Routing
Calculated locally
OSPF Cost Calculator
Calculate OSPF cost from reference and interface bandwidth with high-speed collapse warnings.
Learn before you deploy
Reference PacketToolbox learning content related to this workflow.
Tool input
Use the fields below and run the calculation or generation locally.
Results
Review output and validation notes before production use.
How it works
Set reference bandwidth and interface speed to calculate integer OSPF cost.
All processing runs in-browser with no external API dependency.
Practical example
Example: 100000 Mbps reference and 1000 Mbps interface yields cost 100.
Related tools
Use these together for complete design and troubleshooting workflows.
- IPv4 Subnet Calculator for subnet boundary and wildcard checks.
- VLSM Planner for hierarchical IPv4 allocation.
- Route Summarization Calculator for clean route advertisement planning.
- Cisco ACL Builder for policy-generation workflows.