Wi-Fi Access Point & PoE Switch Capacity Calculator
Calculate Wi-Fi access point counts by coverage area and client capacity, PoE switch power budget, and minimum ISP internet line bandwidth.
Input Parameters
Calculation Results
- Area per Floor
- 300 m²
- Number of Building Floors
- 1 Floors
- Environment & Partition Type
- office
- Total Wi-Fi Users / Devices
- 80 Devices
- Wi-Fi Generation Standard
- wifi6
- Effective Coverage Area per AP
- 120 m²
- Max Active Clients per AP Radio
- 65 Clients
- APs Required by Area Coverage
- 3 Units
- APs Required by User Density
- 2 Units
- Primary AP Sizing Limiting Factor
- Coverage Area (Coverage-bound)
- Minimum Access Points per Floor
- 3 Units
- Total Recommended Access Points
- 3 Units
- Total PoE+ Switch Power Budget
- 58 Watts
- Recommended ISP Internet Bandwidth
- 200 Mbps
- Transmit Power (dBm) Tuning Advice
- 2.4GHz: Low (10-12 dBm) | 5GHz: Medium (16-18 dBm)
- RF Channel Planning Recommendation
- 2.4 GHz: Ch 1, 6, 11 (Width 20MHz) | 5 GHz: Ch 36, 40, 44, 48, 149, 153, 157, 161 (Width 40MHz)
Isolate management, server, user, and IoT/CCTV traffic into dedicated 802.1Q VLANs.
Ringkasan Perencanaan WiFi Access Point – InfraCalc.web.id Luas Bangunan : 300 m² (1 Lantai), Tipe: OFFICE Total Pengguna : 80 Concurrent Users, Standar: WIFI6 Rekomendasi AP : 3 Unit AP (±3 AP per Lantai) Daya Switch PoE: Minimal 58 Watt Bandwidth ISP : Minimal 200 Mbps Dedicated TX Power Roaming: 2.4GHz: Low (10-12 dBm) | 5GHz: Medium (16-18 dBm) Channel Plan : 2.4 GHz: Ch 1, 6, 11 (Width 20MHz) | 5 GHz: Ch 36, 40, 44, 48, 149, 153, 157, 161 (Width 40MHz)
Visual Network Topology Generator (SVG / PNG)
Generate Project BoQ / Cost Estimate (RAB)
| Kode | Material & Equipment | Qty (+15%) | Unit | Unit Price (IDR) | Line Total (IDR) |
|---|---|---|---|---|---|
| WIFI-AP6 | Enterprise Wi-Fi 6 Ceiling Access Point (AX3000 PoE+) Dual-Band OFDMA MU-MIMO, 802.11k/v/r | 4 | Unit | Rp 7.800.000 | |
| POE-SW | Gigabit Smart Managed PoE+ Switch (802.3at) VLAN Segmentation & PoE Watchdog | 1 | Unit | Rp 2.450.000 | |
| GW-CTRL | MikroTik Core Router & WLAN Controller Gateway FQ-CoDel Queue & Captive Portal | 1 | Unit | Rp 3.250.000 | |
| UTP-CAT6 | Cat6 Solid Copper Cable (305m Box) & Hardware Includes RJ45 plugs & patch cords | 2(Base: 1) | Box | Rp 3.700.000 | |
| Equipment & Material Subtotal: | Rp 17.200.000 | ||||
| Estimated Installation & Commissioning (10%): | Rp 1.720.000 | ||||
| PPN (11%): | Rp 2.081.200 | ||||
| ESTIMATED GRAND TOTAL: | Rp 21.001.200 | ||||
Note: Unit prices above are initial reference estimates and can be edited inline.Referensi Teknis & BoQ — Built for Network & System Engineers
Technical Accuracy Note: Calculation results are engineering estimates based on standard RFC/IEEE/ITU-T models. Actual field performance may vary due to protocol overhead, hardware specifications, and environmental factors.
How to Use This Tool
- Enter the total building floor area (m²), number of floors, and select the room wall partition profile (Open Space, Office, or Concrete).
- Specify expected concurrent active client devices and select the deployed Wi-Fi standard (Wi-Fi 5 or Wi-Fi 6/7).
- Review the recommended AP count per floor, PoE switch power requirements, dedicated ISP bandwidth, and non-overlapping channel scheme.
Worked Example: Partitioned Office 300 m² (80 Clients, Wi-Fi 6)
Worked example: A floor area of 300 m² (1 floor(s), office layout) serving 80 concurrent users on wifi6 calls for 3 Access Points (±3 APs/floor, governed by Coverage Area (Coverage-bound)). Requires a PoE switch budget of at least 58 Watts and a dedicated ISP connection of at least 200 Mbps.
- Building Area
- 300 m²
- Number of Floors
- 1 Floors
- Environment & Wall Partition Type
- Office / Drywall & Glass Partitions (~120 m²/AP)
- Total Concurrent Active Users
- 80 Devices
- Wi-Fi Generation Standard
- Wi-Fi 6 / 802.11ax (Max ~65 active clients/AP OFDMA, PoE 15.4W)
- Area per Floor
- 300 m²
- Number of Building Floors
- 1 Floors
- Environment & Partition Type
- office
- Total Wi-Fi Users / Devices
- 80 Devices
- Wi-Fi Generation Standard
- wifi6
- Effective Coverage Area per AP
- 120 m²
- Max Active Clients per AP Radio
- 65 Clients
- APs Required by Area Coverage
- 3 Units
- APs Required by User Density
- 2 Units
- Primary AP Sizing Limiting Factor
- Coverage Area (Coverage-bound)
- Minimum Access Points per Floor
- 3 Units
- Total Recommended Access Points
- 3 Units
- Total PoE+ Switch Power Budget
- 58 Watts
- Recommended ISP Internet Bandwidth
- 200 Mbps
- Transmit Power (dBm) Tuning Advice
- 2.4GHz: Low (10-12 dBm) | 5GHz: Medium (16-18 dBm)
- RF Channel Planning Recommendation
- 2.4 GHz: Ch 1, 6, 11 (Width 20MHz) | 5 GHz: Ch 36, 40, 44, 48, 149, 153, 157, 161 (Width 40MHz)
- Material Requirement Summary (Copy-Ready)
- Ringkasan Perencanaan WiFi Access Point – InfraCalc.web.id Luas Bangunan : 300 m² (1 Lantai), Tipe: OFFICE Total Pengguna : 80 Concurrent Users, Standar: WIFI6 Rekomendasi AP : 3 Unit AP (±3 AP per Lantai) Daya Switch PoE: Minimal 58 Watt Bandwidth ISP : Minimal 200 Mbps Dedicated TX Power Roaming: 2.4GHz: Low (10-12 dBm) | 5GHz: Medium (16-18 dBm) Channel Plan : 2.4 GHz: Ch 1, 6, 11 (Width 20MHz) | 5 GHz: Ch 36, 40, 44, 48, 149, 153, 157, 161 (Width 40MHz)
Core Concept & Engineering Notes
How It Was Calculated (Formulas & Steps)
Mathematical Formulas
- Coverage APs = ceil(Floor Area / Coverage per AP by Partition Type)
- Capacity APs = ceil(Total Users / Max Active Clients per AP by Wi-Fi Standard)
- Governing Factor = max(Coverage APs, Capacity APs)
- Total Building APs = ceil(Governing APs / Floors) × Floors
- PoE Switch Budget = ceil(Total APs × AP Wattage × 1.25) Watts (Cable Headroom)
- ISP Bandwidth = max(50, ceil((Total Users × 2.5 Mbps) / 10) × 10) Dedicated Mbps
Step-by-Step Calculation
- 1. Coverage AP Requirement: ceil(300 m² / 120 m² per AP for office) = 3 APs
- 2. Capacity AP Requirement: ceil(80 users / 65 max active clients for wifi6) = 2 APs
- 3. Governing Factor: Coverage Area (Coverage-bound) -> Taking max(3, 2) = 3 APs
- 4. Multi-Floor Distribution: ceil(3 / 1 floors) = 3 APs/floor × 1 floors = 3 Total APs
- 5. PoE Switch Sizing with +25% Margin: ceil(3 APs × 15.4 W × 1.25) = 58 Watts
- 6. ISP Bandwidth Sizing: max(50, ceil((80 users × 2.5 Mbps) / 10) × 10) = 200 Mbps Dedicated
- 7. Non-Overlapping Channel Scheme: 2.4 GHz: Ch 1, 6, 11 (Width 20MHz) | 5 GHz: Ch 36, 40, 44, 48, 149, 153, 157, 161 (Width 40MHz)
Frequently Asked Questions (FAQ)
Why should 2.4 GHz Wi-Fi deployments exclusively utilize channels 1, 6, and 11?
In the 2.4 GHz band with 20 MHz channel widths, adjacent channels overlap significantly. Channels 1, 6, and 11 are the only three distinct channels that do not overlap or corrupt each other's transmissions. Utilizing intermediate channels like 3 or 8 creates destructive adjacent-channel interference.
Why should AP transmit power (TX power) not be configured to maximum (High/Auto)?
Client devices (smartphones, laptops) possess battery-constrained transmitters (~10–14 dBm) compared to APs (~20–25 dBm). If an AP broadcasts at maximum power, clients hear the beacon clearly but their return signals fail to reach the AP. Moreover, oversized RF cells cause clients to stick to distant APs instead of roaming.
What advantage does OFDMA in Wi-Fi 6 offer over Wi-Fi 5?
In Wi-Fi 5, only one client can transmit or receive per time slot across an entire channel. Wi-Fi 6 subdivides channels into dozens of smaller Resource Units (RUs), enabling the AP to service multiple clients simultaneously in parallel, cutting packet latency by up to 75% in high-density environments.
Why does the PoE switch power budget require a 25% safety margin?
Long Ethernet cable runs dissipate power via copper loop resistance (voltage drop). Furthermore, Wi-Fi 6 radios experience peak power spikes during simultaneous background spectrum scans and heavy burst downloads. A 25% margin prevents PoE switches from overcurrent trips and sudden reboots.
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References & Notes
- CWNP — Certified Wireless Design Professional (CWDP) Study Guide
- Wi-Fi Alliance — Wi-Fi CERTIFIED 6 Technology Overview
- Cisco Enterprise Mobility 8.5 Design Guide — High Density Wireless
Note: Results above are mathematical estimates based on standard formulas. Always verify against official vendor documentation and site conditions before production deployment.
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Engineering Sensitivity Analysis, Response Curve & Technical Citation
1. 1. 3-Point Engineering Sensitivity & Tolerance Envelope
Comparative evaluation across theoretical laboratory bounds (0% loss), current nominal operating point, and conservative field safety bounds (±15% thermal/aging derating).
| Evaluated Parameter | Ideal Theoretical Bound | Nominal Operating Point | Conservative Safety Bound (±15%) | Engineering Derating Rule |
|---|---|---|---|---|
| Area per Floor | 270 | 300 | 345 | Engineering Safety Margin (+15% Overhead) |
| Number of Building Floors | 0.9 | 1 | 1.15 | Engineering Safety Margin (+15% Overhead) |
| Total Wi-Fi Users / Devices | 72 | 80 | 92 | Engineering Safety Margin (+15% Overhead) |
| Effective Coverage Area per AP | 108 | 120 | 138 | Engineering Safety Margin (+15% Overhead) |
| Max Active Clients per AP Radio | 58.5 | 65 | 74.75 | Engineering Safety Margin (+15% Overhead) |
2. 2. Mathematical Function Curve & Operating Coordinate (x₀, y₀)
3. 3. Physical Constants & Normative Standard Clauses
DC Loop Resistance for 23 AWG Solid Copper Cat6
Clause 6.4.1 / Table 145-1 — Nominal 23 AWG solid copper loop resistance at 20°C is 14.0 Ω/100m (TIA maximum ceiling is 18.8 Ω/100m).
Single-Mode Optical Fiber Attenuation Coefficient at 1490 nm
Table 1 / Class B+ & C+ Optical Path — Typical G.652.D attenuation at 1490 nm downstream is 0.22–0.25 dB/km (1310 nm upstream: 0.35 dB/km).
Temperature Coefficient of Resistance for Copper
International Annealed Copper Standard — Used in thermal derating equation: R(T) = R_20 × [1 + 0.00393 × (T - 20)].
4. 4. Independent Technical & Academic Citation (IEEE / APA 7th / BibTeX / LaTeX)
Use the standard citation formats below to reference this computational methodology in engineering specifications, audit reports, or academic papers.
[IEEE] KalkuNet Engineering Team, "Wi-Fi Access Point & PoE Switch Capacity Calculator — Standard Engineering Computational Instrument," KalkuNet Technical Suite, 2026. [Online]. Available: https://kalkunet.com/en/tools/wifi-ap-calculator. [Accessed: 2026-11-08].
[APA 7th] KalkuNet Engineering Team. (2026). Wi-Fi Access Point & PoE Switch Capacity Calculator (Production release 2026-11-08) [Engineering computational software]. KalkuNet. https://kalkunet.com/en/tools/wifi-ap-calculator
@software{kalkunet_wifi_ap_calculator_2026,
author = {{KalkuNet Engineering Team}},
title = {{Wi-Fi Access Point & PoE Switch Capacity Calculator --- KalkuNet Engineering Suite}},
year = {2026},
publisher = {KalkuNet.com},
url = {https://kalkunet.com/en/tools/wifi-ap-calculator},
urldate = {2026-11-08}
}
% LaTeX Engineering Derivation — Generated via https://kalkunet.com/en/tools/wifi-ap-calculator
\begin{equation}
\text{Model: } Coverage APs = ceil(Floor Area / Coverage per AP by Partition Type)
\end{equation}
% Parameter Input Terukur: areaSqm = 300, \; floors = 1, \; envType = office, \; totalUsers = 80
% Hasil Evaluasi Numerik : areaSqm = \mathbf{300}, \; floors = \mathbf{1}, \; envType = \mathbf{office}