Bandwidth Calculator
Size your backhaul with confidence. Turn subscriber count, sold plans and contention ratio into the uplink capacity you actually need.
Network Load Parameters
Required Uplink Capacity
- Total Sold Bandwidth
- 25 Gbps
- Guaranteed / User
- 5 Mbps
Assumes peak concurrency matches your contention ratio. Real usage varies by region and time of day.
Shape traffic automatically.
Enforce plan speeds and bill usage straight from your router. Free to start.
Create free accountWhat is ISP Oversubscription?
Oversubscription (or Contention Ratio) is the practice of selling more bandwidth to subscribers than the ISP has available in its core network or upstream connections. This is standard industry practice because not everyone uses their connection at 100% capacity simultaneously.
Recommended Ratios
- 1:1 (Dedicated): Guaranteed bandwidth. Used for DIA (Dedicated Internet Access) and mission-critical business lines.
- 1:10 (Residential): Standard balance for Fiber/GPON networks. Good user experience.
- 1:20 to 1:50 (Budget): Used for lower-cost residential plans, WISP networks with limited backhaul, or bulk Wi-Fi.
