Blood Pressure Rule: 100 Plus Your Age, Minus 10 for Women
Author: Ian C. Langtree - Writer/Editor for Disabled World (DW)
Published: 2010/01/16 - Updated: 2026/05/08
Publication Type: Informative
Category Topic: Hypertension - Related Publications
Contents: Synopsis - Introduction - Main - Insights, Updates
Synopsis: This information examines the long-standing "100 plus your age, minus 10 for women" rule once used to estimate a normal systolic blood pressure and weighs it against the steadily lower targets adopted by modern medicine. The article reviews how blood pressure naturally rises with age, summarizes guidance published in the Journal of the American Medical Association indicating that adults over 60 may safely maintain readings at or below 150/90 mm Hg, and questions whether shifting target numbers reflect clinical evidence or pharmaceutical influence. The piece is useful for seniors, people with disabilities and anyone managing hypertension, as it encourages a more individualized conversation with a physician about treatment thresholds, medication side effects and what a reasonable blood pressure goal looks like at different stages of life - Disabled World (DW).
- Topic Definition: 100 Plus Your Age Blood Pressure Rule
The "100 plus your age, minus 10 for women" rule is a historical clinical rule of thumb, widely used through the early and mid 20th century, that estimated an acceptable systolic blood pressure by adding 100 to a person's age in years and subtracting an additional 10 for female patients. Under this approach a 60 year old man would have an expected systolic reading of about 160 mm Hg and a 60 year old woman about 150 mm Hg, reflecting the observation that arterial pressure tends to rise with age. Contemporary guidelines have largely replaced the formula with fixed targets, though recent evidence, including guidance in the Journal of the American Medical Association, supports a more relaxed systolic goal of 150 mm Hg or below for adults past age 60.
Introduction
Blood Pressure 100 Plus Your Age Rule
Everyone has different blood pressure readings, some are high, some low and most are in the middle. Many doctors have long held the belief that an acceptable systolic reading of blood pressure is 100 plus your age. However, "modern" physicians say normal blood pressure takes no account of age.
A reading of 120mm/80mm is normal regardless, according to Mayo Clinic staff. But early 20th century blood pressure cuff users followed a "100-plus-age" rule of thumb to determine what was normal for age. Early 21st century doctors accepted increased "normal rates" as patients age, but within a much more limited range, according to the Mayo Clinic.
Main Content
An article from 2013 published in the Journal of the American Medical Association now also suggests that blood pressure targets can be eased in older patients.
"The authors of the new guidelines, published in the Journal of the American Medical Assn., emphasized that they were not changing the definition of high blood pressure. Rather, they are recognizing that data from randomized clinical trials do not show that using drugs to nudge down systolic blood pressure from 150 to 140 provides any health benefit. Adults past their 60th birthday should maintain their blood pressure at or below 150/90 mm/Hg, according to the new guidelines. If patients are above that target, they should get medication from their doctors, the guidelines state.".
Systolic Blood Pressure of 150 Acceptable for Seniors: Review in Drugs and Aging finds that for adults over 60, keeping systolic blood pressure at or below 150 is adequate, with no clear gain from tighter control.
So Just What is High Blood Pressure?
Despite accepting the 100 plus your age blood pressure reading in the past, today's medical textbooks are arguing over exact values and new blood pressure standards come out every few years placing the desirable blood pressure target values ever lower.
Is medicine fueling this war or might it just be the multi-billion dollar pharmaceutical industry?
To lower blood pressure readings just 5 points on the blood pressure scale can mean billions of dollars. Among the top ten drugs prescribed in the U.S, blood pressure (hypertension) medications ensnare millions into the prescription drug trap.
A former NASA astronaut and family doctor, says the 100+ age guideline for "normal" blood pressure was around for decades. He also wonders if modern views on what is normal blood pressure arise from drug company involvement.
"In the 1970s, the target limit for initiating drug treatment was 160/95. This then became 140/90, then 120/90, and recently, 115/75, with a large number of organizations listed as in agreement," he says.
Blood pressures tend to rise naturally with age in both men and women so that a 130 systolic blood pressure of a 30-year old (roughly 100 plus the age) becomes 150 in a fifty year old and 160 in a 60 year old with male blood pressure readings exceeding female by around 10 mm Hg.
- The systolic pressure is the pressure peak with each beat of the heart (systole).
- The diastolic pressure is the basal pressure that is in the blood vessels during relaxation of the heart (diastole).
In a dramatic reversal in policy, on May 4, 2000, an expert committee announced that systolic pressure is the most accurate blood pressure measurement for older adults. The new guidelines hold true for all those with hypertension who are over age 40 - a group that makes up the majority of 50 million Americans with the disease.
Since blood pressure elevation is associated with increased all-cause death rates, lowering of blood pressures by whatever means can only be good for humanity - can't it?
Well, the pharmaceutical industry loves it - this focus makes them billions of dollars.
The medical community loves it - it's good for business and seems ethically correct, and the public likes it.
So began the worldwide focus on lowering blood pressure, the evolution of thousands of drugs designed to lower blood pressure, and of course, the beginning of a still growing multi-billion dollar business.
High blood pressure, as defined by the drug industry and medical doctors, is not an instant death sentence.
The goal of maintaining a blood pressure at or near 140/80 (now 115/75) is based on drug company hype, not science. These numbers are designed to sell drugs by converting healthy people into patients.
Prior to this ideal numbers for normal healthy blood pressure were based on the Framingham Heart Study, where hypertension was a reading of systolic 120 and diastolic 80 - and anything up to systolic 140 was considered acceptable or high/normal.
If high blood pressure were dangerous, then lowering it with hypertension drugs would surely result in an increase in lifespan? Yet, clinical trials involving hypertension medication show NO increased lifespan among users when compared to non-users.
Check your blood pressure reading according to age, and compare your numbers with the LATEST blood pressure recommendations.
Insights, Analysis, and Developments
Editorial Note: Blood pressure targets have moved several times over the past half century, and reasonable clinicians still disagree on the right number for an otherwise healthy older adult - what has not changed is that a single reading is a snapshot rather than a verdict, and decisions about starting, stopping or adjusting medication are best made with a trusted prescriber who can weigh age, comorbidities, fall risk and overall quality of life alongside the figures on the cuff - Disabled World (DW).
Author Credentials: Ian is the founder and Editor-in-Chief of Disabled World, a leading resource for news and information on disability issues. With a global perspective shaped by years of travel and lived experience, Ian is a committed proponent of the Social Model of Disability-a transformative framework developed by disabled activists in the 1970s that emphasizes dismantling societal barriers rather than focusing solely on individual impairments. His work reflects a deep commitment to disability rights, accessibility, and social inclusion. To learn more about Ian's background, expertise, and accomplishments, visit his full biography.