Area Converter
Type an area value, pick the unit you started from, and see the same size expressed in square metres, square kilometres, and acres at once. The three outputs refresh live whenever the number or source unit changes.
Updated 2026-08-03 · units
About this tool
The converter supports three units—m2, km2, and acre—linked through fixed factors relative to square metres. You enter a Value and a From unit; the page divides by the source factor, then multiplies into every listed unit so you can compare land parcels, floors, or maps without a separate formula sheet.
How to use
- Enter the area: Type the numeric Value you want to convert (sample default is 1).
- Select the source unit: Set From to m2, km2, or acre depending on how the original figure was measured.
- Scan all unit lines: Read the live result block showing m2, km2, and acre for the same area.
- Adjust and compare: Change the value or From unit to explore equivalent sizes without reloading.
Common use cases
- Translate a property listing from acres into square metres before comparing offers.
- Convert a floor plan measured in m² into km² for large-site summaries.
- Check map or GIS outputs when source data mixes metric and acre units.
Tips
- Choose the From unit that matches the number you typed, or the other lines will be wrong.
- Non-numeric input shows Enter a number until the value is valid again.
FAQ
Which units are available?
Square metres (m2), square kilometres (km2), and acres—all shown together after each change.
Do I need to press a convert button?
No. Results recompute as soon as the value or From unit updates.
What if I type letters by mistake?
The result area shows Enter a number until the input is a finite number again.
How are the units related?
Everything is normalized through square metres using built-in factors, then expanded to km2 and acres.