How long do home blood pressure monitors stay accurate?

Most home blood pressure monitors stay accurate for 2 to 3 years, but their reliability depends on usage, care, and brand quality. After this period, calibration may drift and readings can become less precise. It’s recommended to get the device recalibrated every 1–2 years or compare its readings with a clinic monitor during routine checkups. Proper storage, correct cuff size, and regular battery replacement also help maintain accuracy longer.