The GRACE score is one of the most rigorously validated tools for estimating mortality after an acute coronary syndrome. It informs whether a patient should receive an early invasive strategy and supports objective triage in chest-pain pathways.
How it works
Eight variables each contribute points from the GRACE 1.0 nomogram, and the points are summed into a total (roughly 0 to 280 for in-hospital mortality):
- Age — points rise steeply with each decade (about 0 under 30 up to roughly 100 at 90+).
- Heart rate — more points as the rate climbs above 70 beats per minute.
- Systolic blood pressure — more points as pressure falls below 120 mmHg.
- Creatinine — more points as renal function worsens.
- Killip class — I, II, III, or IV adds increasing points for heart failure.
- Cardiac arrest at admission — adds a fixed block of points.
- ST-segment deviation — adds points.
- Elevated cardiac markers — adds points.
The total maps to an in-hospital mortality band:
- ≤ 108 — low risk (under 1%).
- 109–140 — intermediate risk (1–3%).
- > 140 — high risk (over 3%): consider an early invasive strategy.
Worked example
Consider a 75-year-old presenting with chest pain. Heart rate is 90 bpm, systolic blood pressure 110 mmHg, creatinine 1.2 mg/dL, Killip class II (mild pulmonary crackles), ST depression on ECG, and an elevated troponin. Each of those variables contributes a block of points: advancing age adds a large increment, low blood pressure adds more, the elevated creatinine contributes further, and the three binary findings (Killip II, ST deviation, raised marker) each pile on additional fixed points. The resulting total places this patient firmly in the high-risk band, prompting consideration of catheterisation within 24 hours.
By contrast, a 45-year-old with a normal heart rate of 68, systolic of 130, a creatinine within normal range, Killip class I, no ST change, and a borderline troponin would accumulate far fewer points and might fall in the low- or intermediate-risk band, supporting a more conservative initial approach.
When to use it
GRACE is best applied in the emergency department and coronary care unit to patients with a confirmed or suspected NSTEMI or unstable angina. It complements the HEART score (which is designed for undifferentiated chest pain triage before the diagnosis is established) and adds objective weight to the clinical conversation about timing of angiography.
What this calculator does and does not do
This tool implements the integer-point GRACE 1.0 algorithm: it sums the published nomogram points for all eight variables and maps the total to the published risk bands. GRACE 2.0 replaces the linear nomogram with non-linear regression functions and a proprietary output table; it is typically delivered through licensed software and is not reproduced here.
The score is a triage aid, not a standalone diagnosis. A high GRACE score supports urgency; it must be interpreted alongside the full clinical picture, local catheterisation lab availability, patient preferences, and contraindications. Always defer to your institution’s ACS guideline pathway.
No data you enter is transmitted or stored — the calculation runs entirely in your browser.