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From: Meters (m)
To: Centimeters (cm)
Length units are essential for measuring distances in various contexts, from everyday measurements to scientific applications. Different systems are used around the world, with the metric and imperial systems being the most common.
The meter is the SI base unit for length. Originally defined as 1/10,000,000 of the distance from the North Pole to the equator, it is now defined as the distance light travels in a vacuum in 1/299,792,458 of a second.
Room dimensions, human height, moderate distances
The metric system uses standard prefixes to create multiples and submultiples of the base unit:
| Prefix | Symbol | Factor |
|---|---|---|
| Kilo- | k | 10³ (1000) |
| Centi- | c | 10⁻² (0.01) |
| Milli- | m | 10⁻³ (0.001) |
| Micro- | μ | 10⁻⁶ (0.000001) |
| Inch (in) | Base unit for small measurements |
| Foot (ft) | 12 inches = 1 foot |
| Yard (yd) | 3 feet = 1 yard |
| Mile (mi) | 5,280 feet = 1 mile |
The imperial system is primarily used in the United States and a few other countries. It has historical origins and is based on traditional measurements derived from human body parts and other arbitrary references.
= 2.54 cm
= 30.48 cm
= 0.9144 m
= 1.60934 km
1 nautical mile = 1.852 kilometers
Used in maritime and aviation contexts. Defined as one minute of latitude on the Earth's surface.
1 fathom = 6 feet = 1.8288 meters
Used for measuring water depth.
Distance light travels in one year
1 ly = 9.461 × 10¹⁵ meters
Average distance from Earth to Sun
1 AU = 149.6 million km
Used in atomic physics and chemistry
1 Å = 10⁻¹⁰ meters = 0.1 nanometers
Astronomical unit of distance
1 pc = 3.086 × 10¹⁶ meters ≈ 3.26 light years
• 1 cm ≈ 0.39 inches (divide by 2.54)
• 1 meter ≈ 3.28 feet (multiply by 3.28)
• 1 km ≈ 0.62 miles (multiply by 0.62)
• 1 inch = 2.54 cm (multiply by 2.54)
• 1 foot ≈ 0.3 meters (multiply by 0.3)
• 1 mile ≈ 1.61 km (multiply by 1.61)
Speed up your conversions with these keyboard shortcuts:
Tab: Navigate between input fields
Alt + Arrow Down: Open unit dropdown
Ctrl + Alt + S: Swap units
The converter maintains high precision for calculations, but displays results in a readable format. For scientific and engineering applications requiring exact precision, consider:
• For very large or small numbers, results are displayed in scientific notation
• Calculations maintain at least 10 significant digits of precision
• Some conversions (like metric to imperial) may involve slight rounding due to definition differences
| If you have | Equivalent to |
|---|---|
| 1 meter | 100 cm = 1000 mm = 39.37 inches = 3.28 feet |
| 1 kilometer | 1000 m = 0.62 miles = 3281 feet |
| 1 inch | 2.54 cm = 25.4 mm = 0.0254 m |
| 1 foot | 12 inches = 30.48 cm = 0.3048 m |
| 1 yard | 3 feet = 36 inches = 0.9144 m |
| 1 mile | 5280 feet = 1760 yards = 1.60934 km |