Free Tools / VoIP Quality Estimator
Estimate your call quality (MOS)
Turn latency, jitter and packet loss into an estimated Mean Opinion Score — the standard 1-to-5 measure of how good your calls will actually sound.
Your network measurements
Enter figures from your monitoring, a ping test, or our browser network test.
Round-trip ping ÷ 2. Under ~150 ms one-way is ideal for voice.
Variation in packet timing. Under ~30 ms is comfortable.
Even 1–2% is audible as dropouts. Aim for under 1%.
Estimated call quality (MOS)
4.34 / 4.4
MOS (Mean Opinion Score) rates call quality from 1 (unusable) to about 4.4 (as good as a landline). Toll-quality voice sits around 4.0+.
Underlying network rating (R-factor): 90.
Calls sounding rough?
Jitter and loss usually trace back to the network. Dedicated business fiber and a properly configured connection keep voice clean.
Estimates only, for general guidance. Your actual figures depend on your specific setup — contact Voiswitch for an exact quote. MOS here is a modelled estimate from the ITU-T E-model, not a live measurement of your calls.