IV Drip Rate Practice Questions
Unlimited randomly generated gtt/min problems with instant checking, plus ten classic worked examples. Formula: gtt/min = (volume × drop factor) ÷ minutes.
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Worked practice problems
Problem 1. Infuse 1000 mL of NS over 8 hours. Drop factor 15 gtt/mL.
Answer and steps
(1000 × 15) ÷ 480 min = 31.25 → 31 gtt/min
Problem 2. Infuse 500 mL over 4 hours. Drop factor 10 gtt/mL.
Answer and steps
(500 × 10) ÷ 240 = 20.8 → 21 gtt/min
Problem 3. Infuse 250 mL over 2 hours. Drop factor 20 gtt/mL.
Answer and steps
(250 × 20) ÷ 120 = 41.7 → 42 gtt/min
Problem 4. Infuse 1000 mL over 12 hours with microdrip tubing (60 gtt/mL).
Answer and steps
(1000 × 60) ÷ 720 = 83.3 → 83 gtt/min. With microdrip tubing, gtt/min equals mL/h (1000 ÷ 12 = 83).
Problem 5. Infuse 750 mL over 6 hours. Drop factor 15 gtt/mL.
Answer and steps
(750 × 15) ÷ 360 = 31.25 → 31 gtt/min
Problem 6. An antibiotic in 100 mL is to run over 30 minutes. Drop factor 10 gtt/mL.
Answer and steps
(100 × 10) ÷ 30 = 33.3 → 33 gtt/min
Problem 7. Give 50 mL over 20 minutes with microdrip tubing (60 gtt/mL).
Answer and steps
(50 × 60) ÷ 20 = 150 gtt/min
Problem 8. Infuse 1200 mL over 10 hours. Drop factor 20 gtt/mL.
Answer and steps
(1200 × 20) ÷ 600 = 40 gtt/min
Problem 9. Infuse 500 mL over 3 hours. Drop factor 15 gtt/mL.
Answer and steps
(500 × 15) ÷ 180 = 41.7 → 42 gtt/min
Problem 10. Infuse 2 L over 24 hours. Drop factor 10 gtt/mL.
Answer and steps
2 L = 2000 mL. (2000 × 10) ÷ 1440 = 13.9 → 14 gtt/min
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Educational practice only – values are invented for training and are not clinical recommendations. Reviewed 2026-08-23.