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Minis ยท Planning and building

True plot area

The real area of a four-sided plot from its four side lengths, and how much a length-times-width estimate overstates it.

Free to run. Sign in once and use it as often as you need.

What we need

One thing at a time. Fill it in and press Run.

No credits are used.

The answer

From the register, with its date and source.

Nothing run yet. The answer appears here with everything this mini adds:

  • The area in square feet, square metres and cents together
  • How far the naive length-times-width figure overstates an irregular plot
  • Whether the plot counts as a corner plot from the sides you mark

How this works

What it reads, what it needs, and how to read the answer.

What it does

Most plots are not rectangles, and multiplying an average length by an average width overstates the area of anything irregular. This mini computes the true area from the four side lengths.

What you give it

The four side lengths going around the plot, A being the front, in feet or metres, and which sides face a road.

1Sides measured in2Side A (front)3Side B4Side C (back)5Side D6Sides facing a road
What it adds beyond the portal
  • The area in square feet, square metres and cents together
  • How far the naive length-times-width figure overstates an irregular plot
  • Whether the plot counts as a corner plot from the sides you mark
What it costs
Free every run

Run it as often as you need. Nothing is deducted.

How to read the result

From four sides alone the shape is not fully fixed, so the figure given is the maximum area those sides can enclose, which is the convention used for plots. The overstatement line shows how far a rectangle estimate exceeds it.

Where the data comes from

Plane geometry, the same calculation the LandLens build feasibility engine uses.

Questions people ask

Short answers, no jargon.

Why is the area less than length times width?

Because the plot is not a rectangle. Four sides that differ cannot enclose as much as a rectangle with the same average sides, and the difference is what a seller quoting length times width adds on.

Do I need the diagonal?

No. Without a diagonal the mini gives the maximum area the four sides can enclose, which is the figure surveyors use when a plot is measured by its sides. With a diagonal the exact figure can be computed in LandLens One.

Can I enter feet?

Yes. Pick feet or metres; the conversion is done for you.

Still unsure? Ask LandLens One, it can reason about this parcel with you.

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