What Is MPa in Concrete? Concrete MPa Chart

MPa stands for megapascals. In concrete, it measures compressive strength after 28 days. N20, N25, N32, and N40 are Australian normal-class grade names for 20, 25, 32, and 40 MPa concrete.

Foucauld Dalle, Founder of MixHubUpdated 3 July 2026

Concrete MPa Chart

The MPa number is not a brand or recipe. It is the specified compressive strength for the hardened concrete. Australian normal-class concrete is commonly described with N-grade names, so N25 concrete is the same strength class as 25 MPa concrete.

Grade	MPa	Typical use	Guide page
N20	20 MPa	Paths, blinding, garden edging, light-duty pads	N20 concrete
N25	25 MPa	Residential driveways, garage slabs, paths, light slabs	N25 concrete
N32	32 MPa	Structural slabs, footings, pools, heavier driveways	N32 concrete
N40	40 MPa	Higher-load structural and engineer-specified work	N40 concrete

How to choose concrete MPa

Start with the engineering drawings, builder specification, or council requirement. If a grade is specified, order that grade. If there is no formal specification, match the MPa to the load, exposure, and durability risk rather than choosing the cheapest line item.

For residential work, N25 concrete is the common driveway and slab starting point. N32 concrete is common for structural slabs, exposed footings, pools, and heavier driveways. N20 concrete belongs in lighter non-structural work, not vehicle traffic.

Does MPa change concrete price?

Usually, yes. Higher MPa grades generally cost more per cubic metre, but the delivered total also depends on postcode, delivery date, truck type, volume, short-load fees, waiting time, pump hire, and GST. Use the concrete price per m3 guide for current material ranges, then check live postcode pricing before booking.

How MPa relates to AS 1379

AS 1379 is the Australian Standard for specification and supply of concrete. It defines normal-class and special-class concrete. The normal N grades are useful shorthand, but special requirements such as exposure class, shrinkage, cement type, aggregate size, pumpability, or slump still need to be ordered correctly.

Check availability by postcode

MixHub currently supports live ready-mix delivery pricing in Sydney, including Western Sydney and South-West Sydney corridors. Use concrete delivery Sydney for the local delivery hub or enter a postcode to compare available plant pricing.

Frequently Asked Questions

What does MPa mean in concrete?

MPa means megapascals, the unit used to describe concrete compressive strength. A 25 MPa mix is designed to reach 25 megapascals after 28 days when sampled, cured, and tested correctly.

Is N25 the same as 25 MPa concrete?

Yes. In normal-class concrete, N25 means a 25 MPa grade. N20, N25, N32, and N40 are common Australian shorthand names for 20, 25, 32, and 40 MPa concrete.

Does higher MPa concrete always mean better concrete?

No. Higher MPa means higher compressive strength, but the right mix also depends on slump, aggregate size, exposure class, placement method, reinforcement, curing, and the engineer's specification.

What MPa concrete do I need for a driveway?

N25 is common for standard residential driveways. Use N32 or higher when heavy vehicles, steep access, poor ground, exposure, or engineering drawings require it.

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