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Open Dose Calculator →Methotrexate
Methotrexate
💊 Used for: Malignant disorders, Juvenile rheumatoid arthritis
Formulation
Tablet
Standard tablet
Dose Range
0.1–0.5 mg/kg
Max Daily
N/A
Frequency
As directed
Max Single
25 mg
Route: oral
Dose by Child Weight
Based on formulation: Standard tablet
| Child's Weight | Dose (mg) | Dose (ml) | Max Daily Dose (mg) |
|---|---|---|---|
| 5 kg | 1–3 mg | 0.5–2.5 ml | — |
| 6 kg | 1–3 mg | 0.6–3.0 ml | — |
| 7 kg | 1–4 mg | 0.7–3.5 ml | — |
| 8 kg | 1–4 mg | 0.8–4.0 ml | — |
| 9 kg | 1–5 mg | 0.9–4.5 ml | — |
| 10 kg | 1–5 mg | 1.0–5.0 ml | — |
| 12 kg | 1–6 mg | 1.2–6.0 ml | — |
| 15 kg | 2–8 mg | 1.5–7.5 ml | — |
| 18 kg | 2–9 mg | 1.8–9.0 ml | — |
| 20 kg | 2–10 mg | 2.0–10.0 ml | — |
| 25 kg | 3–13 mg | 2.5–12.5 ml | — |
| 30 kg | 3–15 mg | 3.0–15.0 ml | — |
* Always verify with your doctor. doses are approximate and may vary based on condition and formulation.
⚠️ Important Warnings
- •Bone marrow suppression
- •Hepatic dysfunction
💡 Use the DoseCare Calculator for interactive dose calculations tailored to your child's exact weight and formulation.
DoseCare is a decision support tool only. Always verify doses with a qualified healthcare provider.