You’re inCalculator corner
10 free questionsFull Pass $29 · one time
Calculator corner · Study guide

Intake and Output Calculator

Add up intake and output and get the net fluid balance for a shift, with ounce to mL conversion. Free nursing calculator with an example.

Use calculator

What it does

Totals a patient’s intake and output and gives the net fluid balance for the shift.

How it works

net balance = total intake − total output. This study tool uses the nursing approximation 1 US fl oz ≈ 30 mL.

Worked example

24 oz oral (720 mL) plus 500 mL IV is 1220 mL in; 700 mL urine out; net balance +520 mL.

Good to know

Count every source, oral, IV, tube, drains and emesis, to make the balance meaningful.

Open the interactive calculator

Sources and study limits