GFRC Precast Project Calculator

Answer questions to get your materials list

GFRC Precast Calculator

Question 1 of 8

What's your surface area?

Total horizontal area of your worktop in square metres.

Surface Area (m²)

Question 2 of 8

Is this an internal or external project?

Outdoor worktops require a thicker concrete core for durability.

Project Type

Internal External

Question 3 of 8

How will the worktop be made?

Shuttered lips reduce weight and materials while keeping a thick edge appearance. Full thickness is a simpler mould but heavier.

Construction Method

Full thickness pour

The concrete is the same thickness all the way through

Shuttered lip

A thin slab with a thicker visible edge at the front

Question 4 of 8

What's your thickness?

Minimum 20mm for internal, 30mm for external.

Thickness (mm)

Question 4 of 8

What's your core thickness?

Minimum 20mm for internal, 30mm for external.

Core Thickness (mm)

Question 5 of 8

What's your visible edge height?

This is the total height of the visible edge at the front.

Visible Edge Height (mm)

Question 6 of 8

What's your total edge length?

Measure all visible edges and add together in metres.

Total Edge Length (m)

Question 7 of 8

Choose your colour

Select the concrete colour for your project.

Off-White

Light Grey

Mid-Grey

Dark Grey

Pink

Question 8 of 8

Additional details

Tell us about openings and sealer finish.

Number of Openings (sinks, hobs, etc.)

Sealer Type

Question 9 of 9

Do you want extra for wastage?

We recommend adding 10% extra.

Yes, add 10% for wastage

Your Materials List

Everything you need for your GFRC precast project