Allowable Blood Loss Calculator
Maximum blood loss before reaching a chosen hematocrit.
About Allowable Blood Loss Calculator
Maximum blood loss before reaching a chosen hematocrit. The Allowable Blood Loss Calculator on Picscaler gives you the answer instantly in your browser, with no sign-up.
Inputs: Weight (kg), Blood volume (mL/kg), Starting hematocrit (%) and Lowest acceptable hematocrit (%).
Formula: ABL = EBV x (Hct start - Hct lowest) / average Hct. Typical blood volume: adult male 70 to 75, adult female 65 mL/kg, neonate 85 to 90 mL/kg.
This tool is for education and information. It does not replace clinical judgement, so confirm results against your laboratory's reference ranges and local guidelines.
How to use Allowable Blood Loss Calculator
- Enter Weight (kg), Blood volume (mL/kg), Starting hematocrit (%) and Lowest acceptable hematocrit (%).
- Press Calculate.
- Read the result in the result table.
- Use the formula and notes under the result to check the working.
Frequently asked questions
Is Allowable Blood Loss Calculator free?
Yes. Allowable Blood Loss Calculator is completely free to use on Picscaler.
Do I need to create an account?
No. You can use it straight away without signing up.
Is my data safe?
Your input is processed in your browser on your own device and is not uploaded to Picscaler.
Can I use it for medical decisions?
No. It is an educational aid and does not replace professional medical judgement.
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