Concentration-to-Rate
Concentration-to-Rate - a deterministic tool in Sophie Well's Medication & Infusion group.
Open the Concentration-to-Rate → Runs in your browser. No signup, no tracking.
What this is
Convert between drug concentration, weight-based dose, and infusion rate. Given any three of (drug amount in the bag, diluent volume, patient weight, target dose in mcg/kg/min or units/hr, pump rate in mL/hr), Sophie Well solves for the missing fourth and shows the working concentration in mcg/mL alongside the resulting pump rate. The same engine handles continuous infusions (vasopressors, sedatives, heparin) and bolus-then-maintenance presentations.
When to use it
Use this when a code-cart vasopressor bag has a non-standard concentration, when converting a literature dose (mcg/kg/min) into a pump rate at the bag concentration actually hanging at the bedside, or when reconciling a reported pump rate against the prescribed dose during handoff. The math is deterministic; the safety question is whether the unit selection (mcg vs units, /kg vs flat, /min vs /hr) matches the protocol you intend - the tool labels every step so a second reader can audit before the bag goes up.
References
Standard infusion math: rate (mL/hr) = (dose per minute / concentration per mL) * 60. Bag presets per common institutional protocols.
Worked example: Norepi at 0.1 mcg/kg/min, 70 kg, 64 mcg/mL: ~6.56 mL/hr
Sophie Well is a reference and educational tool. Not medical, legal, or financial advice. Does not replace clinician judgment, professional billing review, or legal counsel.