The number of interconnected devices — known as the Internet of Things (IoT) — is projected to nearly quintuple worldwide between 2015 and 2025. The IoT connects TVs, fitness bands, appliances and other items to the Web and sometimes to each other. Note that figures for 2017 to 2025 are projections.

Source: “Internet of Things (IoT) connected devices installed base worldwide from 2015 to 2025 (in billions),” Statista, November 2016, https://tinyurl.com/j3t9t2w

Data for the graphic are as follows:

Year Number of Connected Devices, in billions
2015 15.41
2016 17.68
2017 20.35
2018 23.14
2019 26.66
2020 30.73
2021 35.82
2022 42.62
2023 51.11
2024 62.12
2025 75.44

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