Home measurement guide

How to take accurate blood pressure readings at home

A careful step-by-step guide to preparing, positioning your arm and cuff, taking repeat measurements, and avoiding common home blood pressure mistakes.

7 minute guideReviewed against primary sources: August 26, 2026

Accurate home readings depend on a validated upper-arm monitor, the correct cuff size, five quiet minutes of rest, supported posture, and consistent technique.

Prepare before you measure

  • Use a validated automatic upper-arm monitor with the correct cuff size.
  • Avoid smoking, caffeine, and exercise for 30 minutes before measuring.
  • Empty your bladder and rest quietly for at least five minutes.
  • Measure on bare skin rather than over clothing.

Use a supported position

  • Sit with your back supported and both feet flat on the floor.
  • Keep your legs uncrossed.
  • Support your arm on a flat surface so the middle of the cuff is at heart level.
  • Stay still and do not talk, text, or watch something stressful during the measurement.

Take and record the reading

Follow the monitor instructions and the schedule provided by your healthcare professional. The American Heart Association recommends taking two readings one minute apart and recording the results when monitoring at home.

  • Use the same arm unless a healthcare professional tells you otherwise.
  • Measure at approximately the same times on tracking days.
  • Record both readings instead of selecting only the lower result.
  • Add brief notes only when they provide useful context, such as missed medication or unusual stress.

Common causes of inconsistent readings

Common issueBetter approach
Cuff over clothingPlace it on bare upper-arm skin
Unsupported armRest the arm at heart level
Talking or movingStay quiet and still
Wrong cuff sizeUse the size specified for your arm circumference
Measuring immediatelyRest quietly for five minutes first

Primary sources

We link directly to the organizations responsible for the medical guidance used on this page.

A useful next step

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