Calculated Results
Results appear here immediately after submission.
- Base dose: 0.00 mg
- Renal-adjusted dose: 0.00 mg
- Rounded dose: 0.00 mg
- Concentration strength: 0.00 mg/mL
- Infusion amount per hour: 0.00 mg/hour
- Infusion volume per hour: 0.00 mL/hour
- Capped single dose: No
- Capped daily dose: No
Dose Visualization
Calculator Inputs
Example Data Table
| Scenario | Basis | Weight | Height | Ordered Value | Strength | Estimated Single Dose |
|---|---|---|---|---|---|---|
| Adult oral liquid | mg/kg | 70 kg | 170 cm | 10 mg/kg | 250 mg / 5 mL | 700 mg |
| Oncology support example | mg/m² | 60 kg | 165 cm | 50 mg/m² | 100 mg / 2 mL | 83.5 mg |
| Critical care infusion | mcg/kg/min | 80 kg | 178 cm | 5 mcg/kg/min | 200 mg / 50 mL | 24 mg/hour |
Formula Used
BSA (m²) = √[(height in cm × weight in kg) ÷ 3600]
Dose per administration (mg) = ordered mg/kg × weight (kg)
Dose per administration (mg) = ordered mg/m² × BSA (m²)
mg/hour = [mcg/kg/min × weight (kg) × 60] ÷ 1000
Strength (mg/mL) = concentration amount ÷ concentration volume
Volume (mL) = adjusted dose (mg) ÷ strength (mg/mL)
Daily dose (mg) = single dose (mg) × frequency per day
How to Use This Calculator
- Enter patient weight and height to support weight and BSA calculations.
- Select the dose basis that matches the order format.
- Type the ordered numeric value and choose the displayed dose unit.
- Enter drug concentration using available amount and total volume.
- Add optional renal adjustment, maximum dose limits, and rounding increment.
- Press calculate to display the single dose, daily total, infusion values, and graph above the form.
- Use the CSV or PDF buttons to save the current result summary.
- Verify every result against the official product information and the patient’s clinical status.
Frequently Asked Questions
1. What does this calculator estimate?
It estimates generic medication doses from weight, body surface area, fixed orders, and infusion inputs. It also converts the result into administration volume using the entered concentration.
2. Can I use it for any drug?
Use it only as a general calculation aid. Drug-specific limits, reconstitution steps, route restrictions, and age-based adjustments still require independent verification from authoritative references.
3. Why is body surface area included?
Some therapies are prescribed in mg per square meter rather than mg per kilogram. The calculator uses the Mosteller equation to estimate body surface area from weight and height.
4. What is the renal adjustment factor?
It is a multiplier applied to the base dose. For example, entering 0.5 halves the calculated dose. Only apply a factor when it is specifically justified.
5. How are maximum doses handled?
The calculator compares the result against maximum single and daily thresholds. When a calculated amount exceeds a threshold, the displayed dose is capped at that limit.
6. What does rounding increment mean?
It rounds the adjusted dose to a practical preparation step, such as the nearest 0.5 mg or 1 mg. Use rounding only when it matches approved preparation practice.
7. Why is there an infusion override field?
The override lets you compare a manually entered pump rate with the calculated volume per hour. It is useful for sense-checking prepared infusion settings.
8. Does this replace clinical review?
No. It does not replace prescribing review, pharmacy verification, or bedside safety checks. Always confirm the medication plan with qualified professionals and current guidance.