Calculators

Outdoor Aggregates’ full range of material calculators, built to British trade standards with current 2026 material pricing estimates. What are you working on? Browse or tap a project to see our calculators for it.

Driveway

Every layer of a new drive, and what it costs.

Open calculator

Patio

Slabs plus the base and mix under them.

Open calculator

Shed base

Concrete, slab, grid or timber base for a shed.

Open calculator

Artificial grass

Grass and the base layers underneath.

Open calculator

Turf

Rolls of turf and the soil to lay them on.

Open calculator

Sandpit project

Everything to build a sandpit, from the dig to the lid.

Open calculator

Soakaway size

Pit size, stone and membrane.

Open calculator

Gravel

Tonnes and bags of decorative or driveway gravel.

Open calculator

Self binding gravel

Stone for a firm, bound path or drive.

Open calculator

MOT Type 1 sub-base

The base layer under drives, paths and patios.

Open calculator

Grano dust

The fine bedding layer under slabs, paths and grass.

Open calculator

Ballast & cement

Concrete for footings, fence posts and steps, to the bag.

Open calculator

Sand

Sharp or building sand in kg and bulk bags, for any size and depth.

Open calculator

Wood chip & bark

Litres and bags of bark for beds and paths.

Open calculator

Play bark

Safe depth and bags under swings and frames.

Open calculator

Play sand

Kilos of play sand for a sandpit.

Open calculator

Topsoil

Soil for new lawns and beds.

Open calculator

Compost

Feeding borders and filling raised beds.

Open calculator

Paving slab

How many slabs for a patio, path or area.

Open calculator

Tile

How many tiles for your area.

Open calculator

Gravel

Tonnes and bags of decorative or driveway gravel.

Open calculator

Self binding gravel

Stone for a firm, bound path or drive.

Open calculator

MOT Type 1 sub-base

The base layer under drives, paths and patios.

Open calculator

Driveway

Every layer of a new drive, and what it costs.

Open calculator

Sand

Sharp or building sand in kg and bulk bags, for any size and depth.

Open calculator

Gravel

Tonnes and bags of decorative or driveway gravel.

Open calculator

Self binding gravel

Stone for a firm, bound path or drive.

Open calculator

MOT Type 1 sub-base

The base layer under drives, paths and patios.

Open calculator

Grano dust

The fine bedding layer under slabs, paths and grass.

Open calculator

Wood chip & bark

Litres and bags of bark for beds and paths.

Open calculator

Paving slab

How many slabs for a patio, path or area.

Open calculator

Tile

How many tiles for your area.

Open calculator

Gravel

Tonnes and bags of decorative or driveway gravel.

Open calculator

Self binding gravel

Stone for a firm, bound path or drive.

Open calculator

MOT Type 1 sub-base

The base layer under drives, paths and patios.

Open calculator

Grano dust

The fine bedding layer under slabs, paths and grass.

Open calculator

Sand

Sharp or building sand in kg and bulk bags, for any size and depth.

Open calculator

Patio

Slabs plus the base and mix under them.

Open calculator

Paving slab

How many slabs for a patio, path or area.

Open calculator

Tile

How many tiles for your area.

Open calculator

Gravel

Tonnes and bags of decorative or driveway gravel.

Open calculator

Wood chip & bark

Litres and bags of bark for beds and paths.

Open calculator

Topsoil

Soil for new lawns and beds.

Open calculator

Compost

Feeding borders and filling raised beds.

Open calculator

Play bark

Safe depth and bags under swings and frames.

Open calculator

Play sand

Kilos of play sand for a sandpit.

Open calculator

Sandpit project

Everything to build a sandpit, from the dig to the lid.

Open calculator

MOT Type 1 sub-base

The base layer under drives, paths and patios.

Open calculator

Grano dust

The fine bedding layer under slabs, paths and grass.

Open calculator

Sand

Sharp or building sand in kg and bulk bags, for any size and depth.

Open calculator

Topsoil

Soil for new lawns and beds.

Open calculator

Turf

Rolls of turf and the soil to lay them on.

Open calculator

Artificial grass

Grass and the base layers underneath.

Open calculator

Soakaway size

Pit size, stone and membrane.

Open calculator

MOT Type 1 sub-base

The base layer under drives, paths and patios.

Open calculator

Grano dust

The fine bedding layer under slabs, paths and grass.

Open calculator

Ballast & cement

Concrete for footings, fence posts and steps, to the bag.

Open calculator

Sand

Sharp or building sand in kg and bulk bags, for any size and depth.

Open calculator

Patio

Slabs plus the base and mix under them.

Open calculator

Paving slab

How many slabs for a patio, path or area.

Open calculator

Tile

How many tiles for your area.

Open calculator

Shed base

Concrete, slab, grid or timber base for a shed.

Open calculator

Gravel

Tonnes and bags of decorative or driveway gravel.

Open calculator

Self binding gravel

Stone for a firm, bound path or drive.

Open calculator

MOT Type 1 sub-base

The base layer under drives, paths and patios.

Open calculator

Grano dust

The fine bedding layer under slabs, paths and grass.

Open calculator

Driveway

Every layer of a new drive, and what it costs.

Open calculator

Ballast & cement

Concrete for footings, fence posts and steps, to the bag.

Open calculator

Sand

Sharp or building sand in kg and bulk bags, for any size and depth.

Open calculator

Wood chip & bark

Litres and bags of bark for beds and paths.

Open calculator

Play bark

Safe depth and bags under swings and frames.

Open calculator

Play sand

Kilos of play sand for a sandpit.

Open calculator

Sandpit project

Everything to build a sandpit, from the dig to the lid.

Open calculator

Topsoil

Soil for new lawns and beds.

Open calculator

Compost

Feeding borders and filling raised beds.

Open calculator

Patio

Slabs plus the base and mix under them.

Open calculator

Paving slab

How many slabs for a patio, path or area.

Open calculator

Tile

How many tiles for your area.

Open calculator

Shed base

Concrete, slab, grid or timber base for a shed.

Open calculator

Turf

Rolls of turf and the soil to lay them on.

Open calculator

Artificial grass

Grass and the base layers underneath.

Open calculator

Soakaway size

Pit size, stone and membrane.

Open calculator