Best King Size Mattress on a Budget
Looking for a comfortable and affordable budget king size mattress? Whether you’re upgrading your current bed or moving into a new home, finding a king size mattress that fits your budget doesn’t have to be a challenge. With so many options available in the UK, you can still enjoy luxury and support without breaking the bank.
A king mattress size UK (5ft x 6ft 6in) offers ample space for both couples and solo sleepers, allowing you to stretch out and enjoy uninterrupted sleep. Designed with comfort and durability in mind, a good king mattress will provide you with everything you need for a restful night.
Check out our best budget king size mattresses that are perfect for anyone looking for the best budget king size mattress without compromising on quality.

Silentnight 1200 Eco Comfort Mattress
– 1200 Mirapocket Springs
– Eco Comfort Fibres™
– Zoned Support
– Motion Isolation
From £380.99 on Amazon (Price may vary)

SleepSoul Space 2000 Pocket Memory Pillow Top Mattress
– 2000 Pocket Springs
– Memory Foam
– Pillow Top Layer
– Orthopaedic Support
From £399 on MattressNextDay (Price may vary)
Budget King Size Mattress Buying Guide
If you’re looking for the best king size mattress on a budget, you’ll want to consider a few key factors to ensure you’re getting the best value for your money. Whether you’re interested in a king size memory foam, pocket sprung or orthopaedic mattress, knowing what to look for will help you make a smart purchase.
What is a good price for a king size mattress?
When shopping for a cheap king size mattress, prices can range from £250 to £800, depending on the material and brand. A good quality king size mattress typically falls between £350 and £500, offering the best balance of affordability and durability.
How much should I spend on a king size bed?
On average, king size mattress prices start at around £300 for a basic model, and can go up to £800 or more for premium options. If you’re looking for the cheapest king size mattresses, expect to pay less than £450 for a well-reviewed, budget-friendly mattress.
How long should a budget king size mattress last?
A budget king size mattress can last between 5 to 8 years, depending on the material and level of care. Investing in a mattress with a decent warranty will give you peace of mind, ensuring you don’t have to replace it too soon.
King Size Mattress FAQs
What Is a King Size Mattress?
A king size mattress in the UK typically measures 5ft x 6ft 6in, offering more space than a double mattress. It’s ideal for couples who need extra room for a comfortable night’s sleep or for solo sleepers who enjoy stretching out.
How wide is a king size mattress?
A king size mattress UK is 5ft (150 cm) wide, providing generous space for two people to sleep comfortably.
How thick should a king size mattress be?
The thickness of a king size mattress can range from 20 cm to 30+ cm, depending on the material used. A thicker mattress typically offers more comfort and support, especially if you prefer a memory foam king size mattress.
Benefits of a king size Mattress
A king size mattress provides ample space, making it perfect for couples or anyone who enjoys extra room. It’s also ideal for memory foam mattresses since the extra size allows the foam to contour to your body better, providing superior support.
What types of king size mattresses can I choose from
You’ll find a variety of options, from memory foam king size mattresses to pocket sprung king mattresses and even hybrid models. Each type offers different benefits, so think about your sleep preferences and budget when choosing.
Do you sleep better in a king bed?
Yes, a king size bed offers more space, which can improve sleep quality by reducing disturbances from a partner’s movements.
Is a king size bed overkill for one person?
While a king mattress size UK might feel too spacious for one person, many people find the extra room to be beneficial for a more comfortable, undisturbed sleep.
Do most couples have a king size bed?
Many couples prefer a king size or superking bed due to the extra space they provide, especially if both people are tall or have different sleeping preferences.
Do couples sleep better in a bigger bed?
Yes, couples often sleep better in a larger bed since there’s more room to move around without disturbing each other. A king size mattress helps with that.
Why are king size beds so expensive?
The average king size mattress price reflects the larger materials used in production and the higher demand for comfort and support.
Should I consider a super king mattress?
If you need even more space than a king size mattress, a super king mattress may be a better fit, especially for larger bedrooms. However, it comes at a higher price point.