Work out urine output per kg instantly with clear inputs, formula shown and shareable results.
Divides measured urine volume by weight and collection hours to give the mL/kg/h figure used in the KDIGO acute kidney injury criteria.
Weight-indexed urine output
Rate = volume (mL) / (weight kg x hours); KDIGO oliguria thresholds are 0.5 mL/kg/h for 6 h and 0.3 mL/kg/h for 24 h
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Less than 0.5 mL/kg/h sustained for at least six hours meets KDIGO stage 1 by urine output.
Yes. Anuria means under 100 mL in 24 hours and is a more severe finding.