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Convert a dose in mg into tablets using tablet strength
Written by George Lambroglou, RN • Last reviewed 21 Jun 2026
Convert a prescribed dose in milligrams (mg) to the number of tablets to give, using the tablet strength printed on the packaging.
Formula
Tablets = Prescribed dose (mg) ÷ Tablet strength (mg/tablet)
Worked Example
Order: 500 mg. Tablet strength: 250 mg/tablet. How many tablets?
Tablets = 500 ÷ 250 = 2 tablets
Answer: 2 tablets
Note: Round only per local policy. If the result is not a practical tablet count (e.g., 1.3), consider an alternative formulation or strength.