GRACE Score Calculator for ACS Risk & Mortality

What the GRACE Score Calculator estimates

The primary outputs use the full eight-variable GRACE 2.0 record to estimate in-hospital death, one-year death, and one-year death or myocardial infarction after an adult ACS presentation. The same submitted record also produces the historical Classic GRACE 1.0 point total so the two model identities remain visible and auditable. [3, 4, 5]

Eight-input record and calculation method

1. Use age, heart rate, systolic blood pressure, initial creatinine, Killip class, cardiac arrest, cardiac-marker elevation, and ST-segment deviation from one ACS presentation.
2. Normalize creatinine to mg/dL without feeding display rounding back into either model.
3. Apply the published GRACE 2.0 continuous transformations and endpoint-specific probability equations.
4. Separately apply the frozen 2003 Classic GRACE 1.0 categorical point table.

The calculator does not read an ECG, interpret a biomarker, infer Killip class, diagnose ACS, or choose testing or treatment. [1, 8]

What the eight inputs mean

Combine measurements only when they describe the same clinical event and a reasonably consistent time point. Do not mix admissions, hospital days, post-treatment values, or remote self-measurements. Killip class remains a clinical assessment, and cardiac markers and ST deviation require the relevant clinical records. [1, 2, 10]

Implemented endpoints and deliberate omissions

Complete reproducible source specifications were verified for direct in-hospital death, one-year death, and one-year death/MI. The page does not calculate 6-month and 3-year probabilities because a complete independently reproducible coefficient, transformation, and baseline specification for those endpoints was not available in the source material used for this implementation. No endpoint is interpolated from the Classic point total. [3, 4, 5]

Version and endpoint boundaries

GRACE 3.0 is an important newer NSTE-ACS redevelopment, but the 2025 U.S. guideline explicitly lists GRACE 2.0. This page does not reverse-engineer GRACE 3.0 or provide individualized treatment-effect estimates. [6, 7, 8]

Historical Classic GRACE 1.0 point table

These static bands reproduce the 2003 bedside point model. They are retained for historical/reference use from the 1999–2001 registry era and are not converted into the GRACE 2.0 probabilities above. [2]

Creatinine scoring uses the unrounded normalized value. The complete Classic point range is 1–372, and the runtime never highlights a selected risk band.

Killip class and presentation variables

Killip class is a clinician-documented bedside description of heart failure or shock at presentation: class I has no clinical signs, class II may include rales, elevated jugular venous pressure, or S3, class III is acute pulmonary edema, and class IV is cardiogenic shock. This form does not infer a class from blood pressure, symptoms, or another field. Cardiac arrest, cardiac-marker elevation, and ST-segment deviation likewise require the relevant contemporaneous records. [2, 10]

Creatinine normalization and published boundaries

Initial creatinine is normalized to mg/dL by dividing a µmol/L result by 88.4. The exact normalized value is assigned to one of the published bands: <0.4 = 1, 0.4–<0.8 = 4, 0.8–<1.2 = 7, 1.2–<1.6 = 10, 1.6–<2.0 = 13, 2.0–<4.0 = 21, and ≥4.0 = 28 points. This is a score unit operation, not an eGFR, clearance, CKD stage, or treatment threshold. [2]

Current guideline context

The 2025 ACC/AHA guideline identifies GRACE Risk Score 2.0 among validated ACS risk scores and warns that risk scores are not diagnostic tools. In confirmed NSTE-ACS, ESC 2023 retains GRACE >140 as one high-risk feature when considering invasive-strategy timing. Exact numerical equivalence between that guideline landmark and the historical point output shown here was not established, so this page does not apply >140 dynamically or issue an angiography instruction. [8, 9]

Special situations and limits

GRACE is not a general-purpose tool for STEMI reperfusion, cardiogenic shock, cardiac-arrest aftercare, severe renal failure or dialysis, pregnancy, children, non-ACS chest pain, remote self-testing, post-transfer values, recurrent ACS, or post-discharge follow-up. These contexts can require different data, time origins, urgency, and pathways. The page does not choose angiography, PCI, CABG, transfer, admission, monitoring, medication, dose, or any treatment.

Comparison with MAP and shock index

Mean arterial pressure uses systolic and diastolic pressure; shock index is heart rate divided by systolic pressure. Both are different hemodynamic quantities and neither substitutes for the eight-variable GRACE point table. This page does not derive either quantity or combine it with the submitted score.

Mean arterial pressure calculator and shock index calculator answer different questions.

Static score limits

The historical point total is 1–372. It is not itself a GRACE 2.0 probability, a healthy range, a risk category, or a trigger for escalation. The page never applies a dynamic >140 comparison and never adds probability, diagnosis, cause, or treatment language to a submitted result. [2, 9]

Worked point-total audit

For example, age 65 (58), heart rate 80 (9), SBP 120 (34), creatinine 1 mg/dL (7), Killip II (20), cardiac arrest yes (39), elevated markers yes (14), and ST deviation yes (28) sum to 209 points. The worked arithmetic demonstrates the frozen point table only; it is not a mortality percentage, diagnosis, or treatment recommendation. [2]