What is the difference between macro and micro drip sets?

Macro drip sets deliver 10, 15, or 20 drops per mL and are used for larger patients or faster fluid rates. Micro drip sets deliver 60 drops per mL and allow finer control for small patients or slow rates.

When should I use a fluid pump instead of manual drip calculation?

Use a fluid pump for precise rates in small patients, critical care settings, or when delivering medications that require exact dosing. Pumps reduce the risk of accidental fluid overload.

How do I calculate drip rate manually?

Drip rate (drops/min) equals total volume in mL divided by total time in minutes, multiplied by the drip set factor (drops per mL).

Arithmetic support

IV drip rate calculator

Calculate transparent gravity-set drops per minute or pump flow from a selected labeled set, measured volume, and time. This arithmetic result does not select a fluid, volume, therapeutic rate, or patient plan.

Safety checks

Arithmetic only; no fluid or patient plan is selected.
Confirm the physical set's labeled drop factor or the pump setting before use.
This calculator does not retain patient records or results.

Basis and limits

Gravity set: the selected physical delivery factor is 10, 15, 20, or 60 gtt/mL.
Pump mode: reports mL/hr only; it does not calculate drops per minute.
Flow formula: volume (mL) ÷ time (hr) = mL/hr.
Drip formula: volume (mL) ÷ time (min) × labeled gtt/mL = gtt/min.
Scope: this tool provides arithmetic only. It does not choose a fluid type, volume, therapeutic rate, or patient plan.

Formula

Drops/min: (volume mL ÷ time in min) × drops per mL

mL/hr: volume mL ÷ time in hours

Last reviewed: May 2026

Scope: arithmetic support only. Verify the selected delivery set and any patient-specific fluid decision against current references and clinical judgment.

IV drip rate calculator

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