Apgar Score Calculator — Rex's Toolbox

Rex says

Same equations the textbooks use — just way less awkward. Pop in your stats and I'll tell you what the number actually means for you.

Try a scenario

Click to load — tweak from there.

Inputs

Appearance (skin color) 0–2

Pulse 0–2

Grimace (reflex) 0–2

Activity (tone) 0–2

Respiration 0–2

Result

Apgar score

Interpretation band

Reassuring (7–10)

Score as percentage

90%

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How to use this

1Enter appearance (skin color) 0–2.
2Enter pulse 0–2.
3Enter grimace (reflex) 0–2.
4Enter activity (tone) 0–2.
5Enter respiration 0–2.
6Read your apgar score on the right — it updates as you type.
7Hit Share to keep the scenario or send it to someone.

About this calculator

Add appearance, pulse, grimace, activity, and respiration into the standard 0–10 Apgar score used at one and five minutes after birth.

FormulaSum of five criteria scored 0, 1, or 2 each.

Worked example

Using the values the calculator loads with:

Inputs

Appearance (skin color) 0–2: 2
Pulse 0–2: 2
Grimace (reflex) 0–2: 1
Activity (tone) 0–2: 2
Respiration 0–2: 2

Results

Apgar score: 9
Interpretation band: Reassuring (7–10)
Score as percentage: 90%

What each field means

Inputs

Appearance (skin color) 0–2: The appearance (skin color) 0–2 used in the calculation. Starts at 2 so you have a working example on load. Accepted range: 0–2.
Pulse 0–2: The pulse 0–2 used in the calculation. Starts at 2 so you have a working example on load. Accepted range: 0–2.
Grimace (reflex) 0–2: The grimace (reflex) 0–2 used in the calculation. Starts at 1 so you have a working example on load. Accepted range: 0–2.
Activity (tone) 0–2: The activity (tone) 0–2 used in the calculation. Starts at 2 so you have a working example on load. Accepted range: 0–2.
Respiration 0–2: The respiration 0–2 used in the calculation. Starts at 2 so you have a working example on load. Accepted range: 0–2.

Results

Apgar score: Returned as a whole number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Interpretation band: Returned as a plain value. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Score as percentage: Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.

FAQ

Does a low one-minute score predict outcomes?

Not on its own. The five-minute score and its trend matter far more, and Apgar was never designed as a prognostic tool.

When is it scored?

At one and five minutes, and every five minutes thereafter if the score stays below 7.

Accuracy and limitations

Population formulas describe averages; individual bodies vary, especially at the extremes of height, age, or muscle mass.
Results do not account for medical conditions, medication, or pregnancy.
Use this as a directional reference, not a diagnosis — talk to a clinician before acting on it.

Cite this calculator

Writing about this topic? Grab a citation — every link helps keep these tools free.

APA

RevenueLab. (2026). Apgar Score Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/apgar-score

HTML

<p>Source: <a href="https://www.revenuelab.fyi/toolbox/apgar-score" target="_blank" rel="noopener">Apgar Score Calculator — RevenueLab</a> (2026).</p>

Markdown

Source: [Apgar Score Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/apgar-score) (2026).