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Amikacin
Aminoglycoside, IV/IM by weight
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Amoxicillin
Standard & high-dose, by weight
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Amoxicillin-Clavulanate (Co-amoxiclav)
Dosed by amoxicillin component
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Ampicillin
Oral & parenteral-range, by weight
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Azithromycin
3-day, 5-day & typhoid regimens
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Cefixime
3rd-gen oral cephalosporin, by weight
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Cefotaxime
3rd-gen cephalosporin, IV/IM
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Cefpodoxime
3rd-gen oral cephalosporin, by weight
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Ceftazidime
Anti-pseudomonal cephalosporin, IV/IM
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Ceftriaxone
3rd-gen cephalosporin, IV/IM
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Cefuroxime
2nd-gen cephalosporin, oral & IV
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Cephalexin
1st-gen cephalosporin, by weight
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Ciprofloxacin
UTI, typhoid & complicated infection
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Clarithromycin
Macrolide, respiratory & H. pylori
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Clindamycin
Anaerobic & penicillin-allergy dosing
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Cloxacillin
Anti-staphylococcal penicillin, by weight
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Co-trimoxazole (TMP-SMX)
UTI, PCP treatment & prophylaxis
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Doxycycline
Tetracycline, ≥8 years, by weight
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Erythromycin
Macrolide, penicillin-allergy option
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Fosfomycin
Uncomplicated UTI & severe/IV infection
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Gentamicin
Aminoglycoside, IV/IM by weight
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Levofloxacin
Fluoroquinolone, by weight
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Linezolid
MRSA & VRE, by age group and weight
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Meropenem
Carbapenem, broad-spectrum IV
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Metronidazole
Anaerobic, amoebiasis & giardiasis
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Nitrofurantoin
Uncomplicated UTI treatment & prophylaxis
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Piperacillin-Tazobactam
Broad-spectrum IV, by piperacillin component
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Rifampicin
Meningococcal & Hib contact prophylaxis
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Tinidazole
Giardiasis & amoebiasis, short-course
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Vancomycin
Glycopeptide, MRSA, IV by weight
About these calculators
Each calculator computes a weight-based dose from the selected indication's published mg/kg/day range, splits it across the recommended dosing frequency, applies the adult maximum dose cap, and — where a liquid suspension is selected — converts the per-dose amount into a volume in mL from the chosen concentration.
These are general, representative dosing ranges drawn from standard paediatric and adult antimicrobial references (BNF for Children, WHO, IAP/Nelson's guidance) — always cross-check against your local antibiotic policy, the product insert, and the patient's renal/hepatic function, allergy history, and local resistance patterns before prescribing.