Standard Kitchen Benchtop Dimensions: Depth, Overhang & Thickness

Reviewed by Clarrie King, licensed stonemason · Premier Stone, Drouin VIC · Updated June 2026

The standard kitchen benchtop depth in Australia is about 600mm from front to back, made up of a 560mm to 580mm base cabinet plus a 20mm to 30mm front overhang. Benchtops are most often 20mm or 40mm thick. Island benches are deeper, usually 900mm to 1200mm, because they are reached from both sides. These figures cover most Australian kitchens.

The standard kitchen benchtop depth in Australia is about 600mm to 650mm from front to back, made up of a 560mm to 600mm base cabinet plus a 20mm to 30mm front overhang. Benchtops are most often 20mm or 40mm thick. Island benches are deeper, usually 900mm to 1200mm, because they are reached from both sides. These figures cover most Australian kitchens.

Depth, overhang and thickness decide how a benchtop feels to work at and how well it fits your cabinets. This guide gives the standard measurements for each, plus island sizes, walkway clearances and the slab sizes your stone can be cut from. For bench height, see our separate guide on standard kitchen benchtop height.

Building a kitchen in Gippsland? Premier Stone templates every benchtop on site so the dimensions match your cabinets exactly. See our benchtop services →

What is the standard benchtop depth?

The standard benchtop depth is about 600mm from front to back. That figure is a base cabinet of 560mm to 580mm with a small front overhang of 20mm to 30mm so spills drip clear of the doors. A 600mm depth gives enough room to work in front of standard appliances and fit a kitchen sink without crowding the edge. Galley and small kitchens sometimes use a 560mm to 580mm benchtop to claw back floor space.

The standard benchtop depth is about 600mm to 650mm from front to back. That figure is a base cabinet of 560mm to 600mm with a small front overhang of 20mm to 30mm so spills drip clear of the doors. A 600mm depth gives enough room to work in front of standard appliances and fit a kitchen sink without crowding the edge. Galley and small kitchens sometimes use a shallower benchtop to claw back floor space.

What are the standard kitchen benchtop dimensions?

The table below lists the dimensions Australian kitchens are built to. Use them as a starting point, then adjust for your room, your appliances and how many people cook at once.

How much should a benchtop overhang?

A benchtop should overhang the cabinet front by 20mm to 30mm. That small lip keeps drips and crumbs off the door fronts and gives the edge a finished look. Where people sit at a breakfast bar, increase the overhang to 250mm to 300mm so there is comfortable knee room underneath; overhangs beyond about 300mm in stone usually need a support bracket or steel to stop the slab cracking.

A benchtop should overhang the cabinet front by 20mm to 30mm. That small lip keeps drips and crumbs off the door fronts and gives the edge a finished look. Where people sit at a breakfast bar, increase the overhang to 250mm to 300mm so there is comfortable knee room underneath. An overhang beyond about 300mm in stone usually needs a support bracket or steel to stop the slab cracking.

How deep should a kitchen island be?

A kitchen island is usually 900mm to 1200mm deep because it is worked from both sides. That depth lets you fit a sink or cooktop on one side and still leave clear prep space, or build seating into one edge. Keep at least 900mm of walkway around the island, and 1200mm where two cooks pass or where the dishwasher and oven doors swing open.

A kitchen island is usually 900mm to 1200mm deep because it is worked from both sides. A 900mm-deep island fits 600mm cabinetry on one side with a 300mm seating overhang, which is the most common layout. That depth lets you put a sink or cooktop on one side and still leave clear prep space. Keep at least 900mm of walkway around the island, and 1200mm where two cooks pass or where the dishwasher and oven doors swing open.

What slab sizes can stone benchtops be cut from?

Stone benchtops are cut from large-format slabs, so the slab size sets how long a run you can fabricate without a join. Sintered stone and porcelain slabs reach around 3200mm × 1600mm, large enough to run a full island or a waterfall edge from one piece. Natural stone slabs vary by quarry but are commonly in the range of 2700mm to 3200mm long. For a benchtop longer than a single slab, your stonemason places the join where it is least visible.

Frequently Asked Questions

What is the standard kitchen benchtop depth in Australia?

The standard kitchen benchtop depth in Australia is about 600mm from front to back. This is a 560mm to 580mm base cabinet plus a 20mm to 30mm front overhang over the cabinet doors. Island benches are deeper, usually 900mm to 1200mm, because they are accessed from both sides.

The standard kitchen benchtop depth in Australia is about 600mm to 650mm from front to back. This is a 560mm to 600mm base cabinet plus a 20mm to 30mm front overhang over the cabinet doors. Island benches are deeper, usually 900mm to 1200mm, because they are accessed from both sides.

How much should a benchtop overhang?

A benchtop should overhang the front of the cabinets by 20mm to 30mm so spills drip clear of the doors. For a breakfast bar where people sit, allow a larger overhang of 250mm to 300mm to give comfortable knee room under the bench.

A benchtop should overhang the front of the cabinets by 20mm to 30mm so spills drip clear of the doors. For a breakfast bar where people sit, allow a larger overhang of 250mm to 300mm to give comfortable knee room; overhangs beyond 300mm in stone usually need a support bracket.

How thick is a standard stone benchtop?

A standard stone benchtop is 20mm or 40mm thick. 20mm suits most modern kitchens and splashbacks; 40mm, usually created by mitring a 20mm slab, gives islands and bar tops a heavier look. Sintered stone and porcelain are also available in 12mm for vertical surfaces.