1.5 Bowl Kitchen Sinks: The Flexible Choice for Everyday Kitchens
A 1.5 bowl kitchen sink gives you the best of both worlds.
You get a full-size main bowl for washing up, rinsing pans and handling larger items, plus a smaller half bowl for the extra jobs that happen around it. That second half bowl may look simple, but it can make a kitchen much easier to use day to day.
For many UK homes, a 1.5 bowl sink is the practical middle ground between a single bowl and a double bowl sink. It gives you more flexibility than a single without needing as much space as two full bowls.
What Is a 1.5 Bowl Kitchen Sink?
A 1.5 bowl kitchen sink has one full-size main bowl and one smaller half bowl.
The main bowl is used for washing dishes, filling pans, rinsing trays and everyday cleaning. The half bowl sits beside it and gives you extra space for smaller tasks, such as rinsing food, draining water or using a waste disposal unit.
Many 1.5 bowl sinks also include a drainer, although drainer-free designs are available too, especially for more modern or undermount installations.
What Is the Half Bowl For?
The half bowl is what makes this sink format so useful.
It gives you a separate space for smaller kitchen tasks while keeping the main bowl free. This is especially helpful when the main bowl is full of washing-up water or larger items.
Rinsing Food
The half bowl is ideal for rinsing fruit, vegetables and salad leaves.
You can use it with a colander while the main bowl stays free for dishes, pans or other tasks.
Draining Pans
A half bowl is handy when you need to drain water from a pan, rinse utensils or empty a cup while the main bowl is occupied.
It gives you somewhere practical to pour without interrupting the main washing-up area.
Defrosting Food
You can use the half bowl to defrost smaller items safely and neatly.
It keeps the food contained and away from the main bowl, which is useful in a busy kitchen.
Food Waste Disposal
Some 1.5 bowl sinks can be used with a waste disposal unit fitted to the smaller bowl.
This allows food waste to be cleared quickly while keeping the main bowl available for washing and rinsing. Always check the sink specification and waste disposal compatibility before ordering.
Why Choose a 1.5 Bowl Sink?
A 1.5 bowl sink is popular because it adds useful flexibility without taking over the worktop.
It is a strong choice for everyday kitchens, especially where you want more than a single bowl but do not have room for a full double bowl layout.
More Flexible Than a Single Bowl
A single bowl sink gives you one large washing area, which is useful for big pans and trays.
A 1.5 bowl sink adds a second smaller area, making it easier to rinse, drain and prep without waiting for the main bowl to be empty.
More Compact Than a Double Bowl
A double bowl sink gives you two full bowls, but it usually needs more cabinet width and worktop space.
A 1.5 bowl sink offers some of that extra functionality in a more compact format, making it suitable for many standard kitchens.
Good for Everyday Family Use
In a busy household, the half bowl can be used constantly.
Someone can rinse vegetables while another person washes dishes. You can empty a cup while the main bowl is full. You can keep food prep separate from washing up. These small conveniences are what make a 1.5 bowl sink so useful over time.
1.5 Bowl vs Single Bowl Sink
A single bowl sink is simple and spacious.
It is a good choice if you regularly wash large trays, stock pots or oven racks, or if your kitchen is very compact. The trade-off is that you only have one bowl, so rinsing, draining and washing all happen in the same space.
A 1.5 bowl sink gives you a little more flexibility. The main bowl still handles larger jobs, while the half bowl gives you somewhere separate for smaller tasks.
Choose single bowl if you want the largest uninterrupted washing space. Choose 1.5 bowl if you want more everyday convenience.
1.5 Bowl vs Double Bowl Sink
A double bowl sink gives you two full-size bowls.
This can be useful in busy kitchens where two washing or rinsing tasks happen at the same time. It can also suit larger households and keen cooks.
The trade-off is space. A double bowl sink usually needs a wider base cabinet and more worktop room.
A 1.5 bowl sink is the more compact option. It gives you a useful second bowl without needing the full width of a double.
Choose double bowl if you have the space and regularly need two full bowls. Choose 1.5 bowl if you want flexibility in a standard kitchen layout.
What Size Cabinet Do You Need?
Most 1.5 bowl kitchen sinks need a sink cabinet of around 600mm or wider.
The exact requirement depends on the sink design, bowl layout and installation type. Always check the product specification before ordering, as some larger models may need more space.
You should also check the overall sink width, bowl depth, worktop cut-out size and whether the sink includes a drainer.
Measuring for a 1.5 Bowl Sink
Before choosing a sink, measure the base cabinet and worktop carefully.
Check the Cabinet Width
Measure the internal width of the sink cabinet.
The sink bowls need to fit within the cabinet below, not just on the worktop above. If the bowl configuration is too wide, it may interfere with cabinet sides, plumbing or other fittings.
Check the Worktop Space
Look at the worktop area around the sink.
Make sure there is enough space for the sink, drainer and tap. If the sink sits close to a hob, wall or tall unit, check that the drainer will not feel cramped.
Check the Bowl Depth
Deeper bowls can be useful for pans and larger dishes, but they may affect the space available under the sink.
If you need room for bins, cleaning products or a waste disposal unit below, check the depth carefully.
Check the Tap Holes
Some sinks come with pre-drilled tap holes, while others may be reversible or need a tap hole knocked through.
Make sure the sink will work with your chosen kitchen tap and the side you want the main bowl, half bowl and drainer to sit on.
Can the Half Bowl Go on Either Side?
Many 1.5 bowl kitchen sinks are reversible.
This means you can install the half bowl on the left or right, depending on your kitchen layout and plumbing. Reversible designs are especially useful when you need the drainer to sit on a particular side.
Not every sink is reversible, so always check the product details before ordering.
Choosing a 1.5 Bowl Sink Material
1.5 bowl sinks are available in a range of materials, so you can choose the look and level of maintenance that suits your kitchen.
Stainless Steel 1.5 Bowl Sinks
Stainless steel is a practical and popular choice.
It is durable, easy to clean and works well in both modern and traditional kitchens. It is also a good match for many taps, appliances and accessories.
Granite Composite 1.5 Bowl Sinks
Granite composite sinks offer a more matt, textured finish.
They are available in colours such as black, grey, white and neutral tones, making them a strong choice if you want the sink to feel more integrated with the worktop.
Ceramic 1.5 Bowl Sinks
Ceramic sinks have a classic, clean look.
They work well in traditional, shaker and country-style kitchens, but can also suit modern spaces depending on the design. Ceramic is hard-wearing and easy to wipe clean, although it can feel heavier and more substantial than other materials.
With or Without a Drainer?
Many 1.5 bowl sinks include a drainer, which is useful for everyday washing up.
A drainer gives you somewhere to dry dishes, rest pans or place rinsed vegetables. It is practical in busy kitchens and homes without a dishwasher.
Drainer-free designs can look cleaner and more minimal, especially with undermount or modern sinks. They may suit kitchens where you use a dishwasher often and want more uninterrupted worktop space.
1.5 Bowl Kitchen Sink FAQs
What is the half bowl on a 1.5 bowl sink for?
The half bowl is useful for rinsing vegetables, draining pans, defrosting food, emptying cups or fitting a waste disposal unit. It keeps the main bowl free for washing up and larger tasks.
Is a 1.5 bowl sink worth it?
Yes, for many kitchens. A 1.5 bowl sink gives you more flexibility than a single bowl without needing as much space as a double bowl. It is a practical everyday choice for many UK homes.
What size cabinet does a 1.5 bowl sink need?
Most 1.5 bowl sinks need a 600mm or wider sink cabinet, but this depends on the product. Always check the cabinet size, bowl dimensions and cut-out requirements before ordering.
Can I put the half bowl on either side?
Many 1.5 bowl sinks are reversible, so the half bowl can be fitted on the left or right. Some models are fixed, so check the product specification before buying.
Is a 1.5 bowl sink better than a single bowl?
A 1.5 bowl sink is better if you want a separate space for rinsing, draining or food prep. A single bowl may be better if you want one large uninterrupted bowl for bigger pans and trays.
Is a 1.5 bowl sink better than a double bowl?
A 1.5 bowl sink is more compact than a double bowl and suits many standard kitchens. A double bowl is better if you have the cabinet space and regularly need two full-size bowls.
Choose the Right 1.5 Bowl Kitchen Sink at Plumbworld
A 1.5 bowl kitchen sink is a flexible, practical choice for everyday kitchens.
It gives you a full-size main bowl for washing up and a smaller half bowl for rinsing, draining, defrosting or food waste. It suits many standard kitchen layouts and is available in stainless steel, granite composite and ceramic finishes, with or without a drainer.
Browse Plumbworld’s 1.5 bowl kitchen sinks, single bowl kitchen sinks, double bowl kitchen sinks and kitchen sinks to find the right fit for your home.
Plumbworld has been helping customers improve their homes since 1999, with free standard UK delivery, a price match promise, 365-day returns and a 4.8/5 Trustpilot rating from more than 75,000 reviews.