CD4 count unit converter
Convert CD4 count between cells/µL and ×10⁹/L. 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
1 cells/µL = 0.001 ×10⁹/L. Nothing you type here leaves your browser.
The conversion
- 1 cells/µL = 0.001 ×10⁹/LFrom cells/µL to ×10⁹/L: divide by 1,000. Back again: multiply by 1,000.
×10⁹/L and ×10³/µL give the same number.
Common values
From zero to about twice the usual upper limit, plus the usual limits themselves.
| cells/µL | ×10⁹/Lsame as ×10³/µL |
|---|---|
| 200 | 0.2 |
| 490 | 0.49 |
| 500 | 0.5 |
| 1,000 | 1 |
| 1,500 | 1.5 |
| 1,600 | 1.6 |
| 2,000 | 2 |
| 2,500 | 2.5 |
| 3,000 | 3 |
Usual ranges in each unit
What labs print as the reference range, by who was tested. Sources for each range are on the CD4 count page.
| Who | cells/µL | ×10⁹/L |
|---|---|---|
| 16–64 | 430–1,800 | 0.43–1.8 |
| 65+ | 490–1,600 | 0.49–1.6 |
| 2–4 | 500–2,700 | 0.5–2.7 |
| 5–9 | 400–2,500 | 0.4–2.5 |
| 10–15 | 400–2,100 | 0.4–2.1 |