Infusion of 1000 mL over 6 hours. What is the rate in mL/hour?

Infusion of 1000 mL over 6 hours. What is the rate in mL/hour?

• A. 160 mL/hr
• B. 167 mL/hr
• C. 180 mL/hr
• D. 200 mL/hr

Answer: (B)

The rate is found by dividing the total volume by the time: 1000 mL ÷ 6 hours = 166.666... mL/hour. In practice, IV rates are given in whole mL per hour, so we round to the nearest whole number, which is 167 mL/hour. If you needed exact precision, it would be about 166.7 mL/hour, but pumps typically use whole numbers, making 167 mL/hour the standard choice.

The rate is found by dividing the total volume by the time: 1000 mL ÷ 6 hours = 166.666... mL/hour. In practice, IV rates are given in whole mL per hour, so we round to the nearest whole number, which is 167 mL/hour. If you needed exact precision, it would be about 166.7 mL/hour, but pumps typically use whole numbers, making 167 mL/hour the standard choice.