Emergency Drug Calculator

Use our free Emergency Drug Calculator to quickly estimate weight-based emergency drug doses (mg) and convert them to volume (mL) using drug concentration. Ideal for clinicians, EMS, and advanced first-responders — always confirm with local ACLS/PALS protocols and pharmacy.

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Patient & Drug

EMERGENCY: Call 911 immediately for life-threatening situations.

Patient Weight

Weight Unit

Patient Age (years)

Select Emergency Drug

Calculated Dosage

Recommended Dose

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Route—

Concentration—

Instructions

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Contraindications

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For educational and reference purposes only. Always follow your institution’s ACLS/PALS protocols and verify all calculations with a qualified clinician before administration.

Emergency Drug Dosing Formula

Dose (mg) = Patient weight (kg) × Drug dose (mg/kg)

ExampleEpinephrine (cardiac arrest, child): 0.01 mg/kg IV/IO (repeat every 3–5 min), max single dose ≈ 1 mg. Example: 15 kg child → 15 × 0.01 = 0.15 mg. If concentration is 0.1 mg/mL, volume = 0.15 ÷ 0.1 = 1.5 mL. Naloxone (opioid overdose): Adults: IV initial doses commonly 0.4–2 mg IV (or 4 mg intranasal devices); titrate to effect. Pediatric dosing varies—use weight-based local protocol. Example: 70 kg adult → 0.4–2 mg IV initial (follow local guidance). Amiodarone (VF/pulseless VT): Adult bolus 300 mg IV/IO; second dose 150 mg if needed. Pediatric: 5 mg/kg IV/IO bolus during arrest (may repeat per protocol). Example adult: output 300 mg; pediatric 20 kg → 20 × 5 = 100 mg. Epinephrine (adult cardiac arrest): 1 mg IV/IO every 3–5 min. Example: adult standard bolus = 1 mg (10 mL of 1:10,000 = 0.1 mg/mL).

These formulas convert weight-based mg/kg rules into absolute mg and then into mL using the vial/syringe concentration. Always confirm concentration labeling (e.g., 1:10,000 epinephrine = 0.1 mg/mL; 1 mg/10 mL) before drawing medication.

How this Emergency Drug Calculator works

The calculator applies guideline dosing rules (e.g., ACLS for adults, PALS for children, NHS naloxone guidance) to compute a recommended mg dose from patient weight and selected indication. It then converts mg to mL using the selected concentration. For some drugs (e.g., epinephrine) guideline doses differ by scenario (anaphylaxis vs cardiac arrest vs EpiPen dosing), so the calculator chooses the rule based on the selected scenario. Always cross-check with the actual published protocol and pharmacy labeling.

When to use this Emergency Drug Calculator

For quick bedside conversion of weight-based emergency doses into mg and mL.

When preparing pediatric emergency drug syringes during resuscitation.

For EMS / first responders to confirm dose volumes given available vial concentrations.

To standardize prefilled syringe labeling in code carts (then validate with pharmacy).

As an educational tool in simulation and training (always verify live clinical care with protocols).

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Typical Emergency-Dose Ranges (Guideline examples)

Below are common guideline ranges for selected emergency drugs. Use them as starting points — local protocols may differ.

Epinephrine (cardiac arrest) — Adult

1 mg IV/IO every 3–5 min

Epinephrine (pediatric arrest)

0.01 mg/kg IV/IO (max ≈ 1 mg)

Amiodarone

Adult bolus 300 mg IV/IO for VF/pulseless VT; pediatric 5 mg/kg

Naloxone

Adult IV 0.4–2 mg initial; intranasal devices commonly 2 mg or 4 mg per device. Titrate to response.

These benchmarks are widely used starting points; always follow your local ACLS/PALS/NHS protocols and consult pharmacy or clinical leadership for final dosing and preparation.

Frequently Asked Questions

Is this calculator a substitute for clinical judgment?

No. This tool provides estimates based on guidelines; always confirm doses with local protocols and a licensed clinician.

Which guideline sources are used?

The calculator references ACLS/PALS guidance and national protocols (e.g., AHA, PALS, NHS). Specific dosing rules are shown and cited on the page.

How do concentrations map to volumes?

Volume (mL) = Dose (mg) ÷ Concentration (mg/mL). Confirm vial labeling (e.g., epinephrine 1:10,000 = 0.1 mg/mL).

Is pediatric dosing different from adult dosing?

Yes. Many pediatric emergency drugs use weight-based mg/kg dosing (e.g., epinephrine 0.01 mg/kg). Use PALS rules for children

Will this calculator handle autoinjectors or intranasal devices?

The calculator can convert to equivalent mg and recommend common device strengths (e.g., naloxone 4 mg IN devices), but device selection should follow local availability and protocol.

What about maximum single doses?

Some guidelines specify maximums (e.g., pediatric epinephrine often capped near 1 mg). The calculator will show guideline maxes where appropriate.

Can I change the concentration for the conversion?

Yes — choose the vial/syringe concentration you have on hand (the tool uses that to compute mL). Always verify pharmacy labeling.

Who is responsible if the dose is incorrect?

This is a clinical tool for estimation. Final dosing decisions, drawing up medication, and administration are the responsibility of licensed clinicians and must follow local policy.

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