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VoIP Bandwidth Calculator

Calculate bandwidth requirements for Voice over IP calls with codec and overhead options.

The maximum number of simultaneous VoIP calls. Each call requires a separate bandwidth allocation in both directions.
G.711: 64 Kbps (highest quality, uncompressed). G.729: 8 Kbps (good quality, compressed). G.722: 64 Kbps (wideband HD). Opus: 24 Kbps (adaptive, modern).
How often voice samples are packetized. 20ms is standard. Shorter intervals = more packets = more overhead. Longer = more latency.
ms
Ethernet adds 18 bytes L2 header. MPLS adds 4 bytes per label (typically 1-2 labels). This affects total per-packet overhead.

VoIP Bandwidth Results

Codec Bitrate-Kbps
Payload per Packet-bytes
Packets per Second-pps
Header Overhead per Packet-bytes
Bandwidth per Call (with headers)-Kbps
Bandwidth per Call (compressed RTP, cRTP)-Kbps
Total Bandwidth (all calls, with headers)-Mbps
Total Bandwidth (all calls, cRTP)-Mbps
References: ITU-T G.711, G.729, G.722 codec standards. RFC 3550 (RTP). RFC 2508 (cRTP header compression). IP(20)+UDP(8)+RTP(12)=40 bytes header per packet.