Home /
Knowledge base /
Calculator
Epigenetic aging · calculator
Stress-aging index calculator
Stress and lifestyle shift the pace of biological aging. Enter your PSS-10 score, sleep quality, activity, and diet — and get a personal risk profile for accelerated aging.
How stress accelerates aging
Chronic stress sets off three interlocking mechanisms, and each one speeds up epigenetic aging. The MIDUS study showed they can be measured through DNA methylation (GrimAge, DunedinPACE), with sleep, activity, and diet acting as the key mediators. The same stress takes a toll on the brain too — more on that in our piece on cognitive aging.
medication
The cortisol pathway
Chronically high cortisol suppresses immunity, impairs DNA repair, and speeds up the shortening of telomeres.
local_fire_department
The inflammatory pathway
Stress raises cytokines (IL-6, TNF-α). Chronic inflammation disrupts epigenetic regulation and builds up allostatic load.
routine
The behavioral pathway
Stress disrupts sleep, cuts activity, and worsens diet. Behavior turned out to be the main mediator linking stress to GrimAge.
psychology
arrow_forward
Stress
PSS-10 ↑
bedtime
arrow_forward
Sleep disruption
main mediator
restaurant
arrow_forward
Worse diet
fewer antioxidants
weekend
arrow_forward
Inactivity
less movement
hourglass_bottom
GrimAge ↑
accelerated aging
quiz
Haven't taken the PSS-10 yet? The calculator needs your test score (0–40). Take the
stress level test — it's 3–5 minutes — and come back with your result.
Stress-aging index calculator
Fill in all 4 blocks — your result appears below. Weighted by the coefficients of the MIDUS model (GrimAge acceleration, R²=0.43).
PSS-10 zones
0–13 Low14–26 Moderate27–40 High
—
Each factor's contribution
Personal recommendations
info
This calculator shows a trend and a risk profile, not your exact biological age and not a diagnosis. Calculated from the coefficients in Goering et al. (2026, Brain Behav Immun Health). If your risk is high, consult a preventive-medicine specialist.
The epigenetics of stress: what the study measures
Researchers at Georgetown University used three generations of epigenetic clocks:
GrimAge
The most accurate predictor of mortality. R²=0.43 — 43% of the variation is explained by stress and lifestyle. Stressors acted both through behavior and directly (cortisol, blood pressure).
DunedinPACE
Measures the pace of aging: a value >1.0 means aging faster than normal. Moderately explained by stress (R²=0.31) and sensitive to short-term change.
PhenoAge
Phenotypic age from blood biochemistry. Less explained by stress (R²=0.07) — blood chemistry is less sensitive to stress than DNA methylation.
Key takeaway
Stressful life events affected GrimAge 2–3× more strongly than perceived stress. Sleep is the strongest behavioral mediator.
