
| Post. Dia. Wt. (kg) | |
| Ultrafiltrate Vol. (L) | |
| Predialysis BUN | |
| unit | mg/dL mmol/L |
| Postdialysis BUN | |
| unit | mg/dL mmol/L |

Kt/V
=
(-1) × log(Ratio-(0.03))
+ ((4-(3.5 × Ratio)) × (UFVol/Weight))
where
Ratio = Pre BUN/Post BUN;