Blood Pressure Log & Trend Tracker
This blood pressure log automatically calculates your true average using the AHA’s recommended protocol (discarding the first reading), classifies your BP using the 2017 ACC/AHA guidelines, and screens for white-coat hypertension by comparing your home average against your office reading. Office measurements are notoriously unreliable — the diagnosis of hypertension should rest on a properly logged home record. Enter 3 to 50 readings below. Your data stays in your browser; nothing is uploaded.
Add a Reading
Logged Readings (0)
Optional: Compare Against an Office Reading
Highest Systolic
—
Lowest Systolic
—
Variability
—
Trend
—
Your Trend Over Time
💡 In My Practice
—
⚠️ Seek Immediate Medical Attention
- If any single reading is above 180/120 mmHg AND you have chest pain, severe headache, vision changes, shortness of breath, weakness, or trouble speaking → call 911 (or 999/112) immediately. This is hypertensive emergency.
- If readings consistently above 180/120 mmHg WITHOUT symptoms → go to an urgent care or ER the same day.
- Sudden severe headache that feels different from any headache you’ve had before
- Nosebleeds combined with very high readings
Your Next Steps
Download Your Free BP Tracking Template
Get Dr. Khalid’s complete Blood Pressure & Kidney Protection Guide — a printable PDF with a 4-week BP log template, target ranges by age, and a what-to-do-if-it’s-high decision tree.
🔒 Nothing you enter is stored, logged, or sent to any server. All readings stay in your browser only.
Frequently Asked Questions
How many blood pressure readings do I need before averaging?
For a reliable home blood pressure average, the American Heart Association recommends at least 12 readings taken over a minimum of 7 days — ideally morning and evening, two readings each session, with the first reading discarded. This calculator works with anywhere from 3 to 50 readings, but the more readings you log over a longer period, the more reliable the diagnosis. A single reading, even if very high, is rarely enough to start treatment. Read our guide to BP numbers.
What is white-coat hypertension and how does this tool detect it?
White-coat hypertension is when your BP is high in the doctor’s office but normal at home — it affects roughly 1 in 5 patients diagnosed as hypertensive on office readings alone. This tool detects it by comparing your home average against any office reading you provide; if the office systolic is more than 15 mmHg higher than your home average, it flags possible white-coat effect. The clinical importance is significant — patients with true white-coat hypertension often don’t need lifelong medication. Read our full white-coat hypertension explainer.
What blood pressure should I be aiming for?
The 2017 ACC/AHA guidelines define normal as below 120/80 mmHg, elevated as 120–129 systolic with diastolic below 80, Stage 1 hypertension as 130–139/80–89, and Stage 2 hypertension as 140+/90+. Treatment targets depend on age, kidney function, and cardiovascular risk — most patients aim for under 130/80, while older patients with frailty may aim for under 140/90. Discuss your individual target with your doctor. See our guide to lowering BP naturally.
Should I use a wrist or upper-arm BP monitor?
Always use an upper-arm cuff monitor for tracking. Wrist monitors are convenient but consistently less accurate, especially in patients with stiff arteries, obesity, or arrhythmias. The American Heart Association recommends upper-arm cuffs for all home tracking. Look for monitors validated by the AAMI or BHS. Our best home BP monitors review covers the top validated options.
What is masked hypertension?
Masked hypertension is the opposite of white-coat — your BP looks normal at the doctor’s office but is high at home. It is just as dangerous as sustained hypertension and often goes undiagnosed because no one is checking at home. This tool helps detect masked hypertension when your home average is significantly higher than your office reading. If you suspect this, ask your doctor about 24-hour ambulatory blood pressure monitoring (ABPM), which is the gold standard for diagnosis.