Free Wi-Fi heatmap planner: plan your access points in 5 simple steps.

It depends on coverage (walls, materials, target RSSI) and capacity (clients and throughput). Enter both, then compare the forecast with an on-site survey.

Around -65 dBm suits voice and video; -67 dBm is a common enterprise data target; -70 dBm is basic coverage.

Yes. Planning, the forecast, the on-screen heatmap and a watermarked image export are free. A watermark-free HD export and PDF design report is a paid option.

No. The floor plan is processed in your browser. Only planning numbers, such as floor size, band and chosen AP models, are sent to look up model data.

Cisco Meraki, Cisco Catalyst, HPE Aruba Networking, Aruba Instant On, Ubiquiti UniFi, Ruckus, Juniper Mist, Extreme Networks, TP-Link Omada, Fortinet FortiAP, Huawei AirEngine, Zyxel, NETGEAR Insight, Cambium Networks, WatchGuard, Ruijie Reyee, Grandstream, MikroTik, D-Link Nuclias and generic models.

Each model carries its Wi-Fi generation, spatial streams on 2.4, 5 and 6 GHz, and antenna gain. Models marked with a tick were checked against the manufacturer's datasheet or spec page; models marked est. use the brand's family specification until we confirm that exact datasheet. From these the planner works out transmit power, throughput and client capacity for the band and channel width you choose. Always check the current datasheet before you buy.

Signal Plan uses a COST-231 multi-wall (Motley-Keenan) model with a calibrated path-loss exponent. Predicted RSSI = EIRP - L1m - 10 x n x log10(d) - sum of wall losses x band factor - slab loss - link margin. L1m is the free-space loss at the 1 m reference distance (40.2, 47.1 and 48.7 dB at 2.4, 5 and 6 GHz), n is the path-loss exponent (1.9 for an open office up to 3.1 for high attenuation) and d is the 3-D slant distance from the ceiling access point to a client at 1.2 m. Every wall that the straight line from the access point to the point crosses adds its loss, scaled by 1.0, 1.2 and 1.35 at 2.4, 5 and 6 GHz. A fixed 8 dB link margin covers client antenna, body loss and fading. Multi-floor designs add a slab loss where each extra floor adds 60% of the first, a simplification of the COST-231 non-linear floor factor. The model is deterministic and downlink only, and it does not model multipath, diffraction or co-channel interference.

EIRP is transmit power plus antenna gain. Each access point is balanced to a 15 dBm client plus the model's antenna gain, less 2 dB because datasheet gain is a peak value (the vendor's average-pattern gain is used where published). At 6 GHz EIRP is capped at the indoor low-power limit of 5 dBm per MHz and 30 dBm. RSSI is compared with a minimum target such as -65 dBm; the noise floor on a 20 MHz channel is about -95 dBm, so -65 dBm leaves roughly 30 dB of SNR. Throughput per access point comes from spatial streams, channel width, the highest modulation and coding scheme of the standard (802.11n, ac, ax or be), a MAC efficiency of 40 to 45 percent, and MU-MIMO counted as half a stream for each stream beyond two. Client capacity scales with Wi-Fi generation, band and streams. Roaming backup is the share of the floor where the second-strongest access point is at -72 dBm or better. Placement is a greedy search that maximizes a coverage utility over a sampled grid, with a spacing penalty so units do not cluster.

Yes. Choose a PDF in step 1 and the planner draws one page to an image inside your browser. If the PDF has several pages you pick the page. The file is not uploaded. Set the scale afterwards, as with any plan.

It is a planning estimate based on distance, walls, band and the published datasheet specifications of the access points you choose. Real buildings differ, so validate it with an on-site survey before buying or installing equipment.