Network & PoE Calculator.
Building parameters in, indicative switch count, Wi-Fi 7 access point density, PoE budget (watts), Cat6A run count and port/AP sizing out. Sized to year-three load with 30% headroom.
- Sized to
- Year 3
- Headroom
- 30%
- Cabling
- Cat6A
- Wi-Fi
- Wi-Fi 7
— Switching · Wi-Fi · cabling · BICSI N1 / TIA-942 / IEEE 802.11be informed
Sized to year-three load.
AP density from Cisco / Aruba design guides, cabling aligned to BICSI N1 governance and ANSI/TIA-942 tiers, IEEE 802.11be (Wi-Fi 7) PoE sizing — with 25 % port headroom and 30 % cable-drop spare as a planning convention.
Premium consultation · Commercial tier · Office / corporate
27 APs · 30 switches
Serving 800 concurrent users + 91 PoE endpoints across 1,471 Cat6A drops, with a 1.2 kW PoE budget pool.
Concurrent users
800
1,040 desk ports
Wi-Fi APs
27
Wi-Fi 6E (Aruba 530 / Catalyst 9120)
48-port switches
30
HPE Aruba 6100 / Cisco Catalyst 1300
PoE budget
1.2 kW
across all PoE devices
Cat6A drops
1,471
incl. 30% spare
VLAN segments
6
with QoS classes
- Switching classHPE Aruba 6100 / Cisco Catalyst 1300
- Wi-Fi classWi-Fi 6E (Aruba 530 / Catalyst 9120)
- PoE endpoints91
Assumptions driving this recommendation↓ expand
- Users / m²
- 0.1 (planning convention)
- AP density
- 1 per 303 m²
- AP density basis
- Cisco / Aruba design guides
- Cabling standard
- TIA/EIA-568-C · ISO/IEC 11801 Cat6A
- PoE standard
- IEEE 802.3bt Type 3 / 4
- Wi-Fi standard
- IEEE 802.11be (Wi-Fi 7)
- Uptime tier
- ANSI/TIA-942 Tier-II default
- Cabling governance
- BICSI N1 · design recommendations
- Ports / user
- 1.3 (planning convention)
- Port headroom
- 25%
- Drop spare
- 30%
- PoE per AP
- 25 W (Wi-Fi 7 design margin)
- PoE per camera
- 12 W (mixed fixed/dome)
Operationally sensible ecosystem
Brands grouped by engineering role — not random logos.
Network backbone
Core switching + routing + firewall
- HPE Aruba 6100L2 managed PoE+ for mid-market
- Cisco Catalyst 1300L2 managed PoE+ alternative
- FortiGateMid-market UTM firewall
Wi-Fi access
High-density Wi-Fi 6E / Wi-Fi 7
- HPE Aruba 530Wi-Fi 6E for enterprises
- Cisco Catalyst 9120Wi-Fi 6E with controller
Structured cabling
Cat6A / OM4 / OS2 systems
- PanduitMid-enterprise Cat6A + fibre
- CommScope SYSTIMAXMid-enterprise system
Indicative — AP density modelled against Cisco / Aruba design guides; user, port-per-user and PoE-per-device figures are planning conventions, not standard-mandated. Cabling follows TIA/EIA-568-C and ISO/IEC 11801 Cat6A, PoE follows IEEE 802.3bt, and the uptime tier defaults to ANSI/TIA-942 Tier-II. Final design follows a coverage / capacity heat-map (Ekahau / iBwave), a site survey and consultant review, and verifies cable lengths against IEEE 802.3bt PSE-to-PD derating tables.
Translate into a briefPricing · written estimate after review
Need a price for this scope?
Share your drawings, BOQ or project brief on WhatsApp/call +91 88110 34444 or email info@technoguru.in for a written estimate after review. Pricing depends on drawings, site conditions, system scope, brand selection, cabling stage, integration depth, commissioning, logistics, GST, approvals and support expectations — so we prepare it per project after a technical review rather than publishing standard rates.
Size the PoE budget· Engineering advisory · Network & PoE Calculator
What the sizing answer means for the building.
Switch count and PoE budget are the visible outputs, but the four notes below frame what the sizing decision predicts about rack space, cable plant, lifecycle and the building's growth path.
Deployment observations
- Sizing to year-three demand with 30 percent headroom is the disciplined default for commercial buildings — but raise the headroom to 50 percent for healthcare and mission-critical campuses, where device-count growth is non-linear and each port is on the critical path.
- PoE budget at switch level must be specified at full-load worst-case (e.g. all cameras and APs simultaneously powered), not nominal — the calculator's 2.4 kW figure assumes 80 percent simultaneity. Verify with the actual PoE class table for the chosen camera and AP models before ordering switches.
- Wi-Fi 7 versus Wi-Fi 6E is a 5-7 year decision, not a today decision. The price gap to Wi-Fi 6E has closed; if the building is new construction with a 7-year refresh horizon, the answer is Wi-Fi 7 today. Retrofit decisions follow the existing cable plant's PoE capacity.
Redundancy posture
- 10G uplinks per access switch should be at least dual-pathed to the core for any building above 200 endpoints — single-uplink topologies have a single point of failure that takes a floor offline on switchport degradation. The marginal cost is one 10G port per switch.
Operational notes
- Stacked-switch configuration (3-4 PoE+ switches in a stack) is one logical entity for operations — single management plane, single configuration baseline, automatic failover. Specify stack-capable switches as the floor; the marginal price difference is paid back in the first MAC-address move-add-change.
- Cable-plant labelling against the architect's grid (room-system-cable_id) is the discipline that pays back at every device move. Without labelling, every change becomes a tracing exercise; with labelling, a typical office floor's move takes hours, not days.
Lifecycle implications
- Cat6A copper plant is a 20-year asset — three switch generations and two Wi-Fi generations ride the same cable. The cost of pulling Cat6A versus Cat6 at first install is 8-12 percent; the cost of rip-and-replace later is 4-6x the differential. Specify Cat6A as the floor.
- Switch refresh cadence is 7-9 years for enterprise (Cisco / Aruba / Juniper) versus 5-7 years for SMB (Ubiquiti / Netgear). The choice is set by the operations team's tolerance for management upgrade cycles, not by the day-one hardware tier.
· Example use
A 40,000 sq ft commercial office sized for 220 wired endpoints and 350 wireless devices lands on three 48-port PoE+ switches with two 10G uplinks, twelve Wi-Fi 7 access points, around 2.4 kW of PoE budget and 280 Cat6A runs. With 30 percent headroom factored in. The same office under-designed at year-one demand falls over by year three — and rewiring an occupied building is the most expensive mistake in low-voltage.
· Frequently asked
Network sizing —
what people ask first.
Why size to year-three with 30 percent headroom?
Networks rarely shrink. Headcount grows, devices multiply, and PoE-powered cameras, access readers and AV endpoints get added every year. Sizing to year-one demand without headroom forces a refresh inside the warranty period; sizing to year-three with headroom holds for the design life.
Wi-Fi 7 — is it really the right call today?
For new buildings, yes. The price gap to Wi-Fi 6E has closed, the 6 GHz band gives the cleanest spectrum we have ever had, and the access-point lifecycle is seven years minimum. Specifying Wi-Fi 6 today means a refresh in 2029. Wi-Fi 7 holds.
Cat6A or Cat7?
Cat6A. It is the workhorse standard, supports 10 Gbps to 100 metres, has a stable connector ecosystem and is half the price of Cat7. Cat7 has no meaningful field advantage in commercial buildings; Cat8 is data-centre territory only.
Which switch and AP brands?
Cisco Catalyst and Meraki for enterprise, Aruba for mixed estates, Ruckus for hospitality, Ubiquiti UniFi for premium residential and small commercial. PoE budgeting is identical across vendors; the choice is on management, warranty and lifecycle.
What about segmentation, VLANs and security?
Standard scope. Every project ships with a VLAN plan — corporate, guest, IoT, AV, ELV, BMS — and a layer-three policy at the core. Zero-trust micro-segmentation is an upgrade option, recommended for healthcare, finance and any building with sensitive data flows.
· Begin
Specifying a network
that has to hold for a decade?
Send the floor plates, the headcount, the device profile and the operating context. We will return a sized design within two working days; pricing follows a written estimate after review.