Area Conversion Calculator for Most Popular Area Conversions

Area Conversion Calculator Sign

This online area converter will convert acres (ac), hectares (ha), square miles (mi2), square kilometers (km2), square yards (yd2), square meters (m2), and square feet (ft2) to and from their most popular counterparts.

Plus, unlike other online unit converters, this area 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 calculator also provides a feature that will allow you to create your own custom, printable, area 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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Area Conversion Calculator

Convert standard and metric area units for the 16 most popular conversions related to area.

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.


Area units to convert from:

Enter the area 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.


Area 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

Area conversion chart:

To create a custom area conversion chart that you can print out, enter the starting and ending area 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 area conversion table.

BegStartStartingStarting Acres:

Starting units:

Enter the units you want the chart to start at.

EndEndEndingEnding Acres:

Ending units:

Enter the units you want the chart to stop at.


Help and Tools


Common area conversion formulas.

Area Conversion Formula Table

The following area conversion table lists the area conversion formulas for the corresponding type.

ConversionAbbrev.Formula (rounded)
Acres to Hectaresac to haac x 0.404686
Hectares to Acresha to acha x 2.471054
Acres to Square Feetac to ft2ac x 43560
Square Feet to Acresft2 to acft2 x 0.000023
Acres to Square Kilometersac to km2ac x 0.004047
Square Kilometers to Acreskm2 to ackm2 x 247.10538147
Acres to Square Metersac to m2ac x 4046.856422
Square Meters to Acresm2 to acm2 x 0.000247
Acres to Square Milesac to mi2ac x 0.001563
Square Miles to Acresmi2 to acmi2 x 640
Acres to Square Yardsac to yd2ac x 4840
Square Yards to Acresyd2 to acyd2 x 0.000207
Square Feet to Hectaresft2 to haft2 x 0.000009
Hectares to Square Feetha to ft2ha x 107639.10417
Square Miles to Hectaresmi2 to hami2 x 258.998811
Hectares to Square Milesha to mi2ha x 0.003861

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.