Lidocaine Dose & Maximum Volume Calculator

Calculate the safe maximum lidocaine dose and injectable volume for any patient.

Enter the patient's weight, lidocaine concentration, and whether epinephrine is used. Instantly get the safe maximum dose (mg) and maximum injectable volume (ml). Always consult a healthcare professional before administration.

Example Calculations

See how to calculate lidocaine dose and volume for different scenarios.

Adult, Plain Lidocaine, 1%

adult-plain

70 kg adult, 1% lidocaine (10 mg/ml), no epinephrine.

Weight: 70 kg

Concentration: 1 %

Epinephrine: No

Region: skin

Adult, Lidocaine with Epinephrine, 2%

adult-epi

80 kg adult, 2% lidocaine (20 mg/ml), with epinephrine.

Weight: 80 kg

Concentration: 2 %

Epinephrine: Yes

Region: nerve

Child, Plain Lidocaine, 1%

child-plain

20 kg child, 1% lidocaine (10 mg/ml), no epinephrine.

Weight: 20 kg

Concentration: 1 %

Epinephrine: No

Region: dental

Adult, 154 lbs, 20 mg/ml, with Epinephrine

lbs-mgml

154 lbs adult, 20 mg/ml lidocaine, with epinephrine.

Weight: 154 lbs

Concentration: 20 mgml

Epinephrine: Yes

Region: skin

Other Titles
Understanding Lidocaine Dose & Maximum Volume Calculator: A Comprehensive Guide
Learn how to safely calculate and administer lidocaine for all ages and scenarios.

What is the Lidocaine Dose & Maximum Volume Calculator?

  • Purpose of the Calculator
  • Who Should Use It?
  • Why Accurate Dosage Matters
The Lidocaine Dose & Maximum Volume Calculator is a tool designed to help healthcare professionals, students, and patients determine the safe maximum dose and injectable volume of lidocaine for local anesthesia. It considers patient weight, lidocaine concentration, and the presence of epinephrine.
Safe and Effective Dosing

Practical Scenarios

  • A nurse calculates the safe lidocaine dose for a 70 kg adult.
  • A dentist checks the maximum injectable volume for a child.

Step-by-Step Guide to Using the Lidocaine Dose Calculator

  • Entering Patient Information
  • Selecting Concentration and Units
  • Reviewing Results and Warnings
Start by entering the patient's weight and selecting the appropriate unit (kg or lbs). Enter the lidocaine concentration and select the unit (% or mg/ml). Indicate whether epinephrine is present. The calculator will display the maximum safe dose and injectable volume.
User-Friendly Interface

Step-by-Step Examples

  • A doctor inputs 2% lidocaine with epinephrine for an 80 kg patient.
  • A student practices calculations for different concentrations.

Real-World Applications of the Calculator

  • Clinical Use in Hospitals and Clinics
  • Dental and Nerve Block Procedures
  • Medical Education and Training
This calculator is widely used in clinical settings, dental offices, and educational environments. It helps ensure patient safety by preventing lidocaine overdose and guides proper anesthetic administration.
Versatile and Reliable

Clinical Examples

  • A dental student checks the safe volume for a pediatric patient.
  • A paramedic uses the tool in an emergency setting.

Common Misconceptions and Correct Methods

  • Confusing % and mg/ml
  • Overlooking Epinephrine's Effect
  • Ignoring Patient Weight Units
Many users confuse percent (%) and mg/ml when entering concentration. Always double-check the units. Epinephrine increases the maximum safe dose. Ensure the correct weight unit is selected for accurate results.
Avoiding Calculation Errors

Misconception Scenarios

  • A user enters 2 instead of 20 for mg/ml, leading to underdosing.
  • A nurse forgets to select 'with epinephrine' and gets a lower safe dose.

Mathematical Derivation and Examples

  • Dose Formula
  • Concentration Conversion
  • Worked Example
The maximum safe dose is calculated as: Max Dose (mg) = Weight (kg) × Max Dose per kg (mg/kg). For plain lidocaine, use 4.5 mg/kg; with epinephrine, use 7 mg/kg. Concentration in mg/ml is calculated as: % × 10 = mg/ml. Maximum volume (ml) = Max Dose (mg) / Concentration (mg/ml).
Example: 70 kg, 1% Lidocaine, No Epinephrine

Mathematical Examples

  • Max Dose = 70 × 4.5 = 315 mg; 1% = 10 mg/ml; Max Volume = 315 / 10 = 31.5 ml.
  • With epinephrine: Max Dose = 70 × 7 = 490 mg; Max Volume = 490 / 10 = 49 ml.