Patch Cable Length Calculator
Independent & chassis switches • Devices • Multiple cabinets (row) • Multiple trays
? Quick help
Cabinet Configuration
%
| # | Name | Cabinet spacing → next | Height (U) | Cable managers (U, comma sep) |
|---|
Switch Configuration
Name each chassis and (optionally) override Start U per cabinet.
Per-cabinet chassis names
Devices
Default device offset is 17 cm.
Project / Config
Saved locally in this browser. Use Export/Import for sharing or backups.
Tray Configuration
Set a name and vertical gap (from top of rack) for each tray.
| # | Name | Vertical gap (top of rack ↕) |
|---|
Manual Input
Bulk Input
Patching Assigner
DCIM Cab
Connection Parameters
Applies to manual, bulk, and the visual.
For 48-port panels, split is 1–24 left, 25–48 right (auto).
In “Up & over” mode, a fixed 10 cm route slack is added by default.
Patch Panel Ports
Switch Ports
Visual Route
Racks & panels Patch lead route
Assumptions & Constants
Quick Help
Use this tool to calculate patch cable lengths between patch panels, switches, and devices across one or more rack cabinets.
- Routing Path: Choose Through the center or Up & over (tray). In Up & over, the cable goes from PP to the top of its rack, up the tray gap, across, down the tray gap, then down to the endpoint. A fixed 10 cm route slack is added in this mode.
- Trays: Configure multiple trays above, set names and gap values, then select a tray when routing = “Up & over”.
- Manual Input: Click a port bubble to auto-fill fields — results update live.
- Bulk Input: Paste rows in the specified format to compute many at once.
- Export: Download CSV/XLSX for ordering and documentation.
- Save: Use quick saves locally, or Export/Import JSON to share.
- Link: cablehelp.dvdp.co.uk
Close
Bulk Cable Length Calculator
Use spaces, tabs, or commas. Blade is optional (defaults to 1 in the “with blade” format).
The Rack must match a cabinet name. For chassis mode, the Switch must match a per-cabinet chassis name.
The Rack must match a cabinet name. For chassis mode, the Switch must match a per-cabinet chassis name.
Sets 24/48 for bulk math & visual.
Patching Assigner Settings
Chassis Blade Settings
Switch Port Map
Define VLAN port ranges per switch.
Cable List
Format: Cable Label VLAN