Measurement & Project Planning calculator
Square Metres Calculator
Convert floor, wall or land area into square metres from common imperial or metric area units.
Convert floor, wall or land area into square metres from common imperial or metric area units. Start with measurements from the actual job and use manufacturer or supplier figures wherever the form asks for coverage, yield, density, spacing or pack size. Watch the selected area units in particular. Square metres are area units, so convert square feet with the area factor of about 0.092903 rather than applying a single feet-to-metres length conversion.
What you need to enter
The Square Metres Calculator uses the following project information to calculate the result.
- Value
- From unit
- To unit
Calculator result
Converted area
How the Square Metres Calculator works
Calculation logic: standard metric/imperial area conversion. For area converted to square metres, the Square Metres Calculator uses that method after normalising the entered units. The output is then converted for display. The practical assumption that deserves the closest check is the selected area units.
Square Metres Calculator worked example
Square Metres Calculator example: If the starting value is 20 m², converting to square feet gives about 215.28 ft². The square metres keeps the area conversion squared rather than applying a linear metre-to-foot factor. After calculating, compare the result with the job conditions and especially the selected area units before rounding or selecting materials.
Important calculation assumptions
For area converted to square metres, square metres are area units, so convert square feet with the area factor of about 0.092903 rather than applying a single feet-to-metres length conversion.
Frequently asked questions
How do I convert square feet to square metres?
Multiply square feet by about 0.092903. The calculator applies a true area conversion, so it does not confuse square units with a simple feet-to-metres length conversion.
Should I round square metres before calculating materials?
Usually no. Keep the converted area precise until you apply pack coverage, tile size, paint coverage or another material formula, then round the final purchasing quantity.
Can I add metric and imperial room areas together?
Convert them to one common area unit first. Adding a value in ft² directly to a value in m² produces a meaningless total.