Easily convert real-world dimensions to model sizes and vice versa across numerous scales. Supports various input formats and offers a comparative view across multiple hobby groups. Works offline with no account or ads.






249+ iOS apps curated and reviewed
Out of 249+ model scale calculator apps on iOS, 18 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 5.0★ (1) | No | No | Oct 2026 | ||
| 2 | Free | 2.9★ (12) | No | No | Oct 2026 | ||
| 3 | Free | 3.7★ (3) | No | Yes | Oct 2026 | ||
| 4 | Free | — | No | No | May 2026 | ||
| 5 | Free | 2.0★ (2) | Yes | No | May 2026 | ||
| 6 | $4.99 | 4.2★ (5) | No | No | Nov 2026 | ||
| 7 | Free | — | No | Yes | Oct 2026 | ||
| 8 | Free | — | — | No | Jun 2026 |






Easily convert real-world dimensions to model sizes and vice versa across numerous scales. Supports various input formats and offers a comparative view across multiple hobby groups. Works offline with no account or ads.

This tool instantly converts measurements between U.S. Customary and Metric units for any modeling scale. It's designed to be fast, easy, and efficient for all types of scale modelers.



Easily convert distances between any scales for projects like architecture and model building. Input your measurements and desired scale to instantly calculate scaled distances.