TinyDrip 🧪
NICU · Fluid & Electrolyte Calculator
🌙
☀️
⚡ Starter
D10 + ½NS @ 120
D10W @ 80
D5 + ¼NS @ 120
✕
👶 Patient
Weight
850
g
mL/kg/d
mL/day
mL/hr
Fluid Rate
120 mL/kg/d
80
100
120
140
160
Total daily volume
102 mL/day
= — mL/kg/d at current weight
Run rate
4.3 mL/hr
= — mL/kg/d at current weight
Bag Volume
250 mL
500 mL
1000 mL
30 mL
💊 Drip Order
—
mg/kg/min
GIR
—
mL/hr
Run rate
—
mL/day
Daily vol
Central line? → Heparin
0.5 U/mL final concentration
—
mL to add
📋 Mix Sheet
▶
⚗️ Electrolyte Delivery
· tap column header for math
🍬
Dextrose
Dex %
Target GIR
Dex %
None
D5
D10
D12.5
D15
D20
GIR Target
mg/kg/min
6
7
8
10
12
10
%
GIR Fine Adjust
8.0
Result
GIR
—
mg/kg/min
Dex% Required
Need
—
% at
—
mL/kg/d
🧂
Sodium
1
2
3
4
via:
¼NS
½NS
NS
3.0
mEq/kg/d
🍌
Potassium
0
1
2
3
4
2.0
mEq/kg/d
KCl
K-Acetate
🦴
Calcium
0
100
200
300
200
mg/kg/d
Ca-Gluconate 10% · 100 mg/mL
📐 The Math Behind It
▶ expand
ONE FORMULA
dose × weight = total/day
total ÷ conc = mL/day
× (bag÷daily) = mL to add
Na is in the base fluid:
conc × bagVol = mEq in bag
nothing to draw up
GIR:
Dex% × rate ÷ 144 = mg/kg/min
Stoich: A/B = C/D
solve C = A×D/B
same calc every electrolyte
LIVE EXAMPLE
Patient:
850g · 120 mL/kg/d · 250mL bag
Potassium:
2 × 0.85 = 1.70 mEq/day
÷ 2 mEq/mL = 0.85 mL/day
× 250÷102 = 2.08 mL → add ✓
Calcium:
200 × 0.85 = 170 mg/day
÷ 100 mg/mL = 1.70 mL/day
× 250÷102 = 4.17 mL → add ✓
Sodium (base fluid):
½NS = 0.077 mEq/mL × 250mL
= 19.25 mEq Na in bag
GIR:
10% × 120 ÷ 144 = 8.3 mg/kg/min
D-W base
+
KCl
Ca
=
Final ✅
GIR —
Na — mEq
K —
Ca —
Run — mL/hr
Scale factor:
bag ÷ dailyVol = fraction
mL/day × fraction = add