Pediatric
dosing,
by the gram.
A clinician-referenced bench of 13 weight-adjusted calculators — so a tired parent at 3 a.m., a nurse cross-checking an order, and a resident new to peds can all land on the same safe number.
Select a medication, enter a weight.
Each tab below opens a guideline-referenced calculator. Live, max-dose capped, and rounded to the gradations on a standard oral syringe.
Prednisolone Pediatric Dose Calculator
Evidence-based weight-adjusted dosing
Guideline-referenced dosing. All calculators reference current AAP, IDSA, NASPGHAN, and KDIGO guidelines. Doses are weight-based with automatic max-dose capping. For educational reference only — always verify with the prescribing clinician.
What Are Pediatric Dose Calculators?
A pediatric dose calculator takes a child's weight in kilograms and, depending on the medication, the clinical indication and dosing frequency, then returns the correct daily dose in milligrams and the per-dose volume in milliliters. That's the core job — no guesswork, no mental math, no room for the rounding errors that lead to under- or over-dosing.
Children are not small adults. Drug metabolism, kidney clearance, and body composition all change dramatically from infancy through adolescence. A flat “give one teaspoon” instruction doesn't account for a 10 kg toddler versus a 35 kg pre-teen. Weight-based dosing — expressed in mg per kg — is the standard that every pediatric guideline uses, and it's the foundation of every calculator on this site.
Each tool covers one specific drug: antibiotics like Augmentin (amoxicillin-clavulanate), cefdinir, and azithromycin; steroids like prednisolone and dexamethasone; antiemetics like ondansetron; acid-suppressants like omeprazole and famotidine; and others. Every calculator applies the current clinical guideline for that drug, caps doses at published maximums, and calculates the liquid volume based on the concentration you select.
How to Use These Pediatric Dose Calculators
How We Calculate Pediatric Doses
Pediatric Medication Dosing Guide
Weight-based dosing: why kilograms matter
Pediatric dosing is governed by the child's lean body weight, expressed as a target dose in mg per kg per day. This approach accounts for the fact that a child's hepatic metabolism and renal clearance scale roughly with body size. Once the weight-based calculation exceeds the adult maximum dose, the adult maximum applies — a child never gets more than an adult would.
Understanding liquid concentrations (mg/mL)
Most pediatric medications come as liquid suspensions because children can't reliably swallow tablets. Augmentin 250 mg/5 mL contains 50 mg/mL; Augmentin 400 mg/5 mL contains 80 mg/mL. If you measure the same mL volume from both bottles, you get very different mg doses. This is why the concentration selection in each calculator is not optional.
Reading your results: daily dose vs. per-dose
Calculators return two numbers: a total daily dose in mg and a per-dose volume in mL. Always administer the per-dose volume, not the full daily dose in one go. Use an oral dosing syringe — not a kitchen teaspoon, which can be off by 20–30%.
When to call your pediatrician or pharmacist
Call the prescribing provider if: the weight-based calculation differs significantly from what was prescribed; the pharmacist dispensed a different concentration than the prescription specifies; the child's weight has changed substantially since the prescription was written; or the child has kidney or liver disease. A 20% deviation from the calculated dose warrants a conversation.
Who Uses These Pediatric Dose Calculators?
Parents and caregivers use these tools to confirm a prescription before giving a dose. If a pharmacist prints “give 4.5 mL twice daily” on the label and the calculator independently produces the same number, you can administer with confidence.
Pediatric nurses and nurse practitioners use weight-based dosing tools at bedside or in outpatient clinics to cross-check orders — particularly for less familiar drugs or after a child's weight has changed.
Pharmacy and medical students use these calculators when learning weight-based dosing. Seeing the live calculation builds intuition that sticks better than textbook tables.
International healthcare workers in settings without reference texts rely on these tools when treating children with common infections. Whatever your role, verify against the prescribing clinician's order and your institution's current protocol.
Frequently Asked Questions
The standard dose for an acute asthma exacerbation in children is 1–2 mg/kg/day, with most guidelines recommending approximately 1.5 mg/kg/day. The maximum daily dose is typically capped at 60 mg. A typical treatment course lasts 3–5 days, and tapering is generally not required for short courses under 7 days.
Prednisolone is the active metabolite of prednisone. In children, prednisolone is generally preferred because it is available as a palatable liquid formulation and does not require hepatic conversion. The dosing is equivalent milligram-for-milligram, but prednisolone has better bioavailability in young children whose liver metabolism may be immature.
The two most commonly available concentrations are 15 mg/5 mL (3 mg/mL) and 25 mg/5 mL (5 mg/mL). The 15 mg/5 mL formulation, such as Orapred, is more commonly prescribed for younger children because smaller volumes are easier to measure accurately. The 25 mg/5 mL concentration is useful for older or heavier children to reduce the total volume needed.
Short courses of 3–5 days are generally considered safe and do not require tapering. Courses extending beyond 7–10 days may require a gradual taper to avoid adrenal suppression. Long-term use (weeks to months) requires close monitoring for side effects including growth suppression, immune suppression, and metabolic changes. Always follow physician guidance for duration.
Yes, prednisolone can and should be given with food or milk to reduce gastrointestinal irritation. The liquid formulation can be mixed with a small amount of juice or flavored drink to improve palatability, though it should not be mixed with large volumes of liquid as the child may not consume the full dose.
For croup, the recommended prednisolone dose is 1 mg/kg as a single dose, with a maximum of 60 mg. This is typically administered once and may be repeated once the following day if symptoms persist. Dexamethasone at 0.6 mg/kg is an alternative, but prednisolone is used when dexamethasone is unavailable or when a liquid formulation is preferred.
For most indications including asthma and croup, the entire daily dose is given once in the morning to mimic the body's natural cortisol rhythm and minimize sleep disruption. For nephrotic syndrome or higher doses, some protocols divide the daily dose into two doses (morning and evening) to improve tolerability. Follow your prescriber's specific instructions.
Common short-term side effects include increased appetite, mood changes (irritability or hyperactivity), trouble sleeping, and stomach upset. These typically resolve after the medication is discontinued. Long-term side effects with extended use include weight gain, growth suppression, increased infection risk, elevated blood sugar, and bone density changes.
This calculator is designed for pediatric patients generally weighing 1 kg and above. Neonatal dosing may require different considerations including adjusted body weight, renal maturity, and specific neonatal protocols. For neonates, always consult a neonatologist or pediatric pharmacist for individualized dosing.
The maximum daily dose depends on the indication. For asthma and general anti-inflammatory use, the cap is typically 60 mg/day. For nephrotic syndrome, some protocols allow up to 80 mg/day during induction. These maximums apply regardless of the child's weight — once the weight-based calculation exceeds the cap, the maximum dose is used instead.