AM
EX
Dosage Calculation Practice_Part 3
1. Convert 65 inches to cm? 2. Convert 176F to C?
𝟐.𝟓 𝒄𝒎
? cm = 𝟔𝟓 𝒊𝒏𝒄𝒉𝒆𝒔 x 𝟏 𝒊𝒏𝒄𝒉 = 162.5 cm TC = (TF - 32)/1.8 = (176 -32)/1.8 = 80C
3. Convert 360 mg to grain (gr)? 4. What elix, CBC, cc, IVPB, susp means?
𝟏 𝒈𝒓
? gr = 𝟑𝟔𝟎 𝒎𝒈 x 𝟔𝟎 𝒎𝒈 = gr 6 ELIXIR, Complete blood count, cubic centimeter, intravenous piggyback, Suspension
5. The patient consumes 15 ounces (oz) of apple juice, 8 ounces of milk, ½ cup of ice, and 5 ounces of
coffee for breakfast. How many ounces and milliliter of fluid did the patient ingest?
𝟑𝟎 𝒎𝒍
? oz = 15 + 8 + (½ (8)) + 5 = 32 oz (b) ? ml = 𝟑𝟐 𝒐𝒛 x 𝟏 𝒐𝒛 = 960 ml
6. An infant weighs 4lb 5 oz. What is the weight of the infant in ounces and kg?
𝟏𝟔 𝒐𝒛 𝟏 𝒍𝒃𝒔 𝟏 𝐤𝐠
? oz = 4 lbs x 𝟏 𝒍𝒃𝒔 = 64 oz; 64 oz + 5 oz = 69 oz (b) ? kg = 69 oz x 𝟏𝟔 𝒐𝒛
x 𝟐.𝟐 𝐥𝐛𝐬
= 1.96 kg
7. A child weighs 55 lbs during a routine weighing by a nurse. What is the weight of this child in
kilograms? (Round answer to the tenth place).
𝟏 𝐤𝐠
? kg = 55 lbs x 𝟐.𝟐 𝐥𝐛𝐬 = 25 kg
8. The healthcare worker ordered Sus-Phrine (epinephrine) 1:100 0.20 ml SQ stat. Available is SusPhrine
1:100 10 ml vial, Calculate the number of ml/dose?
**The order is Sus-Phrine in a dilution of 1 in 100 (1 ml/100ml soln or 1:100), but only 0.20 ml of
this. What’s available is a 10 ml vial containing the medication in this strength (1:100) as order by the
health care provider. Only 0.20 ml (the order) is should be given to the patient from this 10 ml vial
(containing 10 ml of Sus-Phrine in a strength or concentration of 1:100)
Answer: 0.20 ml for the dose
9. A health care provider orders Methotrexate, an antineoplastic drug, 40 mg IM daily for 5 days to treat
inflammatory arthritis. The drug label read 25 mg/ml. How many grains are in one dose?
𝟏 𝐠𝐫
? gr = 40 mg x 𝟔𝟎 𝐦𝐠 = gr 0.67 or 2/3 gr
10. A health care provider orders 60 units of Regular insulin (Humulin R) and 55 units of Humulin N
(NPH). What is the total unit of insulin that must be administered to the patient?
Total U = 60+ 55 = 115 Units
A. Dosage Calculation: Order/On-hand
1. A health care provider orders Digoxin 0.300 mg IM Stat. On hand is Digoxin 500 mcg/ml. How many
mls of Digoxin will the nurse administer?
𝟏𝟎𝟎𝟎 𝒎𝒄𝒈
Order: 0.300 mg x = 300 mcg → → 𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒎𝒍) = 𝑯𝑶 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝟑𝟎𝟎 𝒎𝒄𝒈
𝟓𝟎𝟎 𝒎𝒄𝒈
𝑥 1𝑚𝑙 = 𝟎. 𝟔 𝒎𝒍𝒔
𝟏 𝒎𝒈
𝑶 𝟎. 𝟑𝟎𝟎 𝒎𝒈 𝟏𝟎𝟎𝟎 𝒎𝒄𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒎𝑳) = 𝑥 𝑪𝒐𝒏𝒗. 𝒇𝒂𝒄𝒕𝒐𝒓 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 𝑥 1 𝑚𝑙 = 𝟐 𝒎𝒍𝒔
𝑯 𝟓𝟎𝟎 𝒎𝒄𝒈 𝟏 𝒎𝒈
, AM
EX
2. A health care provider orders Lanoxin (digoxin) 625 mcg IM Stat. The drug label reads (on hand) 2.5
mg/2 ml. How many mg of this cardiac medication (digoxin) will the nurse administer?
𝟏 𝒎𝒈
Order: ? mg = 625 mcg x 𝟏,𝟎𝟎𝟎 𝒎𝒄𝒈 = 0.625 mg
3. The order is Diflucan (fluconazole) 0.2 g po daily to treat a fungal infection. On hand is fluconazole 50
mg tablets. How many tablets will the nurse administer at each dose?
𝟏𝟎𝟎𝟎 𝒎𝒈
Order: ? mg = 0.2 g x = 200 mg
𝟏𝒈
𝑶 𝟐𝟎𝟎 𝒎𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒕𝒂𝒃𝒔) = 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 1 𝑡𝑎𝑏 = 𝟒 𝒕𝒂𝒃𝒔
𝑯 𝟓𝟎 𝒎𝒈
or
𝑶 𝟎. 𝟐 𝒈 𝟏𝟎𝟎𝟎 𝒎𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒕𝒂𝒃𝒔) = 𝑥 𝑪𝒐𝒏𝒗. 𝒇𝒂𝒄𝒕𝒐𝒓 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 𝑥 1 𝑡𝑎𝑏 = 𝟒 𝒕𝒂𝒃𝒔
𝑯 𝟓𝟎 𝒎𝒈 𝟏𝒈
4. A physician ordered Tylenol (acetaminophen) 900 mg PO g4h prn. Label reads: gr 3 per capsule. How
many capsules will the nurse administer per dose?
𝟏 𝐠𝐫
? gr = 900 mg x 𝟔𝟎 𝐦𝐠 = gr 15 or 15 gr →→ 𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒄𝒂𝒑) = 𝑯𝑶 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝟏𝟓 𝒈𝒓
𝟑 𝒈𝒓
𝑥 1𝑐𝑎𝑝 = 5 caps
5. An order for K-Tab (potassium chloride (KCL)) 60 milliequivalents (mEq) po immediately is received.
On hand is 20 mEq per tab. How many tabs would the nurse give?
𝑶 𝟔𝟎 𝒎𝑬𝒒
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒕𝒂𝒃𝒔) = 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 15 𝑚𝑙 = 3 tablets or 3 tabs
𝑯 𝟐𝟎 𝒎𝑬𝒒
6. Ordered: 40 mg Cymbalta (duloxetine HCl) PO daily. Label reads: dose concentration 20 mg per
capsule. How many capsules will the nurse administer per dose?
𝑶 𝟒𝟎 𝒎𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒄𝒂𝒑𝒔) = 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 1 𝑐𝑎𝑝 = 2 capsules or caps
𝑯 𝟐𝟎 𝒎𝒈
B. Dosage Calculation : Using Patient weight
1. A patient weighs 120 kg and has an order for Klonopin (clonazepam) 0.60 mg/kg PO daily in three
divided doses. On hand is: 1 mg tablets. How many tabs will you give daily? Per dose?
𝟎.𝟓𝟎 𝒎𝒈
Order: ? mg = 𝟏𝟐𝟎 𝒌𝒈 𝒙 𝒌𝒈
= 𝟕𝟐 𝒎𝒈
𝑶 𝟕𝟐 𝒎𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒕𝒂𝒃) = 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 1 𝑡𝑎𝑏 = 𝟑𝟔 𝒕𝒂𝒃𝒔/𝒅𝒂𝒚
𝑯 𝟐 𝒎𝒈
in three divided doses → means the daily dose is divided into 3 equal doses for the day
𝟑𝟔 𝒕𝒂𝒃𝒔 𝟏 𝒅𝒂𝒚
𝒔𝒊𝒏𝒈𝒍𝒆 𝒅𝒐𝒔𝒆 = 𝑥 = 𝟏𝟐 𝒕𝒂𝒃𝒔/𝒅𝒐𝒔𝒆
𝟏 𝒅𝒂𝒚 𝟑 𝒕𝒊𝒎𝒆𝒔
2. A patient weighs 165 pounds and has an order for Biaxin (clarithromycin) 5 mg/kg po bid. If the
antibiotic drug strength is 125 mg/5 ml. How many ml will you give per dose? per day?
𝟏 𝒌𝒈 𝟓 𝒎𝒈
Order: ? mg = 𝟏𝟔𝟓 𝒍𝒃𝒔 𝒙 𝟐.𝟐 𝒍𝒃𝒔
𝒙
𝒌𝒈
= 𝟑𝟕𝟓 𝒎𝒈
𝑶 𝟑𝟕𝟓 𝒎𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒎𝒍) = 𝑯 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝟏𝟐𝟓 𝒎𝒈
𝑥 5 𝑚𝑙 = 𝟏𝟓 𝒎𝒍/dose
𝑫𝒐𝒔𝒆 𝟐 𝒕𝒊𝒎𝒆𝒔
= 𝟏𝟓 𝒎𝒍 𝑥 (𝐵𝐼𝐷) = 𝟑𝟎 𝒎𝒍/𝒅𝒂𝒚
𝒅𝒂𝒚 𝟏 𝒅𝒂𝒚
EX
Dosage Calculation Practice_Part 3
1. Convert 65 inches to cm? 2. Convert 176F to C?
𝟐.𝟓 𝒄𝒎
? cm = 𝟔𝟓 𝒊𝒏𝒄𝒉𝒆𝒔 x 𝟏 𝒊𝒏𝒄𝒉 = 162.5 cm TC = (TF - 32)/1.8 = (176 -32)/1.8 = 80C
3. Convert 360 mg to grain (gr)? 4. What elix, CBC, cc, IVPB, susp means?
𝟏 𝒈𝒓
? gr = 𝟑𝟔𝟎 𝒎𝒈 x 𝟔𝟎 𝒎𝒈 = gr 6 ELIXIR, Complete blood count, cubic centimeter, intravenous piggyback, Suspension
5. The patient consumes 15 ounces (oz) of apple juice, 8 ounces of milk, ½ cup of ice, and 5 ounces of
coffee for breakfast. How many ounces and milliliter of fluid did the patient ingest?
𝟑𝟎 𝒎𝒍
? oz = 15 + 8 + (½ (8)) + 5 = 32 oz (b) ? ml = 𝟑𝟐 𝒐𝒛 x 𝟏 𝒐𝒛 = 960 ml
6. An infant weighs 4lb 5 oz. What is the weight of the infant in ounces and kg?
𝟏𝟔 𝒐𝒛 𝟏 𝒍𝒃𝒔 𝟏 𝐤𝐠
? oz = 4 lbs x 𝟏 𝒍𝒃𝒔 = 64 oz; 64 oz + 5 oz = 69 oz (b) ? kg = 69 oz x 𝟏𝟔 𝒐𝒛
x 𝟐.𝟐 𝐥𝐛𝐬
= 1.96 kg
7. A child weighs 55 lbs during a routine weighing by a nurse. What is the weight of this child in
kilograms? (Round answer to the tenth place).
𝟏 𝐤𝐠
? kg = 55 lbs x 𝟐.𝟐 𝐥𝐛𝐬 = 25 kg
8. The healthcare worker ordered Sus-Phrine (epinephrine) 1:100 0.20 ml SQ stat. Available is SusPhrine
1:100 10 ml vial, Calculate the number of ml/dose?
**The order is Sus-Phrine in a dilution of 1 in 100 (1 ml/100ml soln or 1:100), but only 0.20 ml of
this. What’s available is a 10 ml vial containing the medication in this strength (1:100) as order by the
health care provider. Only 0.20 ml (the order) is should be given to the patient from this 10 ml vial
(containing 10 ml of Sus-Phrine in a strength or concentration of 1:100)
Answer: 0.20 ml for the dose
9. A health care provider orders Methotrexate, an antineoplastic drug, 40 mg IM daily for 5 days to treat
inflammatory arthritis. The drug label read 25 mg/ml. How many grains are in one dose?
𝟏 𝐠𝐫
? gr = 40 mg x 𝟔𝟎 𝐦𝐠 = gr 0.67 or 2/3 gr
10. A health care provider orders 60 units of Regular insulin (Humulin R) and 55 units of Humulin N
(NPH). What is the total unit of insulin that must be administered to the patient?
Total U = 60+ 55 = 115 Units
A. Dosage Calculation: Order/On-hand
1. A health care provider orders Digoxin 0.300 mg IM Stat. On hand is Digoxin 500 mcg/ml. How many
mls of Digoxin will the nurse administer?
𝟏𝟎𝟎𝟎 𝒎𝒄𝒈
Order: 0.300 mg x = 300 mcg → → 𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒎𝒍) = 𝑯𝑶 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝟑𝟎𝟎 𝒎𝒄𝒈
𝟓𝟎𝟎 𝒎𝒄𝒈
𝑥 1𝑚𝑙 = 𝟎. 𝟔 𝒎𝒍𝒔
𝟏 𝒎𝒈
𝑶 𝟎. 𝟑𝟎𝟎 𝒎𝒈 𝟏𝟎𝟎𝟎 𝒎𝒄𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒎𝑳) = 𝑥 𝑪𝒐𝒏𝒗. 𝒇𝒂𝒄𝒕𝒐𝒓 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 𝑥 1 𝑚𝑙 = 𝟐 𝒎𝒍𝒔
𝑯 𝟓𝟎𝟎 𝒎𝒄𝒈 𝟏 𝒎𝒈
, AM
EX
2. A health care provider orders Lanoxin (digoxin) 625 mcg IM Stat. The drug label reads (on hand) 2.5
mg/2 ml. How many mg of this cardiac medication (digoxin) will the nurse administer?
𝟏 𝒎𝒈
Order: ? mg = 625 mcg x 𝟏,𝟎𝟎𝟎 𝒎𝒄𝒈 = 0.625 mg
3. The order is Diflucan (fluconazole) 0.2 g po daily to treat a fungal infection. On hand is fluconazole 50
mg tablets. How many tablets will the nurse administer at each dose?
𝟏𝟎𝟎𝟎 𝒎𝒈
Order: ? mg = 0.2 g x = 200 mg
𝟏𝒈
𝑶 𝟐𝟎𝟎 𝒎𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒕𝒂𝒃𝒔) = 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 1 𝑡𝑎𝑏 = 𝟒 𝒕𝒂𝒃𝒔
𝑯 𝟓𝟎 𝒎𝒈
or
𝑶 𝟎. 𝟐 𝒈 𝟏𝟎𝟎𝟎 𝒎𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒕𝒂𝒃𝒔) = 𝑥 𝑪𝒐𝒏𝒗. 𝒇𝒂𝒄𝒕𝒐𝒓 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 𝑥 1 𝑡𝑎𝑏 = 𝟒 𝒕𝒂𝒃𝒔
𝑯 𝟓𝟎 𝒎𝒈 𝟏𝒈
4. A physician ordered Tylenol (acetaminophen) 900 mg PO g4h prn. Label reads: gr 3 per capsule. How
many capsules will the nurse administer per dose?
𝟏 𝐠𝐫
? gr = 900 mg x 𝟔𝟎 𝐦𝐠 = gr 15 or 15 gr →→ 𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒄𝒂𝒑) = 𝑯𝑶 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝟏𝟓 𝒈𝒓
𝟑 𝒈𝒓
𝑥 1𝑐𝑎𝑝 = 5 caps
5. An order for K-Tab (potassium chloride (KCL)) 60 milliequivalents (mEq) po immediately is received.
On hand is 20 mEq per tab. How many tabs would the nurse give?
𝑶 𝟔𝟎 𝒎𝑬𝒒
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒕𝒂𝒃𝒔) = 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 15 𝑚𝑙 = 3 tablets or 3 tabs
𝑯 𝟐𝟎 𝒎𝑬𝒒
6. Ordered: 40 mg Cymbalta (duloxetine HCl) PO daily. Label reads: dose concentration 20 mg per
capsule. How many capsules will the nurse administer per dose?
𝑶 𝟒𝟎 𝒎𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒄𝒂𝒑𝒔) = 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 1 𝑐𝑎𝑝 = 2 capsules or caps
𝑯 𝟐𝟎 𝒎𝒈
B. Dosage Calculation : Using Patient weight
1. A patient weighs 120 kg and has an order for Klonopin (clonazepam) 0.60 mg/kg PO daily in three
divided doses. On hand is: 1 mg tablets. How many tabs will you give daily? Per dose?
𝟎.𝟓𝟎 𝒎𝒈
Order: ? mg = 𝟏𝟐𝟎 𝒌𝒈 𝒙 𝒌𝒈
= 𝟕𝟐 𝒎𝒈
𝑶 𝟕𝟐 𝒎𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒕𝒂𝒃) = 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝑥 1 𝑡𝑎𝑏 = 𝟑𝟔 𝒕𝒂𝒃𝒔/𝒅𝒂𝒚
𝑯 𝟐 𝒎𝒈
in three divided doses → means the daily dose is divided into 3 equal doses for the day
𝟑𝟔 𝒕𝒂𝒃𝒔 𝟏 𝒅𝒂𝒚
𝒔𝒊𝒏𝒈𝒍𝒆 𝒅𝒐𝒔𝒆 = 𝑥 = 𝟏𝟐 𝒕𝒂𝒃𝒔/𝒅𝒐𝒔𝒆
𝟏 𝒅𝒂𝒚 𝟑 𝒕𝒊𝒎𝒆𝒔
2. A patient weighs 165 pounds and has an order for Biaxin (clarithromycin) 5 mg/kg po bid. If the
antibiotic drug strength is 125 mg/5 ml. How many ml will you give per dose? per day?
𝟏 𝒌𝒈 𝟓 𝒎𝒈
Order: ? mg = 𝟏𝟔𝟓 𝒍𝒃𝒔 𝒙 𝟐.𝟐 𝒍𝒃𝒔
𝒙
𝒌𝒈
= 𝟑𝟕𝟓 𝒎𝒈
𝑶 𝟑𝟕𝟓 𝒎𝒈
𝑾𝒂𝒏𝒕𝒆𝒅 𝑸𝒕𝒚 (𝒎𝒍) = 𝑯 𝑥 𝑑𝑒𝑠𝑖𝑟𝑒𝑑 𝑢𝑛𝑖𝑡 (𝑄𝑡𝑦) = 𝟏𝟐𝟓 𝒎𝒈
𝑥 5 𝑚𝑙 = 𝟏𝟓 𝒎𝒍/dose
𝑫𝒐𝒔𝒆 𝟐 𝒕𝒊𝒎𝒆𝒔
= 𝟏𝟓 𝒎𝒍 𝑥 (𝐵𝐼𝐷) = 𝟑𝟎 𝒎𝒍/𝒅𝒂𝒚
𝒅𝒂𝒚 𝟏 𝒅𝒂𝒚
