What did that downtime
actually cost you?
Downtime minutes become an uptime percentage, lost watch hours, and days added to your goal.
An uptime percentage is a comfortable way to describe an outage. Watch hours lost is the uncomfortable one, and it is the number that actually affects your channel.
Add up every outage in the period.
Intended coverage for this period: 720 hours.
Uptime
99.792%
Good
Watch hours lost
15.0
gone, not deferred
Hours actually live
718.5
Downtime
1 hr 30 min
Days added to your goal
0.06
90 minutes of downtime across 30 days is 99.792% uptime. At 10 average concurrent viewers that cost you about 15.0 watch hours — roughly 0.06 extra days of streaming to make it back.
Watch hours earned in this period
7,185
at the viewer number you entered
What each tier actually allows
| Uptime | Downtime allowed | In minutes | Watch hours lost |
|---|---|---|---|
| 100% | 0 sec | 0.0 | 0.0 |
| 99.9% | 43 min | 43.2 | 7.2 |
| 99% | 7 hr 12 min | 432.0 | 72.0 |
| 95% | 1 day 12 hr | 2,160.0 | 360.0 |
We deliberately publish no uptime percentage for our own service here. Measure yours with this tool instead — that number you can actually verify.
How this is calculated
Uptime percentage
Actual hours live ÷ intended hours × 100. Intended hours is your hours per day multiplied by the days in the period, so a 24/7 stream over 30 days intends 720 hours.
Watch hours lost
Downtime hours × your average concurrent viewers. If ten people would have been watching during a three-hour outage, that is thirty watch hours that never existed — and they do not come back when the stream returns.
Days added to your goal
The lost hours divided by what you earn in a day. It turns an abstract outage into the concrete delay it added to a watch-hours target.
The benchmark table
Uptime tiers sound similar and are not. Over 30 days of 24/7 streaming, 99.9% is about 43 minutes of downtime while 99% is over 7 hours — the same-looking numbers differ by an order of magnitude.
Questions about this tool
What uptime should I expect from a 24/7 stream?
Rather than trust anyone's advertised figure, measure it. Note every outage for a month, put the total minutes in here, and you will have your own number — which is the only one that describes your channel.
Why do lost watch hours matter more than the percentage?
Because watch hours are what the Partner Programme counts. "99% uptime" sounds excellent right up until you convert it into the seven hours of coverage and the watch hours attached to them.
Does a stream that restarts automatically still lose watch hours?
Yes, but far fewer. The loss is the length of the gap, so recovery in under a minute costs a fraction of what a stream sitting dead until morning costs. That difference is the entire argument for automatic restart.
Do I lose my viewers when a stream restarts?
A restart creates a new watch page, so anyone watching is disconnected and has to find the new stream. This is why the gap length matters less than whether the stream comes back at all.
What this tool cannot tell you
Every calculator on the internet hides its assumptions. Here are ours, in the open.
This measures the downtime you tell it about. Short drops nobody noticed will not be in your figure, so the real number is usually a little worse than the one you enter.
Lost watch hours assume the same average concurrent viewers you normally get. An outage at 3 a.m. costs less than the same outage at peak, and this calculation does not know which one happened.
A restart also costs you things this tool cannot count: a new watch page, lost chat, and viewers who do not come back when a stream they had open dies.
We publish no uptime figure for our own service on this page. We would rather give you the tool to measure yours than quote a percentage you have no way to verify.
Nothing here is a service-level commitment. It is arithmetic on numbers you supply.
Next steps
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Watch Hours Calculator
See the date you would reach 4,000 hours at your current viewer numbers.
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Cloud vs PC Cost Calculator
Compare your electricity bill against a cloud slot before you leave a machine on all month.
Guide
24/7 Live Stream Auto-Restart: How Recovery Should Work
A longer read on the same problem, with the steps this tool skips.
Put your channel live — and leave it live.
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