Steam estimated download time wrong

1. Why is my Steam download time wrong?
2. Are estimated download times accurate?
3. Is Steam time remaining accurate?

Why is my Steam download time wrong?

Keep in mind that sometimes, wrong estimations can be a result of a busy or unstable Internet Connection. If your connection is busy or unstable, Steam will probably miscalculate the ETA because the download speed is varying.

Are estimated download times accurate?

Time estimates on downloads can be pretty accurate. Given a server with an available bandwidth and a client with available bandwidth, a steady download rate can be achieved. A steady rate means predictably in terms of timing. How can I improve my app downloads in a short amount of time?

Is Steam time remaining accurate?

The time remaining will only be accurate if your download speed stays constant. However, this isn't always the case so sometimes you'll see your estimated time remaining fluctuate a fair bit.