{"id":"hematocrit","name":"Hematocrit","shortName":"Hematocrit","aliases":["HCT","PCV","Packed Cell Volume","Haematocrit","Hematocrit (Calculated)","Hematocrit, Spun","Hct","Hematocrit (HCT)","Packed Cell Volume (PCV)","Hematocrit, Whole Blood","Hematocrit, Automated","Haematocrit (Hct)","Hematócrito","Hämatokrit","Erythrocyte Volume Fraction","EVF","Hematocrit, Microhematocrit"],"abbreviations":["HCT","Hct","PCV","EVF"],"loinc":[{"code":"4544-3","primary":true},{"code":"20570-8","primary":false},{"code":"4545-0","primary":false},{"code":"71833-8","primary":false}],"specimen":"whole-blood","units":[{"ucum":"%","display":"%"},{"ucum":"L/L","display":"L/L"}],"referenceRanges":[{"population":"Men, 13+","low":37.5,"high":51,"unit":"%","unitDisplay":"%","note":"Labcorp's interval for people older than 12 (the primary one here). Other labs differ: Mayo Clinic Laboratories 38.3-48.6%, ARUP 44.2-53% (age 18 and older), Health NZ Waikato 0.40-0.52 L/L, and StatPearls quotes 40-54%. Labcorp does not split teens from adults for hematocrit.","sources":[{"title":"Critical (Panic) Values, with adult reference intervals (document DX_TL_811850, January 2024)","url":"https://www.labcorp.com/content/dam/labcorp/drupal/811850_DX_TL_Critical(Panic)Values011924_FINAL.pdf","publisher":"Labcorp","year":2024},{"title":"Pediatric Testing Reference Ranges (CBC With Differential/Platelet, test 005009)","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp","year":2022},{"title":"CBC - Overview: Complete Blood Cell Count (CBC) with Differential, Blood","url":"https://www.mayocliniclabs.com/test-catalog/Overview/9109","publisher":"Mayo Clinic Laboratories"},{"title":"CBC with Platelet Count and Automated Differential (test 0040003), Hotline effective March 1, 2021","url":"https://ltd.aruplab.com/api/ltd/hotline/0040003/44232","publisher":"ARUP Laboratories","year":2021},{"title":"CBC reference intervals (procedure HEM-2597.01, effective 14 November 2024)","url":"https://lab.waikatodhb.health.nz/assets/test-attachments/230/CBC-reference-intervals.pdf","publisher":"Te Whatu Ora Health New Zealand, Waikato","year":2024},{"title":"Hematocrit","url":"https://www.ncbi.nlm.nih.gov/books/NBK542276/","publisher":"StatPearls (NCBI Bookshelf)"}]},{"population":"Women, 13+","low":34,"high":46.6,"unit":"%","unitDisplay":"%","note":"Labcorp's interval for people older than 12 (the primary one here). Other labs differ: Mayo Clinic Laboratories 35.5-44.9%, ARUP 36-49% (age 18 and older), Health NZ Waikato 0.35-0.46 L/L, and StatPearls quotes 36-48%.","sources":[{"title":"Critical (Panic) Values, with adult reference intervals (document DX_TL_811850, January 2024)","url":"https://www.labcorp.com/content/dam/labcorp/drupal/811850_DX_TL_Critical(Panic)Values011924_FINAL.pdf","publisher":"Labcorp","year":2024},{"title":"Pediatric Testing Reference Ranges (CBC With Differential/Platelet, test 005009)","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp","year":2022},{"title":"CBC - Overview: Complete Blood Cell Count (CBC) with Differential, Blood","url":"https://www.mayocliniclabs.com/test-catalog/Overview/9109","publisher":"Mayo Clinic Laboratories"},{"title":"CBC with Platelet Count and Automated Differential (test 0040003), Hotline effective March 1, 2021","url":"https://ltd.aruplab.com/api/ltd/hotline/0040003/44232","publisher":"ARUP Laboratories","year":2021},{"title":"CBC reference intervals (procedure HEM-2597.01, effective 14 November 2024)","url":"https://lab.waikatodhb.health.nz/assets/test-attachments/230/CBC-reference-intervals.pdf","publisher":"Te Whatu Ora Health New Zealand, Waikato","year":2024},{"title":"Hematocrit","url":"https://www.ncbi.nlm.nih.gov/books/NBK542276/","publisher":"StatPearls (NCBI Bookshelf)"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The share of your blood made up of red blood cells, shown as a percent. It usually moves together with hemoglobin.","url":"https://bloodtesttracker.com/markers/hematocrit","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}