How do you calculate edge gateway coverage?

Divide the number of assets connected through edge gateways by the total in-scope assets and multiply by 100. With 42 of 60 assets connected, coverage is 42 / 60 x 100 = 70%.

What is a good edge gateway coverage percentage?

Mature IIoT programs aim for 90% or higher of in-scope assets so analytics have near-complete data. At 70% coverage against a 90% target the example sits 20 points short, meaning roughly one in five scoped assets is still dark.

What does the coverage gap to target mean?

It is the target minus actual coverage in percentage points. Here 90% target minus 70% actual is a 20-point gap, so you still need to connect 18 more assets (30% of 60) to reach target.

Does coverage mean the data is good?

No. Coverage only confirms an asset is connected through a gateway, not that every tag is mapped, the sample rate is right, or the stream is reaching your historian. Pair it with a data-quality or tag-coverage check.

Why use in-scope assets instead of all plant assets?

Many assets, such as manual stations or legacy equipment slated for retirement, are intentionally excluded from an edge program. Measuring against in-scope assets keeps the metric honest and avoids penalizing the rollout for equipment it was never meant to cover.

How is this different from machine connectivity rate?

Edge gateway coverage measures whether assets are connected through gateways at all, a rollout-completeness view, while machine connectivity rate typically measures whether already-connected machines are reporting live in the latest polling window, an uptime view.

IIoT, SCADA & Edge Connectivity calculator

Edge Gateway Coverage Calculator

Edge gateway coverage is the percentage of in-scope plant assets whose data is being collected through edge gateways, the field devices that bridge machine protocols to your IIoT or cloud platform. OT architects and digital transformation leads track it to measure how far an edge data-collection rollout has actually progressed against the assets it was scoped to cover. It is the single clearest indicator of whether your edge infrastructure is delivering the data foundation that analytics, monitoring, and predictive maintenance depend on. The companion gap-to-target tells you how many percentage points of rollout remain before you hit the program milestone.

What this calculator does

Estimate the share of plant assets covered by deployed edge gateways from the count of assets connected through edge gateways, total assets in scope, and the program coverage target.
Use it when an automation lead is reporting IIoT rollout progress to operations and needs a clean percent-coverage number plus the gap to the target on the rollout dashboard.
It computes the share of in-scope assets connected through edge gateways and the point gap between that coverage and your target.

Formula used

Edge gateway coverage = connected assets ÷ total in-scope assets × 100
Coverage gap to target = target coverage - actual coverage (negative gap means below target)

Inputs explained

Assets connected through edge gateways:
Total in-scope assets:
Edge gateway coverage target:

How to use the result

Use it in IIoT rollout reviews to report progress and quantify the remaining connectivity gap against a milestone.
It counts an asset as covered if a gateway connects it, not whether the data is complete, high-quality, or actually flowing to consumers downstream.

Current U.S. benchmarks

Global copper trades at $13,484 per tonne (IMF via FRED, May 2026), up 41.5% in a year, and U.S. industrial electricity averages 8.66 cents per kWh. Both feed electrified-hardware unit economics.

Common questions

How do you calculate edge gateway coverage? Divide the number of assets connected through edge gateways by the total in-scope assets and multiply by 100. With 42 of 60 assets connected, coverage is 42 / 60 x 100 = 70%.
What is a good edge gateway coverage percentage? Mature IIoT programs aim for 90% or higher of in-scope assets so analytics have near-complete data. At 70% coverage against a 90% target the example sits 20 points short, meaning roughly one in five scoped assets is still dark.
What does the coverage gap to target mean? It is the target minus actual coverage in percentage points. Here 90% target minus 70% actual is a 20-point gap, so you still need to connect 18 more assets (30% of 60) to reach target.
Does coverage mean the data is good? No. Coverage only confirms an asset is connected through a gateway, not that every tag is mapped, the sample rate is right, or the stream is reaching your historian. Pair it with a data-quality or tag-coverage check.
Why use in-scope assets instead of all plant assets? Many assets, such as manual stations or legacy equipment slated for retirement, are intentionally excluded from an edge program. Measuring against in-scope assets keeps the metric honest and avoids penalizing the rollout for equipment it was never meant to cover.

Last reviewed 2026-05-12.