What blood pressure and cholesterol numbers mean
Blood pressure is two numbers: the top one is the pressure when your heart beats, the bottom one between beats. A reading under 120 over 80 is generally considered normal, and readings that stay at 130 over 80 or higher are usually called high; your clinician decides what your own readings mean. Cholesterol results list total, LDL, HDL and triglycerides; what counts as good for you depends on your overall risk, so ask your target.
Why it matters: Reading your own results sheet lets you ask better questions and notice trends.
Steps
- Find your last results in your patient portal or ask the clinic for a copy.
- Write down your blood pressure as top number over bottom number, with the date.
- For cholesterol, write down total, LDL, HDL and triglycerides with their units and the date.
- Compare each value with the reference range printed on the report, which is the lab's normal band.
- Ask your clinician what your personal targets are, since they depend on age, history and other risks.
- If you check blood pressure at home, sit quietly for five minutes, feet flat, arm supported at heart height, and take two readings a minute apart.
- Keep a simple log with dates so you and your clinician can see trends rather than single readings.
Stop and call a professional if
- a home reading is 180 over 120 or higher: sit quietly and recheck after five minutes, and if it stays that high call your clinician the same day
- a very high reading comes with chest pain, shortness of breath, back pain, numbness, weakness, vision change or trouble speaking: call your local emergency number, 911 in the US
Questions to ask the professional
- What are my personal targets for blood pressure and LDL?
- How often should I recheck these numbers?
- Is my home cuff accurate? Can I bring it to my next visit to compare?
Common mistakes
- Judging one high reading taken right after rushing or drinking coffee.
- Using a cuff that is too small, which reads falsely high.
- Ignoring a borderline number because it is only a little above the range.
- Treating the lab's reference range as your personal target.
Teach this to someone
A one page sheet for showing a friend, a teenager or a parent: what to say, what to show, and one question to check it landed.
Teach: What blood pressure and cholesterol numbers mean
What to say
Blood pressure is two numbers: the top one is the pressure when your heart beats, the bottom one between beats. A reading under 120 over 80 is generally considered normal, and readings that stay at 130 over 80 or higher are usually called high; your clinician decides what your own readings mean. Cholesterol results list total, LDL, HDL and triglycerides; what counts as good for you depends on your overall risk, so ask your target.
What to show
- Find your last results in your patient portal or ask the clinic for a copy.
- Write down your blood pressure as top number over bottom number, with the date.
- For cholesterol, write down total, LDL, HDL and triglycerides with their units and the date.
- Compare each value with the reference range printed on the report, which is the lab's normal band.
- Ask your clinician what your personal targets are, since they depend on age, history and other risks.
- If you check blood pressure at home, sit quietly for five minutes, feet flat, arm supported at heart height, and take two readings a minute apart.
- Keep a simple log with dates so you and your clinician can see trends rather than single readings.
Where it stops
Stop and call a professional if a home reading is 180 over 120 or higher: sit quietly and recheck after five minutes, and if it stays that high call your clinician the same day.
Check question
What does the top number of a blood pressure reading measure?
Answer: The pressure while the heart beats. The top number is the pressure during the heartbeat; the bottom one is between beats.
Your checklist
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Quick quiz
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Related skills
Sources
- US national heart health guidance on blood pressure categories, 2025. Reviewed September 28, 2026.
- US national cholesterol guidance for adults, 2026. Reviewed September 28, 2026.
Written in our own words from the sources above. It is general information, not advice for your situation; where a professional, your doctor or your lease says something different, follow them.
Last reviewed . First published .