TTKG Calculator

Net K secretion by distal nephron before the effect of ADH, correcting for water reabsorption via urine osmolality.
TTKG = (Urine K / Plasma K) × (Plasma Osm / Urine Osm)

Urine K (mmol/L) :

Urine Osm (mOsm/kg) :

Plasma K (mmol/L) :

Plasma Osm (mOsm/kg) :

※ TTKG is valid when urine Na ≥ 25 mEq/L and urine Osm ≥ plasma Osm.
Hypokalemia
TTKG ＜ 3 : appropriate renal response
TTKG ＞ 7 : renal K wasting
Hyperkalemia
TTKG ＜ 6 : inappropriate renal response