UWB vs BLE for RTLS
The most common RTLS short-list question. The honest answer is almost always “how accurate do you truly need to be?” — because that one decision drives cost more than anything else.
The short version
UWB delivers 10–30 cm accuracy at meaningful infrastructure cost — the right call when you must distinguish two assets within a metre or drive a real-time safety decision. BLE 5.x with Angle-of-Arrival gives 1–3 m at a fraction of the anchor density and cost — the sweet spot for mobile equipment, occupancy and ward- or zone-level flow.
How they compare
- Accuracy: UWB 10–30 cm · BLE 1–3 m
- Infrastructure: UWB anchors are denser and pricier; BLE locators are cheaper and sparser
- Tags: both battery-friendly; BLE tags are typically cheaper
- Best for: UWB — precision, safety, process; BLE — room/zone visibility at scale
- Watch-outs: UWB cabling cost often exceeds the radio; BLE AoA needs antenna tuning
How to choose
Pin down the minimum accuracy a real workflow needs — in metres, against a task — before you compare vendors. Teams routinely overpay for sub-metre precision they never use, or buy zone-level and then find it can’t support the use case they actually wanted. Many real programmes combine both: UWB at choke-points, BLE everywhere else.
Frequently asked questions
Is UWB always more accurate than BLE?
Yes, materially — UWB time-of-flight reaches 10–30 cm vs BLE’s 1–3 m. The question is whether your use case needs that precision.
Is BLE cheaper than UWB?
Usually, because locator density is lower and tags are cheaper. But total cost depends on the accuracy and coverage you require.
Can I mix UWB and BLE?
Yes — hybrid stacks are common: UWB at high-value or safety hotspots, BLE for general coverage.
How do I decide?
Start from the required accuracy against a real task, then your environment and budget. Our four-question technology picker gives a fast vendor-neutral steer.