Disclaimer
For adults (18+), using 2017 ACC/AHA categories. Diagnosis of hypertension needs the average of two or more properly measured readings on two or more occasions, confirmed by a clinician; not for children or pregnancy. If a reading is above 180/120 with chest pain, breathlessness, weakness, vision or speech changes, call emergency services. This is educational information, not medical advice.
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No. Blood Pressure Checker is free, with no signup required, and nothing you enter leaves your browser.
Blood Pressure Checker is built on published formulas and reference ranges from established health sources. We revisit it periodically as guidance evolves; the "Last reviewed" date above shows when that last happened. If something looks wrong, tell us with the feedback button in the bottom-right corner.