Professional Coating Inspection Calculator
DFT/WFT conversion, dew point, spread rate, surface profile — all the calculations coating inspectors need, in one app. 100% offline.
Built for Coating Inspectors
Every calculation you need in the field — accurate, fast, and always available offline.
DFT/WFT Calculator
Convert between wet and dry film thickness instantly. Supports both WFT to DFT and DFT to WFT modes with volume solids input.
Dew Point Calculator
Calculate dew point from air temperature and relative humidity using the Magnus formula. Instantly check if conditions meet the 3°C delta T requirement.
Ambient Condition Check
GO/NO-GO assessment for coating application. Checks delta T compliance and humidity limits in one tap.
Spread Rate Calculator
Calculate theoretical and practical spread rates based on volume solids, target DFT, and transfer efficiency. Includes paint consumption per m².
Surface Profile Calculator
Enter multiple blast profile readings, set min/max specifications, and get instant compliance verification with average depth calculation.
Abrasive Consumption
Estimate abrasive usage for blast cleaning based on surface area, abrasive type, profile requirements, and number of passes. Supports 8 abrasive types.
Start Inspecting in Seconds
Download & Open
Get CoatInspect Pro free from the App Store. No account needed, works offline immediately.
Select Calculator
Choose from 6 professional calculators: DFT/WFT, Dew Point, Spread Rate, Surface Profile, Ambient Check, or Abrasive Consumption.
Get Results
Enter your values, tap Calculate. Share results with your team or save to calculation history for your records.
Why Inspectors Trust CoatInspect Pro
Field-Ready
100% offline. No internet needed on the job site — whether you're on an oil rig, bridge, or ship. All calculations happen on-device.
Industry Accurate
Calculations based on SSPC, ISO, and NACE standards. Magnus formula for dew point. Verified formulas trusted by AMPP-certified inspectors.
Designed for Inspectors
Built specifically for coating inspection workflows. No generic calculator bloat — every feature serves a real field need. Large touch targets for gloved hands.
Built-in Reference Library
Quick access to the standards you reference daily.
Coating Standards
SSPC-SP1 through SP16, ISO 8501, NACE equivalents. Surface preparation standards at a glance.
Abrasive Selection Guide
8 abrasive types with typical profile ranges, advantages, and selection criteria.
Surface Preparation Methods
Solvent cleaning, hand/power tool, blast cleaning, water jetting — methods, advantages, and limitations.
Choose Your Plan
Start free with core calculators. Upgrade for the full professional toolkit.
Free
$0
- DFT/WFT Calculator
- Dew Point Calculator
- Ambient Condition Check
- Calculation History
- Reference Guides
- Spread Rate Calculator
- Surface Profile Calculator
- Abrasive Consumption Calculator
Pro
$19.99/year
or $1.99/week
Best Value- Everything in Free
- Spread Rate Calculator
- Surface Profile Calculator
- Abrasive Consumption Calculator
- All Future Features
Trusted by Inspectors Worldwide
Based on user reviews
Frequently Asked Questions
What formulas are used for the calculations?
DFT/WFT uses the standard volume solids conversion formula. Dew point uses the Magnus-Tetens approximation (a=17.27, b=237.7°C). Spread rate uses the theoretical coverage formula with transfer efficiency adjustment. All formulas are consistent with SSPC, ISO, and NACE standards.
What's the difference between Free and Pro?
The free version includes DFT/WFT Calculator, Dew Point Calculator, and Ambient Condition Check — the three most-used calculations. Pro adds Spread Rate, Surface Profile, and Abrasive Consumption calculators, plus all future features.
Can I share calculation results?
Yes. Every calculation result includes a Share button that generates a formatted text summary you can send via email, message, or any app on your device.
What units are supported?
CoatInspect Pro supports both Metric (°C, microns, m², L) and Imperial (°F, mils, ft², gal) unit systems. Switch anytime in Settings.
Is my calculation history saved?
Yes. The app stores your last 50 calculations locally on your device. You can mark calculations as favorites for quick access and delete individual records or clear all history.
What abrasive types are supported?
Steel Grit, Steel Shot, Garnet, Aluminum Oxide, Glass Bead, Copper Slag, Coal Slag, and Silicon Carbide — each with industry-standard consumption rates.
How do I restore my purchase on a new device?
Go to Settings → Restore Purchases. Your subscription is tied to your Apple ID and will restore automatically.
Get in Touch
Have a question, feature request, or found a bug? We'd love to hear from you.
Or email us directly at [email protected]
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Download CoatInspect Pro free. No account required.