FREE LENGTH CONVERTER

Length converter and size guides

Type a size, get the exact answer and the nearest inch fraction. Use the tabs for millimeters, centimeters, or feet and meters, and press the swap button to convert the other way.

Size guidesmm chartHow we check

25 mm ≈ 63/64″

Slightly less than 63/64″ (by <0.01 mm) · ≈ 0.984 in

mm
Inches
≈ 0.9843 in
Nearest 1/16″
1″ 25 mm is 0.4 mm shorter
Nearest 1/32″
31/32″ 25 mm is 0.39 mm longer
Nearest 1/64″
63/64″ 25 mm is <0.01 mm shorter
05101520253035mm01/81/43/81/25/83/47/811 1/81 1/41 3/8in25 mm≈ 63/64″
Enlarged view, not actual size. Top scale: millimeters. Bottom scale: inches.

30 cm ≈ 11 13/16″

Slightly less than 11 13/16″ (by 0.04 mm) · ≈ 11.811 in

cm
Inches
≈ 11.811 in
Nearest 1/16″
11 13/16″ 30 cm is 0.04 mm shorter
Nearest 1/32″
11 13/16″ 30 cm is 0.04 mm shorter
Nearest 1/64″
11 13/16″ 30 cm is 0.04 mm shorter
05101520253035cm02468101214in30 cm≈ 11 13/16″
Scaled-down view, not actual size. Top scale: centimeters. Bottom scale: inches.

15 ft = 4.572 m

Exact, because 1 foot is defined as exactly 0.3048 m

ft
Meters
= 4.572 m

How to use the converter

  1. Pick the tab for the units you have.
  2. Type the number. The answer, the inch fractions and the ruler update as you type.
  3. Swap direction with the swap button if you need the reverse.
  4. Open a size page below when you want to see the size drawn next to real objects.

Converter pages

CHARTmm to inchesFull chart and printable PDFCHARTcm to inchesFull chart, fractions and rulerMM8 mm to inches≈ 5/16″CM20 cm to inches≈ 7.87 in

Size guides, drawn to scale

Each guide shows the length next to objects whose sizes come from a rule or published specification.

FEETHow long is 5 feet?= 1.524 mFEETHow long is 13 feet?= 3.9624 mFEETHow long is 15 feet?= 4.572 mFEETHow long is 20 feet?= 6.096 mFEETHow long is 33 feet?= 10.0584 mFEETHow long is 36 feet?= 10.9728 mFEETHow long is 60 feet?= 18.288 mFEETHow long is 75 feet?= 22.86 mFEETHow long is 90 feet?= 27.432 mFEETHow long is 200 feet?= 60.96 mMETERSHow long is 1 meter?≈ 3.28 ftMETERSHow long is 2 meters?≈ 6.56 ftMETERSHow long is 5 meters?≈ 16.4 ftMETERSHow long is 10 meters?≈ 32.81 ftMETERSHow long is 18 meters?≈ 59.06 ftMETERSHow long is 150 meters?≈ 492.13 ftMETERSHow long is 300 meters?≈ 984.25 ftMETERSHow long is 400 meters?≈ 1,312 ftINCHESHow long is 7 inches?= 17.78 cmCENTIMETERSHow long is 15 cm?≈ 5.91 inMILLIMETERSHow long is 5 mm?≈ 0.197 in

Exact conversion factors

These are definitions, so the “=” sign is correct for every one of them (NIST SP 811).

  • 1 inch = 25.4 mm = 2.54 cm
  • 1 foot = 12 inches = 0.3048 m
  • 1 yard = 3 feet = 0.9144 m
  • 1 mile = 5,280 feet = 1,609.344 m

Going the other way, 1 meter ≈ 3.2808 feet and 1 mm ≈ 0.0394 inch. These are rounded, so they use “≈”.

Frequently asked questions

How many millimeters are in an inch?

Exactly 25.4 millimeters. This is the international definition of the inch, so it never changes.

How many feet are in a meter?

About 3.2808 feet. Going the other way, 1 foot is exactly 0.3048 meters.

Why do some answers use a fraction?

Rulers and tape measures in inches are marked in fractions such as 1/16 and 1/32, so each page shows the nearest fraction and tells you whether the real value is slightly more or slightly less.

Is the converter free?

Yes. There is nothing to install or sign up for.

DimensionVista

Free length converters and visual size guides, checked against exact definitions.