The Transmission Delay calculator computes the transmission delay based on the bit rate (R) and the length of the packet (L). NOTE: New unit defaults. Packet lengths have a default of bytes and transmission speeds are in Megabits per second (Mbit/s). You may choose other units via pull-down menu.
INSTRUCTIONS: Choose units and enter the following:
- (L) Length of Data Packet
- (R) Transmission Speed (Data Transfer Rate)
Transmission Delay (TD): The calculator returns the delay in milliseconds. However, this can be automatically converted to compatible units via the pull-down menu.
Common Transmission Speeds
| Data Rate | Transfer Medium |
| 1.5 Mbit/s | ADSL Lite |
| 1.544 Mbit/s | T1/DS1 |
| 2.048 Mbit/s | E1 / E-carrier |
| 4 Mbit/s | ADSL1 |
| 10 Mbit/s | Ethernet |
| 11 Mbit/s | Wireless 802.11b |
| 24 Mbit/s | ADSL2+ |
| 44.736 Mbit/s | T3/DS3 |
| 54 Mbit/s | Wireless 802.11g |
| 100 Mbit/s | Fast Ethernet |
| 155 Mbit/s | OC3 |
| 600 Mbit/s | Wireless 802.11n |
| 622 Mbit/s | OC12 |
| 1 Gbit/s | Gigabit Ethernet |
| 1.3 Gbit/s | Wireless 802.11ac |
| 2.5 Gbit/s | OC48 |
| 5 Gbit/s | USB 3.0 |
| 9.6 Gbit/s | OC192 |
| 10 Gbit/s | 10 Gig Ethernet, USB 3.1 |
| 40 Gbit/s | Thunderbolt 3 |
| 100 Gbit/s | 100 Gigabit Ethernet |
The Math / Science
The formula for Transmission Delay is:
TD = L/R
where:
- TD is the Transmission Delay
- L is the length of the data packet
- R is the bit rate
Assuming that packets are transmitted in a first-come-first-served manner, as is common in packet-switched networks, our packet can be transmitted only after all the packets that have arrived before it have been transmitted. Denote the length of the packet by L bits, and denote the transmission rate of the link from router A to router B by R bits/sec. For example, for a 10 Mbps Ethernet link, the rate is R = 10 Mbps; for a 100 Mbps Ethernet link, the rate is R = 100 Mbps. The transmission delay is L/R. This is the amount of time required to push (that is, transmit) all of the packet’s bits into the link. Transmission delays are typically on the order of microseconds to milliseconds in practice.
Time Dependent Calculators
- Time required to process an amount of data at a specific data processing rate
- Amount of time required to transfer an amount of data over a different types of networks
- Number of items (unit-less) produced over time
- Length or distance processed (produce or consume) over time
- Area processed (produced, covered or consumed) over time
- Volume processed (produced or consumed) over time
- Weight or mass processed (produced or consumed) over time
- Speedup Factor (aka Amdahl's Law)
- Compute Data Storage Needed
- Network Propagation Delay
Telecommunications Calculators
- Propagation Delay Computes the delay between two routers based on their positions and a transfer rate.
- Nodal Delay: Computes the nodal delay based on the queuing, processing, transmission and propagation delay.
- End to End Delay Computes the end to end delay based on the number of nodes and the processing, transmission, and propagation delay.
- RF Velocity of Propagation: Computes the RF velocity based on the medium permittivity
- Transmission Delay: Computes the delay based on length of packet and transmission rate.
- Data Transfer Time Calculator Computes the time to transfer an amount of data based on the data transfer rate.
- Simplified Propagation Delay: Computes the delay between two router based on the distance and the transfer rate.
- Surge Impedance Loading: Computes the power loading of a transmission line.
- Amdahl's Law: Computes the total system speedup time based on the improvement of one portion.
- Signal-to-Noise Ratio (SNR) calculator: Computes a relative measure of the strength of the received signal (i.e., the information being transmitted) compared to the noise.
- Compute Data Storage Needed: Computes the approximate amount of data storage needed based on a period of time and a data rate.
- Network Propagation Delay Computes the propagation delay based on the positions of two routers and the propagation speed.
- Shannon-Hartley Theorem: Computes the theoretical upper limit data rate of a channel based on the bandwidth, receiver strength and channel noise.
- Cable dB Loss Budget Computes db loss based on length of fiber run and number of connectors.
- Voltage Resolution (Analog to Digital) Computes the Voltage Resolution of a measured analog signal over the nominal range [VL , VH] with a specified number of conversion bits.
- Effective Isotropically Radiated Power (EIRP): Converts an EIRP measured in mw (milliwatt) to the unitless ratio of dBm (ratio of decibel to 1 milli-unit).
- Length of Cable with Sag: Computes the length of cable between pole accounting for the sag.