Home›Calculators›Health›Diabetic Ketoacidosis Calculator

Diabetic Ketoacidosis Calculator

Health

Estimate diabetic ketoacidosis (DKA) severity from blood glucose, pH, bicarbonate, and anion gap using standard ADA classification. Educational tool only.

Blood Glucose
mg/dL
70800
Arterial pH
6.87.5
Serum Bicarbonate (HCO3-)
mEq/L
030
Serum Sodium (Na+)
mEq/L
110160
Serum Chloride (Cl-)
mEq/L
80120
Mental Status

DKA Severity

—

Anion Gap

0 mEq/L

Corrected Sodium

0 mEq/L

—

Based on ADA hyperglycemic-crises classification (glucose, pH, bicarbonate, and mental status).

For education only — not a diagnosis. DKA is a medical emergency. This tool does not replace clinical evaluation; seek immediate medical care for suspected DKA.

What is a DKA Severity?

A Diabetic Ketoacidosis (DKA) Calculator organizes the key lab values used in the ADA hyperglycemic-crises classification — blood glucose, arterial pH, serum bicarbonate, serum sodium, serum chloride, and mental status — into a single severity estimate. DKA is a serious complication of diabetes where insufficient insulin forces the body to burn fat for fuel, producing ketones that acidify the blood; left untreated, it can progress rapidly and become life-threatening.

This calculator computes two supporting values, the anion gap and corrected sodium, alongside a mild, moderate, or severe classification based on standard clinical criteria. It complements longer-term glucose tools like the A1c Calculator and the Estimated Average Glucose Calculator, which track blood sugar control over months rather than an acute crisis.

How to use this DKA Severity calculator

  1. Enter the Blood Glucose reading in mg/dL from the relevant lab panel.
  2. Enter the Arterial pH value from the arterial blood gas result.
  3. Enter the Serum Bicarbonate (HCO3-) value in mEq/L.
  4. Enter Serum Sodium (Na+) and Serum Chloride (Cl-) in mEq/L to allow the anion gap and corrected sodium to be calculated.
  5. Select the Mental Status — Alert, Drowsy, or Stupor/Coma — since this can escalate borderline severity classifications.
  6. Review the DKA Severity result along with the anion gap and corrected sodium, and treat any concerning result as a reason to seek emergency medical evaluation.

Formula & Methodology

Anion Gap = Na⁺ − (Cl⁻ + HCO3⁻)

Corrected Sodium = Na⁺ + 1.6 × [(Glucose − 100) / 100]

Severity is classified per the ADA/Kitabchi hyperglycemic-crises consensus framework (Diabetes Care, 2009):

- Mild DKA: glucose > 250 mg/dL, pH 7.25-7.30, HCO3 15-18 mEq/L, alert
- Moderate DKA: glucose > 250 mg/dL, pH 7.00-7.24, HCO3 10-14 mEq/L, alert or drowsy
- Severe DKA: glucose > 250 mg/dL, pH below 7.00, HCO3 below 10 mEq/L, or stupor/coma

Worked example: glucose 400 mg/dL, pH 7.15, HCO3 10 mEq/L, Na⁺ 133 mEq/L, Cl⁻ 98 mEq/L, alert:
- Anion gap = 133 − (98 + 10) = 25 mEq/L
- Corrected sodium = 133 + 1.6 × [(400 − 100) / 100] = 137.8 mEq/L
- pH 7.15 and HCO3 10 fall in the moderate range → result: Moderate DKA

Frequently Asked Questions

Diabetic ketoacidosis is a serious, potentially life-threatening complication of diabetes in which a severe lack of insulin causes the body to break down fat for fuel, producing acidic byproducts called ketones. It is marked by high blood glucose, a low blood pH, low bicarbonate, and an elevated anion gap, and it requires urgent medical treatment.
The calculator uses blood glucose, arterial pH, serum bicarbonate, serum sodium, serum chloride, and mental status — the same core values clinicians use for the ADA hyperglycemic-crises severity classification. From these it derives the anion gap, corrected sodium, and a mild, moderate, or severe DKA category.
Under the ADA consensus classification, mild DKA typically shows a pH of 7.25-7.30 and bicarbonate of 15-18 mEq/L, moderate DKA shows pH 7.00-7.24 and bicarbonate 10-14 mEq/L, and severe DKA shows a pH below 7.00 and bicarbonate below 10 mEq/L. Mental status (alert, drowsy, or stupor/coma) is used to escalate borderline classifications.
The anion gap is calculated as serum sodium minus the sum of chloride and bicarbonate, and it reflects unmeasured acids in the blood such as ketones. An elevated anion gap alongside high glucose and low bicarbonate is a hallmark of DKA and helps distinguish it from other causes of hyperglycemia.
High blood glucose pulls water out of cells and dilutes measured sodium, so the corrected sodium formula adjusts the reading to reflect what sodium would be once glucose returns to normal. This corrected value helps clinicians assess true hydration and sodium status during treatment.
DKA is generally diagnosed with blood glucose above 250 mg/dL alongside metabolic acidosis and ketosis, though a rarer form called euglycemic DKA can occur at lower glucose levels, particularly with certain diabetes medications. This calculator flags glucose below 250 mg/dL as not meeting the typical diagnostic threshold.
No. This tool is for informational and educational purposes only and cannot diagnose DKA or replace clinical evaluation, arterial blood gas testing, or emergency care. Anyone with symptoms of DKA — such as rapid breathing, confusion, nausea, or fruity-smelling breath — should seek immediate medical attention.
Common triggers include missed or insufficient insulin doses, infection or illness, undiagnosed type 1 diabetes, certain medications, and significant physical or emotional stress. Identifying and treating the underlying trigger is a key part of DKA management alongside insulin and fluid replacement.
DKA reflects an acute crisis, while A1c and estimated average glucose reflect longer-term blood sugar control over roughly two to three months. Someone can experience DKA even with a moderate A1c if an acute trigger like illness or a missed insulin dose occurs — see the [A1c Calculator](/a1c-calculator/) for a longer-term view.
Yes, although DKA is more common in type 1 diabetes, it can occur in type 2 diabetes during severe illness, infection, or significant insulin deficiency, and a related condition called hyperosmolar hyperglycemic state is more typical in type 2 diabetes. Both are medical emergencies requiring prompt treatment.
Treat any result suggesting DKA as a signal to seek emergency medical care immediately rather than attempting self-treatment. This calculator only organizes lab values into an educational severity framework — it cannot replace the full clinical assessment a hospital or emergency department will perform.
Also known as
DKA calculatordiabetic ketoacidosis severityanion gap calculatorDKA severity classificationketoacidosis assessment tool