A PLANNING TOOL

Make room for
the possibilities.

A simple floor area calculator to help you understand the relationship between plot size and a supplied FAR ratio.

Floor area calculator

Enter the ratio, e.g. 2.0 for a FAR of 200%. Confirm the applicable ratio with your architect or local authority.

TOTAL FLOOR AREA AT THIS RATIO400 m²

200 m² plot × 2 FAR


How it works

Plot area × FAR ratio = total floor area. This is the aggregate area across floors under the ratio you enter.

This is an arithmetic planning aid, not an approval or a statement of permitted development. Setbacks, height limits, ground coverage, exemptions and local rules also affect what can be built.

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