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Normal Creatinine Levels by Age and Sex
✓ Fact-checked against sourced references · Editorial standards
Creatinine depends on muscle mass, so the normal range varies. Adult values are roughly 0.6–1.2 mg/dL, with men typically a little higher than women.
Why it varies
More muscle means more creatinine. Older adults with less muscle may have lower values that still reflect reduced function — which is why eGFR is more reliable.
Frequently asked questions
Is a creatinine of 1.4 normal?
It is above the typical range for many adults, but muscle mass and age matter. Confirm with eGFR and clinical review.
Sources
Related articles
Educational only. This guide is general kidney-care information, not individual medical advice.