
Psychro Calc Pro
HVAC Psychrometric Calculator
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About
Psychro Calc Pro is a psychrometric calculator for HVAC engineers and technicians. Calculate dry bulb, wet bulb, dew point, relative humidity, humidity ratio, enthalpy and air density from any two independent properties, at altitudes from −500 m to 11 000 m.
CALCULATION ENGINE
Saturation pressure over water and ice from the Hyland–Wexler equations (ASHRAE Handbook—Fundamentals, Ch. 1), Greenspan (1976) enhancement factor, and the ASHRAE wet bulb equation. Valid from −100 °C to +200 °C.
PSYCHROMETRIC CHART IN PDF REPORTS
Relative humidity, enthalpy, wet bulb and specific volume lines, with automatic Standard, Low Temp and Industrial Drying modes.
REPORTS & HISTORY
SI and IP (Imperial) units throughout — results, chart, PDF reports and history — plus your company logo on PDF reports.
FREE TRIAL, ONE-TIME PURCHASE
Free to download. Try every feature free for 3 days — no payment, no sign-up.
After the trial, unlock everything with a one-time purchase.
No subscription, no recurring fees.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://iklimet-lab.com/privacy-policy/
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What's New in Psychro Calc Pro
1.0.17
October 17, 2026
- IP units throughout: chart axes, lines, point box and PDF report now use °F, gr/lb, Btu/lb and ft³/lb - History shows values in the selected units - Your company logo is kept between sessions - Switching between SI and IP keeps your calculation and converts it - Fixes and improvements
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Subscriptions & In-App Purchases
Monthly Premium
Full access to all psychrometric calculations.
$3.991 Month
3 Days trial




