Enter either your ping (RTT) or an estimated one-way latency (leave the other blank) to calculate the missing value.
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One-way Latency (Approx.) Formula
The following formula is commonly used to approximate one-way latency from a measured ping (RTT). This assumes the path is roughly symmetric and that processing/queueing delays are small compared to propagation delay.
L \approx \frac{RTT}{2}Variables:
- L is the estimated one-way latency in milliseconds (ms)
- RTT is the round-trip time (ping) in milliseconds (ms)
To estimate one-way latency, divide the round-trip time (RTT) by 2. This estimate may be inaccurate if the forward and return paths have different delays.
What is Ping (RTT)?
Ping (as reported by common tools like ping) is the round-trip time (RTT): the time it takes for a probe packet to go from your device to a destination and for the reply to come back. It is usually measured in milliseconds (ms). A lower RTT generally indicates a more responsive connection, which is important for real-time applications such as online gaming, video conferencing, and VoIP calls. High RTT can result in lag and delays, affecting performance and user experience.
How to Estimate One-way Latency
The following steps outline how to estimate one-way latency from ping (RTT).
- First, measure the ping (RTT) of a destination in milliseconds (ms) using a tool such as
ping. - Next, if you need an estimate of one-way latency, use the approximation L ≈ RTT / 2 (this assumes roughly symmetric delay).
- Finally, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Ping / Round Trip Time (RTT) = 100 ms
Estimated One-way Latency (L) ≈ RTT / 2 = 100 / 2 = 50 ms