Your health benchmarked against real clinical data

The American Heart Association defines normal blood pressure as below 120/80 mmHg. Elevated is 120 to 129 systolic with diastolic under 80. Stage 1 hypertension is 130 to 139 systolic or 80 to 89 diastolic, and stage 2 is anything above 140/90. The CDC reports that nearly half of US adults, around 122 million people, meet the threshold for high blood pressure, which makes the clinical definition of normal quite different from the statistical average. Roughly only 1 in 4 adults with hypertension have it under control. White-coat effect can add 10 to 20 mmHg to a reading, so home monitoring across multiple sessions tends to be more accurate than a single clinic measurement. Cuff fit, posture, recent caffeine and time of day all shift the number meaningfully. The blood pressure calculator takes your reading and shows where it sits across the AHA categories, and the resting heart rate calculator covers the companion cardiovascular metric.

The American College of Obstetricians and Gynecologists defines a normal cycle as 21 to 35 days long, with bleeding lasting 2 to 7 days and a typical blood loss of 30 to 40 ml across the period. About 14 to 25 percent of women have irregular cycles in any given year, which is far higher than most people assume, and cycle length naturally varies by 2 to 5 days month to month even in healthy menstruators. Cycles tend to shorten slightly through the late 30s and become more variable in perimenopause. Heavy menstrual bleeding (more than 80 ml per cycle, or soaking through a pad or tampon every hour) affects roughly 1 in 5 women and is medically significant, not just inconvenient. Painful periods affect 50 to 90 percent of menstruators at some point. The is my period normal tool scores cycle length, flow, pain and regularity against clinical norms, and the endometriosis symptom checker covers patterns associated with the 7 to 9 year median diagnostic delay.

IBS is diagnosed using the Rome IV criteria: recurrent abdominal pain, on average at least one day per week for the last three months, associated with two or more of the following: pain related to defecation, change in stool frequency, or change in stool form. The International Foundation for Gastrointestinal Disorders estimates 10 to 15 percent of the US adult population meets these criteria, but only about 30 percent of those people seek medical care for it. Women are roughly twice as likely as men to be diagnosed. IBS is a syndrome of patterns, not a structural disease, which is why imaging and bloods often come back normal even when symptoms are severe. Red flag symptoms that point away from IBS and toward more urgent investigation include rectal bleeding, unexplained weight loss, nocturnal symptoms that wake you, and onset after age 50. The IBS symptom checker walks through Rome IV pattern matching, and bloating and bowel frequency tools cover the common adjacent symptoms.

The American Heart Association defines a normal adult resting heart rate as 60 to 100 beats per minute, but this range is dated and clinically conservative. Aerobically fit adults typically sit between 50 and 70 bpm, and well-trained endurance athletes routinely measure 40 to 50 bpm. The Copenhagen Male Study found that resting heart rate is an independent predictor of all-cause mortality, with each additional 10 bpm above the median associated with a roughly 16 percent increase in cardiovascular risk over follow-up. Time of day matters: heart rate is typically lowest in deep sleep and highest mid-morning. Caffeine, dehydration, recent food, anxiety and ambient temperature all push the number up. Wearable trackers measure from the wrist optically and tend to overestimate resting heart rate by 2 to 5 bpm compared with a chest strap or ECG. The resting heart rate calculator shows your reading against age and fitness benchmarks, and the biological age calculator incorporates resting HR into a wider physiological estimate.

Vitamin D deficiency is one of the most common nutritional deficiencies globally, with the NIH reporting that around 35 percent of US adults meet the threshold for deficiency (serum 25(OH)D below 20 ng/mL) and a further 41 percent are insufficient (20 to 30 ng/mL). Common signs include persistent fatigue, bone or back pain, muscle weakness or cramping, low mood, hair shedding and slower wound healing. Many cases are entirely asymptomatic, which is why screening blood tests are the only reliable way to know. Risk increases with darker skin pigmentation, higher latitude (above roughly 35°N), limited sun exposure, age over 65, obesity, and conditions affecting fat absorption. The recommended daily intake from the IOM is 600 to 800 IU, but treatment doses for diagnosed deficiency are typically 1,000 to 4,000 IU daily for several months. The vitamin deficiency quiz covers the six most common deficiencies including D, B12, iron and magnesium, and the fatigue severity quiz helps separate nutritional fatigue from other causes.

Metabolic health is conventionally defined by five markers: waist circumference, blood pressure, fasting glucose, triglycerides, and HDL cholesterol. To be considered metabolically healthy, all five must sit within optimal ranges without medication. Araújo and colleagues, publishing in Metabolic Syndrome and Related Disorders in 2019, found that only 12.2 percent of US adults met all five criteria, meaning 88 percent of American adults are metabolically unhealthy by this definition. The single most useful proxy at home is waist circumference: greater than 40 inches (102 cm) for men or 35 inches (88 cm) for women is associated with substantially elevated metabolic risk. Fasting glucose above 100 mg/dL, triglycerides above 150 mg/dL, or blood pressure above 130/85 each independently raise the risk. Insulin resistance often precedes any visible diagnostic threshold by years. The metabolic health quiz uses waist circumference and lifestyle inputs to estimate insulin resistance risk, and the visceral fat calculator covers the most metabolically active fat depot.

Persistent fatigue is one of the most commonly reported symptoms in primary care, and it is rarely traceable to a single cause. The CDC reports that around 13.5 percent of US adults feel very tired or exhausted most days, with rates higher in women (15.7 percent) than in men (11.1 percent). The Fatigue Severity Scale, used in clinical research, considers a score of 4 or higher (out of 7) as clinically significant fatigue. Sleep debt is the most common driver: the average US adult sleeps 6.8 hours per night, while the National Sleep Foundation recommends 7 to 9 hours, meaning most people accumulate a chronic sleep deficit they have stopped noticing. Iron deficiency, vitamin D deficiency, B12 deficiency, hypothyroidism, perimenopause, depression and undiagnosed sleep apnea are the most common medical contributors. If fatigue persists despite adequate sleep for two or more weeks, it warrants investigation. The fatigue severity quiz uses the validated FSS-9 scale, the sleep debt calculator quantifies how far behind you are, and the perimenopause quiz covers fatigue patterns specific to hormonal change.

At-home health calculators sit between two extremes: they are not diagnostic tools, but they are also not horoscopes. Their accuracy depends on the input data quality, the underlying clinical reference, and what they claim to measure. Tools using validated clinical scales (the FSS-9 fatigue scale, the GAD-7 anxiety scale, the Rome IV IBS criteria, the AAQ-10 autism screener) have published sensitivity and specificity values, often above 80 percent for screening purposes. Population-percentile tools (where does my BP, weight or sleep sit relative to age and sex peers?) are only as accurate as the source dataset, and Find The Norm cites the specific study or agency on every page. What these tools cannot do is replace clinical examination, blood work, imaging or specialist judgement. They are most useful when they prompt one of two outcomes: reassurance that what you are experiencing is statistically normal, or evidence that it is not, which is then taken to a clinician. Every Find The Norm health page includes a medical disclaimer and signposts to professional care when symptoms cross the relevant clinical threshold.