Home Blood Pressure Monitors: How to Choose a Validated One
Last checked November 2026. Offers and rules change: confirm with the provider before you rely on them.
For checking blood pressure at home, choose an automatic upper-arm monitor that has been independently validated for accuracy, with a cuff that fits your arm. You do not need the dearest model: accuracy and the right cuff matter far more than extra features.
Who a home monitor helps
Your GP, nurse or pharmacist may suggest home readings if you have high blood pressure, are starting or changing treatment, or get higher readings in the surgery than elsewhere. Some people simply like to keep an eye on things. This guide is about choosing a monitor; it is not medical advice. What your readings mean for you, and what to do about them, is a question for your GP practice or pharmacist.
Check it is validated
"Validated" means the monitor has been tested against an agreed scientific standard and shown to give accurate results. Not every monitor on sale has been.
The British and Irish Hypertension Society (BIHS), a professional body for blood pressure specialists, publishes a free list of validated monitors for home use. Before you buy, look up the exact make and model on the BIHS list of validated monitors. The list is about accuracy only; it does not rate price or ease of use. The charity Blood Pressure UK also has plain-English advice on choosing and using a monitor.
Upper arm or wrist?
| Type | Good points | Drawbacks |
|---|---|---|
| Upper-arm (automatic) | The type UK health charities recommend; generally the most reliable and consistent | Cuff must be the right size; can be awkward to put on one-handed |
| Wrist | Small; an option if an upper-arm cuff cannot be used | Readings are more easily thrown off by wrist position; generally less reliable |
| Finger | None for home monitoring | Not recommended |
Blood Pressure UK advises choosing a monitor that measures at the upper arm rather than the wrist or finger. If you cannot use an upper-arm cuff, for example because of arm size, shape or pain, ask your nurse or pharmacist what they suggest.
Getting the cuff size right
A cuff that is too small tends to give a falsely high reading; too large, a falsely low one. Measure round your upper arm at the midpoint between shoulder and elbow with a tape measure, then check the range printed on the cuff or box.
- Most monitors come with a medium (standard) cuff. Typical ranges are roughly 22cm to 32cm, but they vary by maker.
- If your arm is larger or smaller than the range, buy a monitor supplied with the right cuff, or check a compatible cuff is sold separately.
- "Wide-range" cuffs cover a larger span, often about 22cm to 42cm.
What else to look for
- A large, clear display with good contrast; backlit if your sight is poor. Talking monitors read the result aloud.
- One-button operation.
- Memory for past readings, with date and time, and two user profiles if a couple will share it.
- Averaging of several readings, which some surgeries ask for.
- Irregular heartbeat indicator — some monitors flag a possibly irregular pulse. This is a prompt to mention it to your GP, not a diagnosis. If you have an irregular heart rhythm such as atrial fibrillation, ask your surgery which type of monitor is suitable.
- Mains adaptor as well as batteries.
Rough price guide
- Basic validated upper-arm monitor: from around £20 to £35.
- Mid-range with larger display, memory for two users and wide-range cuff: around £35 to £70.
- Models with Bluetooth, apps or extra heart-rhythm features: around £60 to £150.
- Replacement or different-size cuff: around £10 to £25.
A rough guide only. A basic model on the validated list is a sound choice; you are not buying extra accuracy by paying more.
Using it well: general pointers
Follow the instructions with your monitor and any your surgery gives you. Common general advice is to:
- sit quietly for five minutes first, back supported, feet flat on the floor, legs uncrossed;
- rest your arm on a table so the cuff is at about heart level, on bare skin or a thin sleeve;
- avoid measuring straight after eating, smoking, caffeine or exercise, or when you need the toilet;
- stay still and do not talk while it measures;
- take readings at the same times of day and write them down exactly as shown.
The NHS has guidance on high blood pressure and checking it at home.
Mistakes to avoid
- Buying on price or star ratings without checking the validated list.
- Using the standard cuff when your arm is outside its range.
- Buying second-hand: you cannot tell how it has been treated.
- Changing or stopping medicines because of home readings without speaking to your doctor or pharmacist.
Free checks and borrowing a monitor
You may not need to buy one at all. Many community pharmacies in England offer a free NHS blood pressure check to people aged 40 and over who have not already been diagnosed with high blood pressure; the NHS website has a pharmacy finder. Some GP practices and pharmacies lend monitors for a week of home readings. Arrangements differ in Scotland, Wales and Northern Ireland, so ask your surgery or pharmacy.
Related guides
See pill organisers for keeping track of medicines, free prescriptions and eye tests for health costs, fall detection watches for wearable safety devices, and buying on marketplaces for avoiding unbranded health gadgets.
Common questions
Are home blood pressure monitors accurate?
A validated upper-arm monitor, used correctly with the right size cuff, gives readings your doctor can use. Unvalidated devices may not.
Are wrist monitors any good?
They are generally less reliable because the wrist must be held at heart level. They are a fallback if an upper-arm cuff cannot be used; choose a validated one.
Can I get a monitor free on the NHS?
They are not generally prescribed, but some practices and pharmacies lend them. Ask before you buy.