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Inpatient Insulin Calculator v4.0 8-Module Clinical Decision Support · MEDiscuss.org
Crossover Method: Each insulin dose is adjusted based on the glucose reading it “owns.” Morning dose → Pre-Lunch GRBS. Afternoon dose → Pre-Dinner GRBS. Night dose → Fasting GRBS. Adjustments are percentage-based with safety floor and ceiling.
💉 Current Doses & GRBS Readings
MorningAfternoonNight
Adjusted Dose Recommendation:
  • Morning: — U
  • Afternoon: — U
  • Night: — U
Learn more: Daily Insulin Titration: The Crossover Method
Starting Insulin: Weight-based initiation with context-specific dose tiers. TDD is split according to the chosen regimen. The calculator adjusts for age, renal function, and concurrent oral antidiabetic drugs.
💊 Patient Details
Starting Insulin Regimen:
Learn more: Initiating Insulin in the Hospitalised Patient
Correction Dose: Patient-specific correction scales replace arbitrary “sliding scales.” The ISF (Insulin Sensitivity Factor) tells you how much 1 unit of insulin will lower the blood glucose.
📈 Correction Scale Generator
Patient-Specific Correction Scale:
Learn more: Insulin Sensitivity Factor and the Correction Dose
⚠ Key Principle: Steroid hyperglycaemia peaks 8–12 hours after dose. Morning Prednisolone → afternoon-evening glucose peaks. Dexamethasone → sustained effect (36–54 h). Insulin distribution must match the steroid’s pharmacokinetic glucose footprint.
💊 Steroid & Patient Details
Steroid-Adjusted Insulin Recommendations:
Learn more: Steroid-Induced Hyperglycaemia: From Prednisolone to Dexamethasone
⚠ Critical: Use the average IV insulin rate from the last 6 stable hours only. Give the first SC dose 1–2 hours BEFORE stopping the IV infusion.
💉 IV Insulin Transition
IV → SC Transition Plan:
Learn more: Transitioning from IV to Subcutaneous Insulin
Renal Dose Adjustment: Reduced insulin clearance in CKD increases hypoglycaemia risk. This calculator applies eGFR-based reduction tiers and provides dialysis-specific guidance.
💉 Renal Parameters
Renal-Adjusted Insulin:
Learn more: Insulin Dosing in Chronic Kidney Disease
⚠ Type 1 DM: NEVER omit basal insulin. Hold prandial doses only. Check ketones if GRBS > 250 mg/dL.
💉 NPO / Perioperative Insulin
MorningAfternoonNight
NPO Insulin Plan:
Learn more: Managing Insulin When the Patient Is NPO
Discharge Planning: Inpatient insulin doses are typically 20–30% higher than outpatient needs due to stress hyperglycaemia, IV fluids, and monitored feeding. The calculator applies a safety reduction for home use.
💉 Inpatient Regimen Details
Discharge Insulin Plan:
Learn more: Discharge Insulin Planning: From Hospital to Home
⚠ Clinical Disclaimer: This calculator is a decision-support tool for trained clinicians. It provides starting-point estimates based on published guidelines and must be interpreted in the context of each patient’s clinical condition, comorbidities, nutritional status, and concurrent medications. The tool can’t see your patients, only you can. It does not replace clinical judgement. All insulin dose changes require bedside verification and individualised assessment. Doses must be rounded to the nearest practical unit. Monitor GRBS as per institutional protocol after every dose change.
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© 2026 Dr. Shashikiran Umakanth · MEDiscuss.org · All rights reserved.
Inpatient Insulin Calculator v4.0 – Clinical decision support for educational purposes. Unauthorised reproduction, redistribution, or modification of this tool or its underlying algorithms is prohibited. For permissions, contact mediscuss.org/contact.
Abbreviations: GRBS = Glucometer Random Blood Sugar · TDD = Total Daily Dose · ISF = Insulin Sensitivity Factor · ICR = Insulin-to-Carb Ratio · RRP = Regular-Regular-Premix · OADs = Oral Antidiabetic Drugs · NPO = Nil Per Os · eGFR = estimated Glomerular Filtration Rate · CKD = Chronic Kidney Disease · DKA = Diabetic Ketoacidosis · NPH = Neutral Protamine Hagedorn · SC = Subcutaneous · IV = Intravenous · BD = Twice daily · PD = Peritoneal Dialysis · HD = Haemodialysis
▶ References & Evidence Base (v4.0)
  1. Umpierrez GE et al. Randomized study of basal-bolus insulin therapy in the inpatient management of patients with type 2 diabetes (RABBIT 2 trial). Diabetes Care 2007;30(9):2181-2186.
  2. Umpierrez GE et al. Basal versus sliding-scale regular insulin in hospitalized patients with hyperglycemia during enteral nutrition therapy (RABBIT 2 Nutrition). Diabetes Care 2009;32(5):751-753.
  3. Riddle MC et al. The treat-to-target trial: randomized addition of glargine or human NPH insulin to oral therapy of type 2 diabetic patients (AT.LANTUS). Diabetes Care 2003;26(11):3080-3086.
  4. Garg R et al. Hyperglycemia and hospital mortality in ICU patients: a systematic review and meta-analysis. Crit Care Med 2013;41(9):2009-2022.
  5. Umpierrez GE et al. Management of hyperglycemia in hospitalized patients in non-critical care setting: Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab 2012;97(1):16-38.
  6. Vellanki P et al. Basal Plus trial: a randomized trial comparing basal plus correction insulin with basal bolus in medical patients. Diabetes Care 2013;36(8):2169-2174.
  7. Davidson PC et al. Analysis of guidelines for basal-bolus insulin dosing: basal insulin, correction factor, and carbohydrate-to-insulin ratio. Endocr Pract 2008;14(9):1095-1101.
  8. Walsh J et al. Guidelines for optimal bolus calculator settings in adults. J Diabetes Sci Technol 2011;5(1):129-135.
  9. Roberts A et al. Management of hyperglycaemia and steroid (glucocorticoid) therapy: a guideline from the Joint British Diabetes Societies (JBDS) for Inpatient Care group. Diabet Med 2018;35(8):1011-1017.
  10. Aberer F et al. Glucocorticoid-related hyperglycemia: epidemiology, pathophysiology, and clinical management. Endocrine 2021;72(1):7-17.
  11. Barker C et al. Pharmacokinetic matching of insulin to steroid-induced hyperglycaemia. Pract Diabetes 2023;40(1):28-34.
  12. Mathioudakis N et al. Steroid hyperglycemia: an underrecognized problem in clinical practice. Endocr Pract 2022;28(2):216-225.
  13. Liu D et al. A practical guide to the monitoring and management of the complications of systemic corticosteroid therapy. Allergy Asthma Clin Immunol 2013;9(1):30.
  14. Jones AR et al. Glycaemic management following antenatal corticosteroids in women with gestational diabetes. Med J Aust 2025;222(3):e1-e6.
  15. Kaushal K et al. Short-term intensive insulin therapy in gestational diabetic women receiving betamethasone for fetal lung maturation. PMC 3968568.
  16. ACOG Committee Opinion No. 713. Antenatal Corticosteroid Therapy for Fetal Maturation. 2017.
  17. Bode BW et al. Intravenous insulin infusion therapy: indications, methods, and transition to subcutaneous insulin therapy. Endocr Pract 2004;10(Suppl 2):71-80.
  18. Umpierrez GE et al. Hyperglycemia: an independent marker of in-hospital mortality in patients with undiagnosed diabetes. J Clin Endocrinol Metab 2002;87(3):978-982.
  19. Baldwin D, Apel J. Management of hyperglycemia in hospitalized patients with renal insufficiency or steroid-induced diabetes. Curr Diab Rep 2013;13(1):114-120.
  20. KDIGO 2024 Clinical Practice Guideline for Diabetes Management in Chronic Kidney Disease. Kidney Int 2024;105(4S):S1-S127.
  21. Iglesias P, Diez JJ. Insulin therapy in renal disease. Diabetes Obes Metab 2008;10(10):811-823.
  22. Joint British Diabetes Societies. Management of adults with diabetes undergoing surgery and elective procedures (JBDS 03). Revised 2016.
  23. Duggan EW et al. Perioperative hyperglycemia management: an update. Anesthesiology 2017;126(3):547-560.
  24. Umpierrez GE et al. Hospital discharge algorithm based on admission HbA1c for the management of patients with type 2 diabetes. Diabetes Care 2014;37(11):2934-2939.
  25. Pasquel FJ et al. Predictive value of admission HbA1c on inpatient glycaemic control and response to insulin therapy. Diabetes Care 2015;38(6):e86-e87.
  26. American Diabetes Association. Standards of Care in Diabetes — 2025. Diabetes Care 2025;48(Suppl 1):S1-S352.
  27. AACE/ACE. Consensus Statement on Inpatient Glycemic Control. Endocr Pract 2009;15(4):353-369.
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