ATPS to BTPS Calculator

Converts measured gas volume or flow from ambient conditions to body temperature saturated conditions using table factors.

Inputs

Color mode links each input to the matching equation term and solving arithmetic.

Equation and Work

Equation:
Solving steps:
Corrected BTPS value
—
same unit
Factor
—
ATPS to BTPS
Temperature
—
°C

Clinical Significance

Converts measured gas volume or flow from ambient conditions to body temperature saturated conditions using table factors.

This calculator expands that idea by identifying the relevant measured values, substituting the selected inputs, and carrying the arithmetic through in the solving steps.

Useful for pulmonary-function volumes and flows when the device does not automatically correct ambient-temperature measurements to body temperature.

These table factors assume PB = 760 mmHg. Use a full gas-volume correction equation when pressure differs substantially.

References (APA 7th Edition)

  1. Chang, D. W. (2020). Respiratory Care Calculations (Revised 4th ed.). Jones & Bartlett Learning. Formula content adapted from the uploaded text/reference packet.