Concrete calculator (embed)

Concrete calculator

Millimetres in, cubic metres and litres out. The same maths as Concrete in the MeisterCalc app, including its 10% extra.

This calculator needs JavaScript, which is turned off or didn't load. You can still do it by hand: the formulas and worked examples below give the same answers.

Units

Metric (mm, m³) US (ft, in, yd³)

What are you pouring?

Slab Strip footing Post holes

Slab length

Slab width

Slab depth

Count bags of (optional)

Yields from each maker's data sheet, listed under the calculator.

Cost (optional): your price per m³, cubic yard or bag

Price

Your supplier's price, in your currency.

Priced

Rebar for a slab (optional): bars both ways, cover, laps

Uses the slab length and width above. The bar spacing, cover and lap come from your drawings; the numbers here are only the example.

Bar spacing, both ways

Edge cover

Concrete between the bar ends and the slab edge.

Lap where bars join

Only needed when a bar is longer than one stock length.

Stock bar length

Calculator by MeisterCalc: formulas and worked examples on the full page.