What Firmness Level Should I Choose for My Mattress?
Choosing the right mattress firmness is crucial for ensuring proper support, comfort, and spinal alignment. The firmness level affects how well your mattress conforms to your body, relieves pressure points, and supports your preferred sleeping position. This guide will help you determine which firmness level suits your needs best.
Understanding Mattress Firmness Levels
Mattress firmness is typically rated on a scale from 1 to 10, with 1 being the softest and 10 being the firmest. Here’s a breakdown of the common firmness levels:
- Soft (1-3): Highly plush and contouring, best for side sleepers and those who prefer a sinking-in sensation.
- Medium-Soft (4-5): Still contouring but with slightly more support, suitable for side sleepers who like a balance between softness and support.
- Medium-Firm (6-7): The most popular choice, offering a mix of support and comfort, ideal for back sleepers and combination sleepers.
- Firm (8-10): Provides the most support with minimal sinkage, best for stomach sleepers and heavier individuals who need extra support.

Choosing the Right Firmness Based on Sleeping Position
Your preferred sleeping position significantly impacts the firmness level you should choose.
Side Sleepers
- Recommended Firmness: Soft to Medium (3-5)
- Side sleepers need cushioning for the shoulders and hips to prevent pressure buildup. A softer mattress allows the body to sink slightly, maintaining spinal alignment.
Back Sleepers
- Recommended Firmness: Medium to Medium-Firm (5-7)
- A medium-firm mattress supports the lower back while allowing enough contouring to prevent discomfort. It helps maintain the natural curve of the spine.
Stomach Sleepers
- Recommended Firmness: Firm (7-9)
- Stomach sleepers require a firmer surface to prevent the hips from sinking too deep, which can cause lower back strain.
Combination Sleepers
- Recommended Firmness: Medium to Medium-Firm (5-7)
- Since combination sleepers switch positions throughout the night, a medium-firm mattress provides the versatility needed for various sleeping postures.

Choosing Firmness Based on Body Weight
Body weight also affects how a mattress feels and performs. A lighter person may find a medium-firm mattress too hard, while a heavier person may sink too much into a soft mattress.
Lightweight Sleepers (<130 lbs)
- Soft to Medium (3-6) is ideal since they don’t sink as deeply into the mattress.
Average Weight Sleepers (130-230 lbs)
- Medium to Medium-Firm (5-7) provides a balance of contouring and support.
Heavyweight Sleepers (>230 lbs)
- Medium-Firm to Firm (7-9) is recommended to prevent excessive sinkage and ensure durability.

Other Factors to Consider When Choosing Firmness
Beyond sleeping position and body weight, here are additional factors to keep in mind:
Health Considerations
- People with back pain often benefit from a medium-firm mattress, as it provides both support and comfort.
- Those with joint pain or arthritis may prefer a soft to medium mattressto relieve pressure on sensitive areas.
Mattress Type
Different mattress materials can alter the way firmness feels:
- Memory Foam: Tends to feel softer due to contouring.
- Innerspring: Feels firmer due to the coil support system.
- Hybrid: A mix of foam and coils, offering a balanced feel.
- Latex: Naturally firm and supportive with a responsive feel.
Sleep Partner Preferences
If you share your bed, a medium-firm mattress is a good compromise. Some couples opt for a split mattress or an adjustable mattress to accommodate different preferences.
Temperature Regulation
Soft mattresses tend to retain more heat, while firmer mattresses allow for better airflow. If you sleep hot, a medium-firm or firm mattress with cooling technology may be a better choice.

Final Thoughts
Choosing the right mattress firmness is essential for a good night’s sleep and overall health. Consider your sleeping position, body weight, personal preferences, and specific needs before making a decision. If unsure, a medium-firm mattress (5-7) is a safe choice, as it suits most people. Testing mattresses in-store or opting for brands with sleep trials can also help ensure you find the perfect fit.