What does GIR measure?

GIR measures glucose delivery in milligrams per kilogram of body weight per minute.

What formula does the calculator use?

It uses GIR = (mL/h × dextrose%) / (weight in kg × 6).

Can I enter a newborn's weight in grams?

Yes. Select g (newborn), and the calculator converts the weight to kilograms.

Which dextrose concentrations are supported?

The calculator supports D5, D10, D12.5, D25, and D50.

What GIR range is commonly used for term neonates?

The stated target range for term neonates is 4–6 mg/kg/min. Clinical interpretation requires professional judgment and monitoring.

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Glucose Infusion Rate (GIR, mg/kg/min)

Calculate the glucose infusion rate GIR (mg/kg/min) for neonatal/pediatric IV nutrition. GIR = (mL/h × Dextrose%) / (Weight kg × 6). Supports D5–D50. Targets: 4–6 for term neonates; < 4 hypoglycemia risk; > 12 hyperglycemia risk. Weight in kg or g. Derived from Adamkin 2009, ASPEN 2013, MDCalc, and Singhal 2018. Not medical advice.

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2 examples

Neonate 3 kg, D10, 18 mL/h → GIR = 10.0 mg/kg/min

GIR = (18 × 10) / (3 × 6) = 180 / 18 = 10.0 mg/kg/min. Higher GIR appropriate for a neonate with elevated energy demands. Monitor blood glucose.

{"result":"GIR = 10 mg/kg/min (Higher GIR (6–10 mg/kg/min)). GIR = (mL/h × Dextrose%) / (kg × 6).","metadata":{"input":{"weight":3,"weightUnit":"kg","dextrosePercent":"10","infusionRate":18},"result":{"girMgPerKgPerMin":10,"girMgPerKgPerDay":14400,"dextrosePercent":10,"glucoseMgPerMinAbsolute":30,"category":"Higher GIR (6–10 mg/kg/min)","method":"GIR = (mL/h × Dextrose%) / (Weight kg × 6)","model":"Adamkin 2009; ASPEN 2013; MDCalc; Singhal 2018. Not medical advice."}}}

Older child 20 kg, D5, 100 mL/h → GIR = 4.2 mg/kg/min

GIR = (100 × 5) / (20 × 6) = 500 / 120 = 4.17 ≈ 4.2 mg/kg/min. Within the 4–6 target for maintenance glucose delivery.

{"result":"GIR = 4.2 mg/kg/min (Target GIR (4–6 mg/kg/min)). GIR = (mL/h × Dextrose%) / (kg × 6).","metadata":{"input":{"weight":20,"weightUnit":"kg","dextrosePercent":"5","infusionRate":100},"result":{"girMgPerKgPerMin":4.2,"girMgPerKgPerDay":6000,"dextrosePercent":5,"glucoseMgPerMinAbsolute":83.3,"category":"Target GIR (4–6 mg/kg/min)","method":"GIR = (mL/h × Dextrose%) / (Weight kg × 6)","model":"Adamkin 2009; ASPEN 2013; MDCalc; Singhal 2018. Not medical advice."}}}

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5 options

SettingsAdjust formats, ranges, numbers, and modes.5

WeightnumberRequiredPatient body weight, in the unit selected below.Weight UnitselectRequiredDextrose ConcentrationselectRequiredInfusion Rate (mL/h)numberRequiredDextrose infusion rate in mL/h.Decimal PlacesnumberOptional

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Glucose Infusion Rate (GIR, mg/kg/min)

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Examples

1. Neonate receiving D10

2. Older child receiving D5

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