Traffic Input Form
Example Data Table
| Scenario | Packets | Time | Avg Size | Overhead | Link | Packet Rate | Utilization |
|---|---|---|---|---|---|---|---|
| Access switch uplink | 250,000 | 60 s | 512 bytes | 38 bytes | 100 Mbps | 4,166.67 pps | 18.33% |
| Core burst sample | 900,000 | 30 s | 1,024 bytes | 42 bytes | 1 Gbps | 30,000.00 pps | 25.58% |
| Edge WAN trace | 72,000 | 5 min | 256 bytes | 28 bytes | 20 Mbps | 240.00 pps | 2.73% |
Formula Used
This calculator converts observation values into packets per second, payload throughput, wire throughput, and utilization. It also estimates burst rate and line-rate capacity.
How to Use This Calculator
- Enter the total observed packets counted during your capture or monitoring interval.
- Input the observation duration and select the matching time unit.
- Provide the average packet size and the correct size unit.
- Add estimated per-packet overhead to reflect headers, tags, or encapsulation.
- Enter link speed to compare measured traffic against available capacity.
- Adjust payload efficiency if only a portion of each packet carries useful data.
- Fill burst fields to estimate temporary spikes and short-window stress.
- Press calculate to display results above the form, then export CSV or PDF if needed.
Frequently Asked Questions
1. What does packet rate mean?
Packet rate shows how many packets cross a link each second. It helps measure forwarding load, device stress, traffic bursts, and link behavior beyond raw bandwidth numbers.
2. Why is packet rate different from throughput?
Throughput measures bits or bytes transferred, while packet rate counts packet events. Small packets can create high packet rates with modest throughput, stressing CPUs and forwarding tables.
3. Why should I include overhead bytes?
Overhead accounts for headers, tags, encapsulation, and framing. Ignoring it can understate wire throughput and utilization, especially on tunneled, tagged, or security-heavy network paths.
4. What is payload efficiency?
Payload efficiency estimates what share of each packet carries useful application data. Lower efficiency means more transport overhead and less effective data delivered per packet.
5. How do burst calculations help?
Burst calculations reveal short-term packet spikes that averages may hide. They are useful for queue sizing, policing checks, jitter analysis, and troubleshooting intermittent congestion.
6. Can I use this for WAN and LAN links?
Yes. The calculator works for access, distribution, core, wireless backhaul, and WAN links as long as your observed traffic, packet size, and link speed inputs are realistic.
7. What does inter-packet gap show?
Inter-packet gap estimates average time between packets. Smaller gaps mean denser traffic arrival and can indicate higher interrupt frequency or processing demand on network equipment.
8. When is line-rate packet capacity important?
Line-rate packet capacity matters when sizing routers, firewalls, switches, or packet-processing software. It shows the theoretical packet ceiling a link can sustain for a given frame size.