pHABG · Lab
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Clinical education tool

Read any arterial
blood gas in 5 calm steps.

A precision instrument for medical students, residents, and educators. Plug in pH, PaCO₂, HCO₃⁻ — read the disorder, compensation, anion gap, and Δ/Δ in one calibrated glance.

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Free, no credit card 22 teaching cases Henderson–Hasselbalch verified
Live readoutCalibrated
Acidemia · Severe
7.20pH
6.87.07.27.357.457.67.8

The needle maps pH 6.8–7.8 onto the acid / normal / alkalosis bands. Pick a preset below to see how the spectrum and values move together.

Acidemia <7.35Normal 7.35–7.45Alkalemia >7.45
pH
7.20
PaCO₂
25mmHg
HCO₃⁻
10mEq/L
Primary: Metabolic acidosis with respiratory compensation
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The framework

Five steps. No guesswork.

  1. 01
    Oxygenation
    PaO₂, P/F, A–a gradient
  2. 02
    pH
    Acidemia, alkalemia, normal
  3. 03
    Primary
    Respiratory or metabolic
  4. 04
    Compensation
    Winter's, acute / chronic
  5. 05
    Gap & Δ/Δ
    AG, albumin-corrected, ratio

Four surfaces

One instrument, four modes.

Everything you need to read, calculate, drill, and teach acid–base disorders — without jumping between tabs, PDFs, and a calculator.

Engine

Interpret

Plug in numbers. Get the disorder, compensation, AG, and Δ/Δ — with the reasoning shown step by step.

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Calculator

Solve

Enter any two of pH, PaCO₂, HCO₃⁻ — the third computes live via Henderson–Hasselbalch.

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Quiz

Learn

22 randomized teaching cases with instant scoring and progress that syncs across sessions.

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Studio

Teach

Linked sliders, Davenport overlays, and 2× PNG export for slides and lectures.

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“Built around the formulas you already trust — so the only thing left to think about is the patient.”

Henderson–HasselbalchWinter's formulaAcute / chronic compensationAlbumin-corrected AGΔ/Δ ratioA–a gradientP/F ratio

Start interpreting in under a minute.

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