Exact patch lengths for your entire datacenter.
SpanWise routes each patch along your cable ducts — not as the crow flies — and returns the route, the exact cut length and a patch list your technician can work from.
The tape measure is not a planning tool
Lengths get estimated, or measured as the crow flies. Either way they're wrong.
Too-long patches leave metres of slack coiled in the tray, wrecking airflow.
Wrong lengths mean reordering mid-install — and waiting.
So your technician ends up on the floor with a tape measure.
One route? Use the free calculator.
Two racks, one patch cord: work out the patch cable length for a single route, with the full breakdown and the standard length to order.
How it works
Import your floorplan
Load the drawing you already have and set the scale. No asset database, no port mapping.
Draw the cable ducts
Trace trays, risers and crossings once. Racks and ducts rarely change — neither does this.
Click two racks
You get the route, the exact cut length and a print-ready patch list PDF.
The output your technician actually wants
Patch list with cut lengths, fibre counts and from/to rack labels — ready for the floor.
A page per route with the floorplan, the drawn route and a scale bar.
Every metre is auditable.
No black box — every metre accounted for
duct 19.8 + risers 0.8 + trunks 0.0 + allowance 4.0 + slack 0.0 = 24.6 m
The cut length is a sum you can check, not a guess: duct distance, risers, trunk segments, termination allowance and slack. It's printed on every route page.
Not a DCIM — and that's the point
Mature DCIM suites calculate cable lengths too — after you've modelled every device, port and terminator, and for as long as you keep that model true. If you need a digital twin, buy one. SpanWise answers one question: how long is the patch between these two racks?
Days, not quarters
Floorplan in, ducts drawn, first cut lengths the same week you start.
Nothing to keep alive
Racks and cable trays rarely move. Leave the model untouched for a year and the answer is still right.
Works in someone else's datacenter
Integrators, installers and tenants don't get the colo's DCIM. A floorplan and what you can see on the floor is enough.
If you need a DCIM, we're not it. If you need exact patch lengths, we're faster, cheaper — and we ship the cable too.
Why on-prem
One static binary
No stack to run: no database cluster, no containers, no agents. Copy it onto a machine and it works.
Air-gapped friendly
No licence pings, no telemetry, no cloud dependency. Runs where the internet doesn't.
Your floorplans stay yours
Plans and duct layouts never leave your environment.
From length to delivery
SpanWise ends where FiberNxt begins: it gives you the exact length, we supply the patch cable cut to it — tested, labelled, delivered.
A first look
v0.1 previewScreenshots from the current development build. The UI will change; the numbers won't.
Register your interest
SpanWise is in development and we're selecting early-access participants. Early users steer the roadmap — tell us how you patch today.