If you’re wondering what mmHg compression socks you need, the short answer is this:
Most people do well with 15–20 mmHg for daily comfort, while 20–30 mmHg is used for medical or long-standing symptoms.
Compression socks are measured in millimeters of mercury (mmHg), which indicates how much pressure they apply to your legs. Choosing the right level matters: too little compression may be ineffective, while too much can feel uncomfortable or unnecessary if your needs are mild.
Understanding mmHg levels helps you avoid common mistakes and choose socks that actually support circulation, reduce swelling, and improve leg comfort.
Key takeaways:
- 15–20 mmHg is ideal for everyday use and mild leg fatigue
- 20–30 mmHg is typically used for medical or moderate circulation issues
- Higher compression is not always better and should match your situation
Compression socks work by applying graduated pressure, meaning the compression is strongest at the ankle and gradually decreases up the leg. This design helps push blood back toward the heart, supporting venous circulation and limiting fluid buildup.
What does mmHg actually mean?
The term mmHg refers to a standardized pressure measurement commonly used in medicine. When applied to compression socks, it tells you how firm the compression feels and how much support your veins receive.
Lower mmHg levels provide gentle support, while higher levels deliver stronger therapeutic compression. The key is matching the compression strength to your daily activities, symptoms, and overall leg health.
Why choosing the wrong compression level matters
Wearing compression socks that are too weak may result in:
- Little to no improvement in swelling
- Persistent leg heaviness
- Limited circulation support
On the other hand, socks that are too strong can:
- Feel overly tight or restrictive
- Be uncomfortable for long wear
- Be unnecessary if symptoms are mild
A practical rule is to start with the lowest effective compression and move up only if needed.
The most common compression levels explained
Before diving deeper into each category, here’s a quick overview of commonly used mmHg ranges:
| Compression level | Typical use |
| 8–15 mmHg | Light support, tired legs |
| 15–20 mmHg | Daily wear, mild swelling |
| 20–30 mmHg | Moderate medical needs |
| 30–40 mmHg | Clinical use, prescribed |
In the next section, we’ll break down who should choose each mmHg level, starting with the most popular option for everyday use.
15–20 mmHg or 20–30 mmHg: which one should you choose?
For most people asking what mmHg compression socks do I need, the decision usually comes down to 15–20 mmHg vs 20–30 mmHg.
15–20 mmHg: the everyday standard
This level is the most commonly recommended for daily use. It provides noticeable support without feeling restrictive.
Choose 15–20 mmHg if you:
- Sit or stand for long hours at work
- Experience tired or heavy legs at the end of the day
- Travel frequently (car, train, plane)
- Want preventive support without medical concerns
This range improves circulation gently and is comfortable enough to wear all day.
20–30 mmHg: stronger, more targeted support
20–30 mmHg offers firmer compression and is typically used when symptoms are more pronounced.
It’s better suited if you:
- Have moderate swelling or visible varicose veins
- Experience leg discomfort on a regular basis
- Are recovering from surgery or managing a diagnosed vein condition
Key point: If you’re unsure, start with 15–20 mmHg. You can always increase compression later if needed.
How your lifestyle affects the compression level you need
Your daily routine plays a major role in deciding what mmHg compression socks you need. The goal is to match compression to how much strain your legs experience.
When lower compression is enough
You generally don’t need high compression if you:
- Walk regularly throughout the day
- Have no visible swelling
- Only feel mild leg fatigue in the evening
In these cases, 15–20 mmHg is usually sufficient and comfortable for long wear.
When stronger compression makes sense
You may benefit from 20–30 mmHg if you:
- Stand or sit more than 8 hours a day
- Notice ankle or calf swelling by night
- Feel recurring leg heaviness or pressure
One important thing to know: using higher compression without a real need does not improve results. In some cases, it can reduce comfort and discourage consistent use.
A practical rule: comfort first, effectiveness second. Compression socks only help if you can wear them regularly.
How to choose the right mmHg compression socks
If you’re still asking what mmHg compression socks do I need, here’s a simple decision guide you can follow without overthinking it.
| Your situation | Recommended compression |
| Everyday leg fatigue | 15–20 mmHg |
| Long sitting or standing hours | 15–20 mmHg |
| Mild swelling by evening | 15–20 mmHg |
| Regular swelling or varicose veins | 20–30 mmHg |
| Medical vein condition | 20–30 mmHg (guided use) |
Higher compression is not automatically better. For most people, starting with 15–20 mmHg delivers enough support while staying comfortable for daily wear.
One last practical tip: if compression socks feel uncomfortable, tight behind the knee, or difficult to put on, the mmHg level may be too high for your needs.
Final takeaway
- 15–20 mmHg works for the majority of daily situations
- 20–30 mmHg is useful for moderate, persistent symptoms
- Comfort and consistency matter more than maximum pressure
If you choose the right level from the start, compression socks become an easy habit not a constraint.
