iPhone · Free · Works offline

Order the right amount of concrete. First time, every time.

SlabMate is the concrete calculator for UK trades, covering volume, bags, mix, waste and cost for every pour, worked out offline on site.

See what’s inside

Free forever · No account · No ads · No cross-app tracking · Built in Britain

6: shape calculators
3: mix modes
100%: offline, on site

01 / Calculators

Every pour, one app.

From a shed base to a footing run, SlabMate turns dimensions into a clear order covering volume, bags, mix and cost.

Every shape you pour

Slabs, footings, post holes, columns, steps and ring bases, each with the right inputs instead of one generic box.

See it before you pour

A 3D solid renders as you type, so a wrong dimension is obvious before you order or mix a thing.

The whole order, one screen

Volume, litres, bag count, mix, waste, estimated weight and cost. Everything you need to place the order.

Works with no signal

It all runs on your iPhone. There is no account and no waiting, even down a hole or in the middle of a field.

Set up for UK sites

Sensible waste allowances, densities and bag yields, tuned for UK ready-mix and bagged concrete.

Send the estimate

Fire a plain-text estimate to the office or the customer straight from the native share sheet.

02 / Workflow

From dimensions to order in three taps.

No formulas and no unit juggling. Pick the shape, enter what you know, and read off exactly what to buy.

01
Pick the shape
Choose a slab, footing, post hole, column, steps or ring base, then enter the dimensions.
02
Enter what you know
Dimensions, quantity and your waste allowance. The 3D preview updates as you type.
03
Read off the order
Review the volume, bags, mix, weight and cost before buying or sharing the estimate.

03 / Coverage

One tool for every shape you pour.

Pick the shape, enter what you know, and read off the order. No formulas, no unit juggling, no guesswork on waste.

Slabs & floors
Trench & wall footings
Fence post holes
Columns & round pads
Steps
Ring & annulus bases

04 / Your jobs

Job book

Keep every job you work out.

A working estimator does not price one pour and forget it. Every job you work out can be kept, named and reopened, with the materials and mixes you actually use.

Save and name your jobs
Reopen and edit any saved job
Duplicate a previous job
Search and filter by shape
Archive the ones you have finished
Track status, customer and site

Everything stays on your iPhone. No account, no sync, no server holding your jobs.

05 / Questions

Questions, answered.

Is it really free?

The calculator is free to use, with no account and no card to enter before you start.

Does it work without signal?

Completely. Everything runs on your iPhone, so it works down a hole or in the middle of a field with no connection.

What can it work out?

Volume, litres, bag count, mix, waste, estimated weight and cost for slabs, footings, post holes, columns, steps and ring bases.

Do you track me?

No advertising identifiers, no data brokers, and no account to create. Anonymous product analytics are off unless you switch them on in Settings, and your jobs stay on your phone either way.

Can I keep the jobs I work out?

Saving, reopening, duplicating, searching and archiving jobs is what Premium adds. Your bag prices and mix ratios are free.

Ready when you are.

Slab, footing & bag estimator. Free on the App Store and built in Britain for the trades.

No account · No tracking · Works offline on site