Ufumbuzi Health tools

Blood pressure

Blood Pressure Interpreter

Enter the two numbers from your monitor and see what they mean, in plain language.

Free No sign-up Works offline Private by design

Your reading

mmHg

Use the two numbers your monitor shows. Sit quietly for five minutes before measuring.

Both numbers matter

The top number is the pressure when your heart beats; the bottom is the pressure when it rests. Both decide the category.

Your result will appear here

Enter a systolic and a diastolic value to see the category, what it means and what to do next.

Example: 118 / 76 mmHg

Categories at a glance

    Based on the 2017 ACC/AHA adult categories. The higher of the two numbers decides the category. Other guidelines and countries use different cut-offs.

    How to measure

    • Sit quietly for five minutes before the reading.
    • Keep your back supported, feet flat and arm at heart level.
    • Avoid caffeine, exercise and smoking for 30 minutes before.
    • Use the right cuff size and take two readings a minute apart.
    • Record both readings; one high reading is not a diagnosis.

    What this app does

    Blood Pressure Interpreter turns the two numbers from your monitor into a plain-language category. It does not measure your blood pressure; it helps you understand a reading you already have.

    Read the two numbers

    Systolic is the top number: the pressure when the heart beats. Diastolic is the bottom number: the pressure when the heart rests between beats. Both are used, not just the top one.

    See the category

    The app uses the 2017 ACC/AHA adult categories and flags low readings as well. The higher of the two numbers decides the category.

    Keep a private history

    Each saved reading stays in this browser, with a chart, the latest value and the average. Print a clean report or save it as a PDF for an appointment.

    How to use it

    1. Enter the systolic and diastolic numbers from your monitor.
    2. Press Interpret reading to see the category and what to do next.
    3. Press Save reading to keep it on this device.
    4. Use Print / Save PDF to take the history to an appointment.

    A note on 120/80

    Under the 2017 ACC/AHA categories used here, normal is below 120/80. A reading of exactly 120/80 falls into stage 1 because the diastolic number is 80. Many older charts still call 120/80 normal; this app does not.

    What it does not do

    It is not a blood pressure monitor, a diagnosis or a treatment plan. It does not measure pulse, oxygen or arrhythmias, and it does not sync to the cloud. The categories are for adults; children, pregnancy and dialysis need different guidance. Do not change medication based on this app.

    The categories follow the 2017 ACC/AHA guideline. The American Heart Association explains the numbers in more detail. For body measurements, try the body measurement calculator; for medication schedules, the MedicApp.

    Frequently asked questions

    What do the systolic and diastolic numbers mean?

    Systolic is the top number and measures the pressure in your arteries when the heart beats. Diastolic is the bottom number and measures the pressure when the heart rests between beats. Both numbers are used to classify a reading.

    Why is 120/80 stage 1 in this app?

    The app follows the 2017 ACC/AHA categories, where normal is below 120/80. At exactly 120/80 the diastolic number is 80, which is the start of stage 1. Some older charts use different cut-offs.

    Is one high reading a diagnosis?

    No. A single reading is a snapshot and can be affected by stress, caffeine, exercise or the way you measured. Repeat the reading, record both values and discuss the pattern with a healthcare professional.

    Does the app work offline and where is my history stored?

    Yes. After the first load the app is cached and works without a connection. Readings are stored only in this browser on your device; there is no account, no advertising and no server upload. Clearing browser data deletes the history.

    How do I print or save the history as a PDF?

    Open the history and press Print / Save PDF. Your browser's print dialog opens; choose your printer or “Save as PDF”. The report includes the date, both numbers and the category for every saved reading.

    Blood Pressure Interpreter help

    Quick start

    1. Enter the systolic (top) and diastolic (bottom) numbers from your monitor.
    2. Press Interpret reading. The app shows the category and a short explanation.
    3. Press Save reading to keep it in the history on this device.

    Categories used here

    • Normal: below 120/80.
    • Elevated: 120–129 and below 80.
    • Stage 1: 130–139 or 80–89.
    • Stage 2: 140 or higher or 90 or higher.
    • Crisis: above 180 or above 120.
    • Low: either number below 90/60, when no high category applies.

    These are the 2017 ACC/AHA adult categories. The higher of the two numbers decides the category.

    Measuring well

    • Sit quietly for five minutes, with your back supported and feet flat.
    • Rest your arm at heart level and use the right cuff size.
    • Avoid caffeine, exercise and smoking for 30 minutes before.
    • Take two readings a minute apart and record both.

    Privacy and offline use

    Readings stay in this browser. Nothing is uploaded and there is no account. After the first load the app works without a connection. Clearing browser data deletes the history.