State-point analysis
Enter temperature and humidity to automatically calculate dew point, wet-bulb temperature, enthalpy, humidity ratio, specific volume, and more. State points can also be plotted on the psychrometric chart.
PWA / Works on smartphone, desktop, and tablet / Japanese & English / SI & IP(US)
Psychrometric Calculator for HVAC, made practical for field work and design review.
A psychrometric calculator app built for HVAC engineers, maintenance staff, construction managers, designers, and commissioning teams. From state-point analysis to HVAC process calculation, air mixing, and PDF export, it keeps the workflow in one place.
- Quick checks on site with a smartphone
- Clear comparison and review on desktop in the office
- Free includes state-point analysis. Pro adds process calculation, mixing, and PDF export.
Easy to use on site
Designed for quick checks on a smartphone during commissioning, maintenance, and troubleshooting.
Useful for engineering review
On PC and tablet, the wider layout makes it easier to compare conditions and review results.
From calculation to reporting
It does not stop at calculation. PDF export makes it easier to record and share results.
Features
The calculations needed for psychrometric work, brought together in one practical tool
Built to balance speed for field work and enough detail for engineering review, from basic state-point analysis to advanced calculations.
HVAC process calculation
Supports cooling and dehumidification, heating, humidification, and arbitrary changes. It also calculates required heat load, cooling capacity, heating capacity, humidification amount, and dehumidification amount.
Air mixing calculation
Supports mixing calculations for two air streams. Useful for outdoor-air mixing and engineering checks where quick condition review matters.
PDF export
Export results from each screen as PDF. Easier for reports, records, internal sharing, and discussion materials.
Language and unit switching
Supports Japanese and English, plus SI and IP(US) units. Easier to use across different teams and projects.
Built as a PWA
Runs directly in the browser and is easier to use even offline. It keeps the experience consistent across field and office environments.
Screens
Screen preview
See the core workflow at a glance, from state-point analysis and HVAC process calculation to air mixing and PDF export.
Check state points quickly
A core screen for on-site measurement review and fast condition checks.
Track process changes and required capacity
Follow cooling, dehumidification, heating, and humidification changes through to required capacity.
Review mixing conditions
Useful for practical tasks like outdoor-air and return-air mixing checks.
Save results as PDF
Makes reporting, recording, and sharing easier.
Use Cases
Clear use cases from on-site checks to design review
Commissioning and adjustment
Check air properties from temperature and humidity on the spot, including dew point and enthalpy, to speed up adjustment decisions.
Maintenance and inspection
Use calculations to verify condition changes and treatment amounts, making findings easier to explain.
Construction management
Export results as PDF for site reports, stakeholder sharing, and better record keeping.
Design and engineering review
Organize conditions on desktop or tablet and compare process and mixing calculations more comfortably.
For Engineers
Not just fast calculations, but a format that fits real work
By connecting numerical checks, process changes, capacity calculations, mixing review, and PDF export in one app, the workflow is less likely to split between field and office work.
- Get the numbers you need right away for faster decisions
- State points on the chart make explanations easier
- Process calculations let you track treatment amounts
- Mixing calculations are handled in the same app
- PDF export fits reporting and record workflows
- Supports Japanese/English and SI/IP(US)
Plans
Start free, move to Pro when you need it for real work
The free plan is an easy entry point for state-point analysis. Pro extends the workflow with process calculation, mixing, and PDF export.
Free
Try state-point analysis for free
- Automatic calculation from temperature and humidity input
- State-point plotting on the psychrometric chart
- Japanese / English switching
- SI / IP(US) switching
Pro
One-time Pro purchase Available immediately after purchase
Expand into practical HVAC work
- State-point analysis
- HVAC process calculation
- Heat load and capacity calculations
- Air mixing calculation
- PDF export
- Field-friendly PWA access
| Item | Free | Pro |
|---|---|---|
| State-point analysis | ○ | ○ |
| State-point display on chart | ○ | ○ |
| HVAC process calculation | - | ○ |
| Heat load and capacity calculation | - | ○ |
| Air mixing calculation | - | ○ |
| PDF export | - | ○ |
| Japanese / English | ○ | ○ |
| SI / IP(US) | ○ | ○ |
FAQ
Questions before getting started
Can I use it on site?
Yes. It is designed to be easy to use on a smartphone for commissioning and inspection work.
Is it also easy to review on PC?
Yes. On desktop or tablet, the wider layout helps with organizing conditions and reviewing results.
What is included in the free version?
The free version includes state-point analysis. Process calculation, mixing calculation, and PDF export are available in Pro.
Can I switch language and units?
Yes. It supports Japanese / English and SI / IP(US), so it can fit different users and projects.
Start Now
Bring psychrometric calculation into one workflow, from field checks to sharing results
Start with the free version for state-point analysis, then move to Pro when you need more. Bring a psychrometric calculator app into daily work across both mobile and desktop.