For nurses and students

Nursing calculators pack

The everyday calculations, in one place: weight-based dose, IV drip rate, IV pump rate, and tablets or units needed. Each uses the standard public formula and shows the working. This is a learning and revision aid for a professional audience, not a substitute for your institution's policy or an independent second check.

Health information notice

This calculator pack is for education and awareness only. It does not diagnose any condition, rule out disease, recommend treatment or dosing, or replace advice from your institution's policy or a qualified colleague. Results are formula outputs to verify, never an instruction to act.

If you are worried about your health, or if anything here raises a concern, speak to a qualified healthcare professional. Seek urgent medical help for any emergency.

These formulas are taught in nursing programmes worldwide and are provided for education. Every calculation you perform in practice must be verified against your local protocol, the medicine's documentation, and an independent double check before a medicine is prepared or given. Never rely on this tool alone.

Last reviewed: 2026-07-17

Always double-check, every time

These calculators use standard public formulas as a learning and revision aid. They do not replace your institution's policy, an independent second check by a colleague, or your clinical judgement. Verify every result against your local protocol and the medicine's own documentation before preparing or giving anything.

Before you calculate, estimate a sensible ballpark. Afterward, ask whether the result fits it.

Total dose = dose per kg x body weight. Add the stock strength to also get the volume to draw.

Dose per kg

Body weight

Stock strength (optional)

Amount of drug in the stock vial or ampoule.

In this volume (optional)

Volume that stock strength is dissolved in.

Stated maximum single dose (optional)

If set, the result flags when the calculation exceeds it.

Enter a dose per kg and a body weight to calculate.

Sources

Standards of proficiency for registered nurses (numeracy and medicines management) Nursing and Midwifery Council, 2018Registered nurses must be able to calculate and check medicines safely; local policy governs practice.
Tackling number problems: Plan, Estimate, Approach, Calculate, Evaluate Royal College of Nursing, 2026Estimate first, show each step, evaluate the result and seek an independent check.
Medication Without Harm: global patient safety challenge World Health Organization, 2023

Last reviewed: 2026-07-17