Two readings, with context

Blood pressure measurement check

Review two adult readings without turning a home measurement into a diagnosis. The card accounts for measurement setup and applies separate pregnancy and recent-postpartum safety boundaries.

No diagnosisNo saved historyPregnancy-aware

Symptoms matter more than this card

Seek local emergency help now for chest pain, trouble breathing, new weakness or numbness, trouble speaking, seizure, fainting, or another severe sudden symptom. If pregnant or within 6 weeks after birth, urgent warning signs also include a severe or persistent headache, major vision change, pain below the ribs, vomiting or sudden swelling. Do not wait for this tool or for the pressure to fall.

Private input

Enter two readings

Measurement context

This card is for adults aged 18 or over. Children and teenagers need age- and size-specific clinical interpretation.

Readings taken at least 1 minute apart

Reading 1

Systolic 1 (mmHg)

Diastolic 1 (mmHg)

Reading 2

Systolic 2 (mmHg)

Diastolic 2 (mmHg)

Measurement setup I rested quietly for at least 5 minutes first. I sat with back supported, feet flat and legs uncrossed. A correctly sized upper-arm cuff was on bare skin, with the arm supported at heart level. I did not talk or use a phone during either reading.

I have one or more urgent symptoms listed in the warning above.

Privacy boundary

Nothing is saved or sent

Readings, context and symptom choices remain in this page's memory only. They are not written to localStorage or sessionStorage, put in a URL, sent to an account, analytics or an API. TXT and PDF are created locally after your explicit action. Health data appears in exports, so review the file before sharing it.

Threshold boundary

Different contexts use different prompts

General adult: WHO's 140/90 mmHg clinic threshold needs readings on two different days for diagnosis. A home pair is only a snapshot.
Very high adult reading: over 180 systolic or over 120 diastolic requires a repeat and immediate clinical contact if it remains that high; emergency symptoms require emergency help.
Pregnancy or first 6 weeks after birth: 140 systolic or 90 diastolic prompts maternity contact; 160 systolic or 110 diastolic is a severe boundary needing urgent assessment.

Official sources

Guidance checked for this card

WHO: Hypertension - adult diagnostic threshold and different-day confirmation.
American Heart Association: Home monitoring - technique, paired readings and over-180/120 response.
NICE NG133: Hypertension in pregnancy - 140/90 and severe 160/110 boundaries.
ACOG: Preeclampsia after childbirth - risk can extend up to 6 weeks postpartum.
NHS: Pre-eclampsia - pregnancy and postpartum warning symptoms.

Sources checked: 26 July 2026. Local services may use additional thresholds and instructions; follow your maternity or clinical team's plan.