SpO2 Calculator

Calculate the percentage of oxygen-saturated hemoglobin.

  • Free Online Tool
  • Instant Results
  • Mobile Friendly
  • No Installation
  • Secure & Private

Understanding This Calculator

SpO2 Formula

Oxygen saturation (SpO2) is the ratio of oxygenated hemoglobin to the total amount of hemoglobin.

SpO2 (%) = (Oxygenated Hb / Total Hb) × 100

  • Oxygenated Hb: Hemoglobin carrying oxygen
  • Total Hb: Oxygenated + Deoxygenated Hemoglobin

Example 1

Oxygenated Hb 98, Total Hb 100.

  • Calculation: (98 / 100) × 100
  • SpO2: 98%

Example 2

Oxygenated Hb 90, Total Hb 100.

  • Calculation: (90 / 100) × 100
  • SpO2: 90%

How to Use

  • Enter Oxygenated Hb value.
  • Enter Total Hb value.

Frequently Asked Questions

Is this medical advice?

No, this tool is for informational purposes only. Always consult a healthcare professional for medical advice.

Is this calculator free to use?

Yes, this calculator is 100% free and does not require any registration or subscription.

Is it mobile-friendly?

Absolutely! Our tool is optimized for all devices, including mobile phones, tablets, and desktop computers.