Levey-Jennings Z-Score Calculator
How many SD a control result is from the mean.
About Levey-Jennings Z-Score Calculator
How many SD a control result is from the mean. The Levey-Jennings Z-Score Calculator on Picscaler gives you the answer instantly in your browser, with no sign-up.
Inputs: Control result, Target mean and Standard deviation. Results shown: Z-score and Westgard check.
Formula: z = (result - mean) / SD. Apply the full Westgard multirule set before accepting or rejecting a run.
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 Levey-Jennings Z-Score Calculator
- Enter Control result, Target mean and Standard deviation.
- Press Calculate.
- Read Z-score and Westgard check in the result table.
- Use the formula and notes under the result to check the working.
Frequently asked questions
Is Levey-Jennings Z-Score Calculator free?
Yes. Levey-Jennings Z-Score 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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