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Blood Test Tracker

AFP unit converter

Convert AFP between ng/mL and IU/mL. Type in either box. The factors come from our catalog and are checked by code.

AI-verified against cited sources. Awaiting expert reviewLast reviewed 2026-10-03

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1 ng/mL = 0.8264 IU/mL. Nothing you type here leaves your browser.

The conversion

  • 1 ng/mL = 0.8264 IU/mLFrom ng/mL to IU/mL: divide by 1.21. Back again: multiply by 1.21.

ng/mL and µg/L give the same number. IU/mL and kIU/L give the same number.

Common values

From zero to about twice the usual upper limit, plus the usual limits themselves.

AFP values in ng/mL and IU/mL
ng/mLsame as µg/LIU/mLsame as kIU/L
21.7
43.3
4.73.9
5.74.7
65
6.45.3
6.95.7
86.6
8.46.9
8.77.2
9.27.6
108.3
129.9
1411.6
1613.2
1814.9

Usual ranges in each unit

What labs print as the reference range, by who was tested. Sources for each range are on the AFP page.

Usual ranges for AFP in ng/mL and IU/mL
Whong/mLIU/mL
18+0–8.40–6.9
Men, 18–300–5.70–4.7
Women, 18–300–4.70–3.9
Men, 31–500–6.90–5.7
Women, 31–500–6.40–5.3
Men, 51–800–8.40–6.9
Women, 51–800–9.20–7.6
Men, 81+0–6.40–5.3
Women, 81+0–8.70–7.2
10–21.40–17.7
Men, 20–9.40–7.8
Women, 20–10.10–8.3
3–40–5.50–4.5
Men, 50–3.60–3
Women, 50–4.20–3.5
6–120–3.90–3.2
13–170–4.30–3.6