Calculate the required belt length for drive systems using open or cross belt arrangements. Input pulley diameters and center distance to get the precise belt length needed.






248+ iOS apps curated and reviewed
If you already know Belt Length Calculator Pro, this is the deeper bench. 248+ belt length calculator pro apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | $2.99 | 2.3★ (3) | No | No | Aug 2026 | ||
| 2 | Free | — | No | No | May 2026 | ||
| 3 | $1.99 | — | No | No | Oct 2026 | ||
| 4 | Free | — | No | No | Jun 2026 | ||
| 5 | $3.99 | — | No | No | May 2026 | ||
| 6 | Free | 4.7★ (61K) | No | No | Oct 2026 | ||
| 7 | Free | 4.9★ (409K) | Yes | No | Oct 2026 | ||
| 8 | $2.99 | 3.7★ (34) | No | No | Oct 2026 |






Calculate the required belt length for drive systems using open or cross belt arrangements. Input pulley diameters and center distance to get the precise belt length needed.









Calculate the necessary length for drive system belts with this utility. Supports both open and cross belt arrangements, requiring only pulley diameters and center length for accurate results.