Blood Type Calculator

Predict possible child blood types

🔒 Files never leave your browser

Parent 1 Blood Type

Parent 2 Blood Type

Parent 1 Rh Factor

Parent 2 Rh Factor

This tool is for informational purposes only. Actual blood type must be determined by laboratory testing.

How to Use Blood Type Calculator

Choose first parent blood type (A, B, AB, O) and Rh factor.

Choose second parent blood type and Rh factor.

See possible blood types with probabilities.

How accurate is this? ▼

The calculator shows all possible blood types based on genetics. Actual results depend on specific genotypes which may not be known.

Is there a file size limit? ▼

No strict limit. Processing happens in your browser, so capacity depends on your device memory. Most files work smoothly.

Which browsers are supported? ▼

All modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile.

Can I use this offline? ▼

Yes. Once the page is loaded, the tool works without an internet connection since all processing is local.

Is my data secure? ▼

Yes. Your data never leaves your browser. Nothing is stored on or transmitted to any server.

Does this work on mobile? ▼

Yes. All AllTools tools are fully responsive and work on phones and tablets.

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