e-20 pc |
Common Uses
- Converting between metric and imperial for travel, shopping and building.
- Checking sizes of screens, tyres and furniture given in inches.
- Science work in microns, nanometres and angstroms.
- Astronomy distances in light-years and parsecs.
Tips and Common Mistakes
- One inch is exactly 2.54 centimetres by international agreement.
- A nautical mile is 1,852 metres and is used at sea and in the air.
- Use the table under the answer to see the same value in every unit.
Related Tools
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Frequently Asked Questions
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