What is a normal minute ventilation in adults?

At rest, normal minute ventilation is approximately 5–8 L/min. Values below 5 L/min suggest hypoventilation; values above 10 L/min at rest may indicate hyperventilation or increased metabolic demand.

What is the difference between minute ventilation and alveolar ventilation?

Minute ventilation (MV) includes all air moved per minute, including dead space. Alveolar ventilation (VA) subtracts the anatomical dead space (roughly 2 mL/kg or ~150 mL in adults) to estimate air that actually participates in gas exchange.

What tidal volume is used in lung-protective ventilation?

Lung-protective strategies target 6 mL/kg of ideal body weight (IBW), sometimes up to 8 mL/kg, to reduce ventilator-induced lung injury (VILI) in ARDS.

Can I use mL for tidal volume?

Yes. The calculator accepts both mL and L. Typical adult tidal volume is 400–600 mL (0.4–0.6 L) during quiet breathing.

How does respiratory rate affect CO2 elimination?

CO2 elimination is proportional to alveolar ventilation. Doubling the respiratory rate (while keeping tidal volume constant) roughly halves PaCO2, which is the basis for treating respiratory acidosis by increasing ventilator rate.

Minute Ventilation Calculator

Enter tidal volume and respiratory rate to calculate minute ventilation (MV = VT × RR) with normal range reference.

Ventilation Parameters

Tidal Volume (V_T)

Normal adult quiet breathing: 400–600 mL

Respiratory Rate (RR) breaths/min

Normal adult: 12–20 breaths/min

Anatomical Dead Space (V_D) optional

Typical adult: ~150 mL (≈2 mL/kg IBW)

Minute Ventilation (MV)

—

L/min

Alveolar Ventilation (V_A)

—

Enter dead space to compute

Normal Range Reference

Adult at rest 5–8 L/min

Adult (light exercise) ~20 L/min

Adult (maximal exercise) up to 150 L/min

Typical RR 12–20 breaths/min

Typical VT (quiet) 400–600 mL

Summary

Minute ventilation (MV) is the total volume of air moved into the lungs each minute, calculated as tidal volume (VT) multiplied by respiratory rate (RR). It is a fundamental parameter in both spontaneously breathing patients and those on mechanical ventilation. This calculator also derives alveolar ventilation when anatomical dead space is provided.

How it works

Enter the tidal volume (VT) — the volume of air moved per breath.
Enter the respiratory rate (RR) — the number of breaths per minute.
The calculator multiplies VT × RR to give minute ventilation in L/min.
Optional: enter anatomical dead space to compute alveolar ventilation (VA = (VT − VD) × RR).
Compare results against the normal adult range (5–8 L/min at rest).

Use cases

Assess ventilatory status in ICU or ED patients.
Verify adequate ventilation settings on a mechanical ventilator.
Estimate alveolar ventilation when dead space is known.
Screen for hyperventilation or hypoventilation syndromes.
Teach respiratory physiology concepts to students and trainees.
Quick bedside check after adjusting ventilator tidal volume or rate.

Frequently Asked Questions

Last updated: 2026-06-04 · Reviewed by Nham Vu