LA Calculator

Weight

kg

Combo Calculator

Total equivalent plain lignocaine dose: 100 mg = 32% max
1
%
=

Max Calculator

Drug concentration:
%
Max mg/kg:
Max volume:32 mL

Common Formulations

expand all +
Lignocaine (Plain)
1% Lignocaine (Plain) = 10 mg/mL
Max: 3 mg/kg = 210 mg
21 mL
Max: 4.5 mg/kg = 315 mg
32 mL
Max: 7 mg/kg = 490 mg
49 mL
Max: 9 mg/kg = 630 mg
63 mL
2% Lignocaine (Plain) = 20 mg/mL
Max: 3 mg/kg = 210 mg
11 mL
Max: 4.5 mg/kg = 315 mg
16 mL
Max: 7 mg/kg = 490 mg
25 mL
Max: 9 mg/kg = 630 mg
32 mL
Ropivacaine (Plain)
0.5% Ropivacaine (Plain) = 5 mg/mL
Max: 3 mg/kg = 210 mg
42 mL
0.2% Ropivacaine (Plain) = 2 mg/mL
Max: 3 mg/kg = 210 mg
105 mL
Ropivacaine (+Ad)
0.5% Ropivacaine (+Ad) = 5 mg/mL
Max: 3 mg/kg = 210 mg
42 mL
0.2% Ropivacaine (+Ad) = 2 mg/mL
Max: 3 mg/kg = 210 mg
105 mL
Bupivacaine (Plain)
0.5% Bupivacaine (Plain) = 5 mg/mL
Max: 2.5 mg/kg = 175 mg
35 mL
0.25% Bupivacaine (Plain) = 2.5 mg/mL
Max: 2.5 mg/kg = 175 mg
70 mL
Bupivacaine (+Ad)
0.5% Bupivacaine (+Ad) = 5 mg/mL
Max: 3 mg/kg = 210 mg
42 mL
0.25% Bupivacaine (+Ad) = 2.5 mg/mL
Max: 3 mg/kg = 210 mg
84 mL

Notes

Maximums used:

Lignocaine = Plain: 4.5 mg/kg, With Ad: 7 mg/kg
Ropivacaine = Plain: 3 mg/kg, With Ad: 3 mg/kg
Bupivacaine = Plain: 2.5 mg/kg, With Ad: 3 mg/kg

References

Local anesthetic systemic toxicity: current perspectives, Local Reg Anesth 2018

Local Anaesthetic Poisoning, Royal Childrens Hospital 2018

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