Distance Conversion Calculator to Convert Measurements

Distance Conversion Calculator Sign

This free online length converter will convert millimeters (mm), centimeters (cm), inches (in), feet (ft), yards (yd), meters (m), and miles (mi) to and from their most popular counterparts.

Plus, unlike other online unit converters, this length converter will show the formula it used for converting as well as the step-by-step math it used to complete the conversion.

Finally, the distance conversion calculator also provides a feature that will allow you to create your own custom, printable, length conversion chart. Just select the type you are converting from and to, enter the desired starting and ending measurements, and click the button. Cool!

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Distance Conversion Calculator

Convert standard and metric distance units for the 20 most popular conversions related to length.

Special Instructions

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Selected Data Record:

A Data Record is a set of calculator entries that are stored in your web browser's Local Storage. If a Data Record is currently selected in the "Data" tab, this line will list the name you gave to that data record. If no data record is selected, or you have no entries stored for this calculator, the line will display "None".

DataData recordData recordSelected data record: None

Conversion type:

Select the desired conversion option. The calculator will then rename the fields according to your selection.


Distance units to convert from:

Enter the distance units to convert from the type listed on in this line.

Round:Round to:Round to:Round to:

Round conversion units:

Select the number of places you would like the "to" units rounded to (affects chart rounding as well). If "None" is selected, no rounding will be performed and raw values will be displayed both in the result field and in the chart. Note that you can alter the rounding of the result before or after the conversion.


Distance conversion result:

This is the area units entered above converted to the type listed on this line.

If you would like to save the current entries to the secure online database, tap or click on the Data tab, select "New Data Record", give the data record a name, then tap or click the Save button. To save changes to previously saved entries, simply tap the Save button. Please select and "Clear" any data records you no longer need.

Create Conversion Chart

Distance conversion chart:

To create a custom distance conversion chart that you can print out, enter the starting and ending distance based on the first type listed in the selected conversion type. Then click the Create Conversion Chart button. This will open a printer friendly window containing your custom distance conversion table.

BegStartStartingStarting Centimeters:

Starting units:

Enter the units you want the chart to start at.

EndEndEndingEnding Centimeters:

Ending units:

Enter the units you want the chart to stop at.


Help and Tools


Common distance conversion formulas.

Distance Conversions

The following conversion chart lists the formulas used by the calculator to calculate its distance conversions.

ConversionAbbrev.Formula (rounded)
Centimeters to Millimeterscm to mmmm x 10
Millimeters to Centimetersmm to cmmm x .1
Feet to Metersft to mft x .30480
Meters to Feetm to ftm x 3.2808398951
Inches to Centimetersin to cmin x 2.54
Centimeters to Inchescm to incm x .3937007874
Inches to Feetin to ftin x .0833333333
Feet to Inchesft to inft x 12
Inches to Metersin to min x .02540
Meters to Inchesm to inm x 39.3700787402
Inches to Millimetersin to mmin x 25.4
Millimeters to Inchesmm to inmm x .0393700787
Miles to Feetmi to ftmi x 5280
Feet to Milesft to mift x .0001893940
Miles to Kilometersmi to kmmi x 1.609344
Kilometers to Mileskm to mikm x .6213711922
Miles to Metersmi to mmi x 1609.344
Meters to Milesm to mim x .0006213712
Yards to Metersyd to myd x .9144000000
Meters to Yardsm to ydm x 1.0936132983

If there is a conversion type you think should be added to the calculator, please let me know in the feedback form located beneath the calculator.

Adjust Calculator Width:

Move the slider to left and right to adjust the calculator width. Note that the Help and Tools panel will be hidden when the calculator is too wide to fit both on the screen. Moving the slider to the left will bring the instructions and tools panel back into view.

Also note that some calculators will reformat to accommodate the screen size as you make the calculator wider or narrower. If the calculator is narrow, columns of entry rows will be converted to a vertical entry form, whereas a wider calculator will display columns of entry rows, and the entry fields will be smaller in size ... since they will not need to be "thumb friendly".

Show/Hide Popup Keypads:

Select Show or Hide to show or hide the popup keypad icons located next to numeric entry fields. These are generally only needed for mobile devices that don't have decimal points in their numeric keypads. So if you are on a desktop, you may find the calculator to be more user-friendly and less cluttered without them.

Stick/Unstick Tools:

Select Stick or Unstick to stick or unstick the help and tools panel. Selecting "Stick" will keep the panel in view while scrolling the calculator vertically. If you find that annoying, select "Unstick" to keep the panel in a stationary position.

If the tools panel becomes "Unstuck" on its own, try clicking "Unstick" and then "Stick" to re-stick the panel.