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Internet Speed Requirements Calculator
Calculate the exact download and upload speeds your business needs based on team size, usage patterns, video conferencing, VoIP, and cloud applications.
Enter Your Details
Percentage of users on video calls at the same time (e.g. 20 = 20%)
Number of staff using internet-based phone systems
Staff connecting via VPN or remote desktop from outside the office
Recommended Speeds by Team Size & Usage
| Team Size | Office Work | Cloud-Heavy | Video-Heavy | Data-Heavy |
|---|---|---|---|---|
| 1–5 | 20 Mbps | 50 Mbps | 75 Mbps | 100 Mbps |
| 6–15 | 50 Mbps | 100 Mbps | 200 Mbps | 300 Mbps |
| 16–30 | 100 Mbps | 200 Mbps | 400 Mbps | 500 Mbps |
| 31–50 | 150 Mbps | 350 Mbps | 600 Mbps | 800 Mbps |
| 51–100 | 300 Mbps | 600 Mbps | 900 Mbps | Leased Line |
| 100+ | 500 Mbps | Leased Line | Leased Line | Leased Line |
Download speed recommendations including 30% headroom. Upload needs vary significantly based on video conferencing and cloud sync usage. Talk to Cloudswitched for a tailored speed assessment.
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Frequently asked questions
As a rough guide, allow 5-10Mbps download per user for general browsing and cloud apps, rising to 10-25Mbps per user if video calls and large file transfers are frequent. A 20-person office doing regular video conferencing typically needs at least 100-150Mbps download and 20-30Mbps upload to avoid slowdowns at peak times.
Video conferencing typically needs 3-5Mbps upload per concurrent user for HD quality, so a business regularly hosting 5-10 simultaneous calls should budget for at least 30-50Mbps upload. This is why upload-heavy businesses often move from FTTC, which has limited upload speeds, to FTTP or a leased line.
Advertised speeds are shared across everyone in your office, and cloud backups, video calls, and VoIP all compete for the same bandwidth simultaneously. This calculator adds up your actual usage — users, applications, and concurrent video or voice traffic — to show the realistic bandwidth you need rather than just a headline speed figure.
A single VoIP call typically uses 85-100kbps of bandwidth in each direction, so 10 concurrent calls need roughly 1Mbps dedicated to voice traffic. It sounds small, but without Quality of Service (QoS) configuration, VoIP can still suffer quality issues if other traffic like backups or video saturates the connection.