What are the standard UK kitchen unit widths?

Standard UK kitchen unit widths are 300mm, 400mm, 500mm, and 600mm. Most suppliers including Howdens, Wickes, Magnet and IKEA use these increments. The 600mm unit is the most common as it aligns with standard appliance widths. Corner base units typically require 900-1000mm on each wall side.

How many hinges per kitchen door?

Most UK kitchen doors use 2-3 hinges per door. Doors up to 600mm high typically need 2 hinges, while doors over 600mm (such as full-height doors on tall units) need 3 hinges. Heavy solid wood doors may need an extra hinge. Standard concealed hinges (such as Blum 110-degree) are used in almost all modern kitchens.

What height should kitchen plinth be?

Standard UK kitchen plinth height is 150mm (roughly 6 inches). This sits between the bottom of the base units and the floor. Base units are typically 720mm high, plus a 150mm plinth, plus a 40mm worktop, giving a total working height of approximately 910mm which is standard in UK kitchens.

What is the difference between cornice and pelmet?

Cornice sits on top of wall units and provides a decorative finish where the units meet the ceiling or soffit. Pelmet fits underneath the wall units and often conceals under-cabinet lighting. Both are measured in linear metres and typically match the door style. Standard cornice is around 40-50mm deep and pelmet is 40-60mm.

Do I need filler panels in a kitchen?

Filler panels are essential where units meet walls, appliances, or corners at an angle. They ensure doors and drawers can open fully without catching on walls. A minimum 25mm filler is recommended at wall junctions. Corner units also need fillers to allow adjacent doors to open. Plan for at least 2 filler pieces per kitchen, plus one per corner.

TradeCalculator.co.uk

Kitchen Unit Calculator — Base, Wall & Tall Units

Calculate the number of base units, wall units, tall units, filler panels, plinth, cornice and hardware for your kitchen.

Kitchen LayoutSelect your kitchen configuration

Base Unit Width600mm is standard for most kitchens

Run A Length

Main wall run length

Run B Length

Second run length

Wall Unit Height720mm is standard for most kitchens

Include corner units

L-shape and U-shape layouts require corner units

Include tall units (larder/oven housing)

Tall units for larder, fridge, or oven housing

Number of Tall Units

Typically 1-2 for fridge and oven housing

How We Calculate This

This calculator estimates the number of kitchen units needed based on your room layout and run lengths. It calculates base units, wall units, tall units, corner units, filler panels and all associated hardware.

How it works

Base units: Total run length divided by unit width, minus space for corner units, sink unit and oven housing
Wall units: Run length minus window and oven housing areas, divided by unit width
Corner units: One per corner in L-shape or U-shape layouts, consuming 900mm per side
Hardware: Hinges calculated at 2-3 per door, handles for all doors plus drawer fronts

Quantities are based on standard UK kitchen unit sizes from major suppliers. Always consult your kitchen designer for exact specifications.

Frequently Asked Questions

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Last updated: March 2026

All calculations are estimates. Verify with your supplier.