Diam Calc Pro
Diamonds Weight Calculator Pro
Only for iPhone
USD 3.99 · Designed for iPhone. Not verified for macOS.
iPhone
Professional diamond weight calculator with real gem photography. Calculate carats for all 11 cuts — redesigned with iOS 26 Liquid Glass.
Diam Calc Pro is the professional diamond weight estimator trusted by jewelers, gemologists, and diamond enthusiasts worldwide.
Instantly calculate the estimated carat weight of any diamond using industry-standard formulas. Simply enter the measurements and get accurate results in seconds — no internet required.
11 DIAMOND SHAPES SUPPORTED
• Round Brilliant
• Oval
• Pear
• Heart
• Marquise
• Princess
• Cushion
• Emerald (Step Cut)
• Radiant
• Trilliant
• Asscher (Step Cut)
HOW IT WORKS
Enter the diamond's length, width (for fancy shapes), and height — either as a percentage of diameter or in millimeters. The app returns:
• Average diameter (mm)
• Height percentage (%)
• Height in millimeters (mm)
• Estimated weight in carats (ct)
DESIGNED FOR PROFESSIONALS
Diam Calc Pro is built for speed and accuracy. Whether you're at a trade show, a jewelry bench, or a buying desk, you'll have precise weight estimates at your fingertips.
WHAT'S NEW IN VERSION 3.1.0
Complete redesign built for iOS 26 with Apple's Liquid Glass material system. Real diamond photography, per-shape accent colors, dark & light mode support, animated splash screen, and a fully native SwiftUI interface.
PRIVACY:
No account required. No data collected. No ads. Your calculations stay on your device.
Diam Calc Pro is a paid, ad-free app - a one-time purchase for professionals who demand the best tools.
Thanks for using Diam Calc Pro!
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Version 3.1.0 — Complete Redesign
• All-new interface built natively for iOS 26 with Apple's Liquid Glass material system
• Real diamond photography for all 11 shapes
• Per-shape vibrant accent colors for instant shape recognition
• Full dark mode and light mode support with one-tap toggle
• Height input now accepts both percentage (%) and millimeters (mm)
• Animated splash screen with wireframe diamond illustration
• Faster, more accurate weight calculations using updated industry formulas
• Supports all screen sizes and Dynamic Type
The developer, The Perfect Creative Studio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- The Perfect Creative Studio
- Size
- 9.4 MB
- Category
- Business
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 The Perfect Creative Studio
