Estimate local anesthetic maximum dose and volume by agent, concentration, weight, and epinephrine use.
Local anesthetic dosing depends on the drug, the concentration, body weight, and whether epinephrine is being used. This calculator estimates maximum dose and converts that limit into volume for the selected concentration.
It also keeps onset, duration, and toxicity-warning context in view so the page works as a dose worksheet rather than as a stand-alone administration or rescue protocol.
Having the maximum dose and the volume conversion in one place reduces the chance of exceeding a published limit when the calculation needs to be done quickly. The comparison table also makes it easier to see how agents differ in onset, duration, and dose ceiling.
Maximum Dose (mg) = Max mg/kg × weight (kg) × hepatic factor × age factor. Volume (mL) = dose (mg) ÷ concentration (mg/mL). Concentration conversion: X% solution = X × 10 mg/mL.
Result: Max dose = 490 mg, max volume = 49 mL of 1% lidocaine with epinephrine
7 mg/kg × 70 kg = 490 mg. At 1% (10 mg/mL), the worksheet maximum volume is 49 mL.
Maximum dose references are usually published in mg/kg, but most clinicians handle local anesthetics in mL. Converting the selected concentration into mg/mL is the step that makes the worksheet practically useful.
Shorter-acting agents such as lidocaine or chloroprocaine are often chosen for quick procedures, while longer-acting agents such as bupivacaine and ropivacaine are used when longer duration is desired. The page keeps those differences visible without turning the result into a procedural order set.
Published dose ceilings are broad reference values. Injection site, vascular uptake, block type, age, hepatic function, pregnancy, and inadvertent intravascular injection can all matter as much as the raw mg/kg number.
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This worksheet converts the selected concentration into mg/mL, applies the agent-specific maximum-dose reference, and then converts that limit into a volume estimate. It is a planning aid for published dose references, not a toxicity-management protocol.
Epinephrine slows local absorption in many use settings, which is why published maximum-dose references are often higher with epinephrine than without it.
No. Highly vascular sites can absorb anesthetic faster than subcutaneous infiltration sites, so the same dose can behave differently depending on location and technique.
Bupivacaine is generally regarded as the most cardiotoxic of the common amide local anesthetics, so its published maximum dose is lower than lidocaine or prilocaine.
No. Tumescent anesthesia uses very different dilution and absorption assumptions, so the worksheet here is not appropriate for that use case.
No. It is a maximum-dose worksheet only. If systemic toxicity is suspected, the response belongs in a live emergency or toxicology pathway.