Fluid drachms/drams (imperial) to drops (US)

This free conversion calculator will convert fluid drachms/drams (imperial) to drops (us), i.e. fl dr (imp) to gtt. Correct conversion between different measurement scales.

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The formula is $$$V_{\text{gtt}} = \frac{6819135000}{157725491} V_{\text{fl dr (imp)}}$$$, where $$$V_{\text{fl dr (imp)}} = 15$$$.

Therefore, $$$V_{\text{gtt}} = \frac{102287025000}{157725491}$$$.

Answer: $$$15 \text{fl dr (imp)} = \frac{102287025000}{157725491} \text{gtt}\approx 648.512959772622 \text{gtt}.$$$