How Thick Should a Concrete Driveway Be?
Four inches for cars, six for anything heavier. But the edges fail before the middle does, and the sub-base matters more than either.
Read the guide →Concrete Guides & Advice
Practical guides on ordering, mixing and pricing concrete — written to answer the questions our calculators leave open. No filler, no sales pitch.
How Deep Should Foundations Be?
One metre is the usual UK answer and it is only a starting point. Soil type, trees and frost decide the real number, and so does the inspector.
Read the guide →How to Pour a Concrete Slab: Step by Step
Most of the work happens before the concrete arrives. Get the sub-base and formwork right and the pour itself is the easy part.
Read the guide →What Is C25 Concrete and When Should You Use It?
C25 hits 25 newtons per square millimetre at 28 days. It is the sensible minimum for anything a car drives on, and the mix ratio is 1:1.5:3.
Read the guide →The 1:2:4 Concrete Mix Explained
One cement, two sand, four aggregate. It is the default DIY concrete mix for good reason, and getting it right comes down to how you measure.
Read the guide →How Many Bags of Concrete for a 10×10 Slab?
A 10x10 slab at four inches takes 56 bags of 80 lb premix. That is 4,480 lb of bags to lift, open and mix — which is exactly why most people should not.
Read the guide →How Much Is a Cubic Metre of Concrete in the UK?
Ready-mix runs £100 to £150 per cubic metre delivered. Order one metre and you can pay half as much again per unit — here is why, and how to avoid it.
Read the guide →How Much Does a Yard of Concrete Cost in 2026?
Ready-mix runs $125 to $195 per cubic yard delivered. The quote is the easy part — the short-load fee, waiting time and pump hire are what move the final bill.
Read the guide →C20, C25, C30: Concrete Grades Explained in Plain English
C25/30, GEN3, ST2, 3,500 psi — four naming systems for the same handful of mixes. Here is what each one means and which to order for the job in front of you.
Read the guide →How Many Bags of Concrete Are on a Pallet?
A pallet of 80 lb bags is 42 bags and just under a cubic yard of concrete. Full pallet counts, yields and weights for US and UK bag sizes.
Read the guide →Jump straight to a calculator
- Concrete Slab CalculatorSlabs, pads, floors & shed bases
- Concrete Footing CalculatorStrip & pad footings, foundations
- Concrete Wall CalculatorPoured walls & stem walls
- Concrete Column CalculatorColumns, sonotubes & piers
- Concrete Stairs CalculatorSteps & staircases
- Curb & Gutter CalculatorCurbs, gutters & edging
- Concrete Bag CalculatorHow many bags do you need?
- Concrete Cost CalculatorReady-mix & bagged prices
- Mix Ratio CalculatorCement, sand & aggregate quantities
- Concrete Weight CalculatorWeight per m³, yard & cubic foot
- Ballast CalculatorBallast & cement for concrete (UK)
- Sand & Cement CalculatorMortar for patios & bricklaying
- Concrete Block CalculatorBlocks, bricks & mortar for walls
- Post Hole CalculatorFence posts & postcrete