Overview
Measuring your blood pressure is a simple step that gives you useful information about how your heart and circulatory system are doing. With the right monitor and a consistent technique, home readings can help you understand patterns in your numbers over time.
Blood pressure is recorded as two values: the systolic pressure (the upper number, when your heart beats and pushes blood out) and the diastolic pressure (the lower number, when your heart rests between beats). Both numbers are reported in millimeters of mercury (mmHg).
Types of Blood Pressure Monitors
There are two main categories of monitors used at home and in clinical settings. Each has strengths depending on your needs and comfort level.
Digital Monitors
Digital monitors are the most common choice for home use. They are automatic, easy to read, and available in upper-arm or wrist models. Many pair with smartphone apps and can sync to Apple Health and compatible BP monitors.
Manual Monitors
Manual (aneroid) monitors use a cuff, a stethoscope, and a dial gauge. They are commonly used in clinics and by trained users who want precise readings without relying on batteries or electronics.
Choosing a Monitor
Look for a validated upper-arm cuff sized to your arm, a clear digital display, and the ability to store or export your readings. Wrist monitors are portable but can be more sensitive to body position.
How to Measure Accurately at Home
Consistent technique matters as much as the device you choose. A few small adjustments can make home readings far more reliable.
- Rest for at least 5 minutes before taking a reading, in a quiet room.
- Sit with your back supported, feet flat on the floor, and legs uncrossed.
- Place the cuff on a bare upper arm at heart level.
- Avoid caffeine, exercise, and smoking for 30 minutes beforehand.
- Take two or three readings one minute apart and record the average.
- Measure at the same times each day, such as morning and evening.
Interpreting Your Readings
Readings are grouped into categories that help you and your clinician see where you stand. The site references the 2023 ESH and 2017 ACA/AHA guidelines, and lists the following categories:
| Category | Systolic (mmHg) | Diastolic (mmHg) |
|---|---|---|
| Hypotension (Low) | Below 90 | and/or below 60 |
| Optimal | Below 120 | and below 80 |
| Normal | 120–129 | and 80–84 |
| High Normal / Elevated | 130–139 | or 85–89 |
| Hypertension Stage 1 | 140–159 | or 90–99 |
| Hypertension Stage 2 | 160–179 | or 100–109 |
| Hypertension Stage 3 | 180 or higher | and/or 110 or higher |
Categories are provided for general information. A single high reading does not diagnose high blood pressure — consistent patterns over time matter, and a clinician can interpret your results in context.
Where to Get Your Blood Pressure Checked
You can have your blood pressure measured in several settings, each with its own advantages:
- At a clinic or hospital during a routine appointment.
- At a pharmacy, where many locations have self-service cuffs.
- At home with a validated personal monitor.
- Through workplace wellness screenings or community health events.
For a complete picture, home readings taken over days or weeks can complement in-clinic checks.
When to Seek Medical Attention
Reach out to a healthcare professional if you notice consistent readings in the Hypertension Stage 1 range or higher, or if you experience symptoms such as severe headache, chest pain, shortness of breath, visual changes, or sudden weakness. A sudden reading at or above 180/120 mmHg is a medical emergency and warrants immediate care.
Trust your instincts: if something feels wrong, contact a clinician rather than waiting for a number on a screen.
Track and Share Your Readings
Keeping a log of your measurements makes patterns easier to spot. The site's free BPExp app works on iPhone and Android, integrates with Apple Health and compatible BP monitors, and lets you export data in PDF and CSV formats to share with your clinician.
