Why Queenslanders Still Talk in Perches (Not Square Metres)

You know you’re from Queensland when land size is still measured in perches, not square metres—and definitely not acres.

So if you’re a long-time Queenslander confused by this “new-age metric talk,” or a southerner trying to figure out why everyone keeps saying things like “it’s a 16 percher”, here’s a simple breakdown of what it all actually means.

What is a perch, exactly?

A square perch (usually just called a perch) is a traditional unit of land measurement used in surveying.

One square perch equals:

• 25.29285264 square metres

To put it another way, it’s an old surveying unit that dates back to when land was measured using chains, rods, and poles in imperial systems.

A perch is also known as a rod or pole, and it’s based on a length of:

• 5.5 yards
• 16.5 feet
• or one-quarter of a surveyor’s chain

It might sound outdated, but it’s still deeply embedded in Queensland’s property language—especially when it comes to residential blocks.

How perches relate to acres

Before Australia fully shifted to metric, land was commonly divided into perches:

• 1 acre = 160 perches

This made it easy for surveyors to divide land into consistent, workable parcels. For example, an acre could be neatly broken into:

• 40 perches × 4 perches = 1 acre

Simple, practical—and still echoed in many suburban block sizes today.

Why Brisbane blocks are often 405m², 607m², 809m² or 1012m²

If you’ve ever browsed real estate listings in Brisbane, you’ve probably noticed a pattern: block sizes often look oddly specific—405m², 607m², 809m², 1012m².

There’s a reason for that.

These are the metric conversions of traditional perch-based subdivisions:

• 16 perches = 404.69 m² (commonly rounded to 405 m²)
• 24 perches = 607.03 m² (often shown as 607 m²)
• 32 perches = 809.37 m² (rounded to 809 m²)
• 40 perches = 1011.71 m² (rounded to 1012 m²)

So those “random” numbers aren’t random at all—they’re a direct translation of old imperial land divisions into modern metric measurements.

Why it still matters today

Even though Australia officially uses the metric system, Queensland’s housing stock is still heavily influenced by historical subdivision patterns.

That’s why architects, designers, builders, and real estate agents still casually refer to land in perches—especially when discussing older suburbs or knock-down rebuild sites.

It’s one of those quirks of place: a mix of surveying history, suburban development, and habit that never quite disappeared.

And once you start thinking in perches, square metres suddenly feel a little less intuitive.