Example 1
- 99.9%
525.6 min (8.76 h)
How much year downtime at 99.9%? 525.6 min (8.76 h). A percent, not an SLA.
Uptime and downtime
Type a percent. 99.9% give 525.6 min (8.76 h). 99.99% give 52.6 min (0.88 h). 99% give 5256.0 min (87.60 h). The result is year downtime, not an SLA from a monitor.
525600 × (100-pct)/100 minutes per year. Not a measured SLA. SLO minutes sit on error budget.
Results
Enter data and click Calculate.
How it works
Uptime and downtime in this calculator counts year minutes from a percent. 99.9% give 525.6 min (8.76 h). 99.99% give 52.6 min (0.88 h). 99% give 5256.0 min (87.60 h). The result is year downtime, not a month and not a live SLA.
Field uptime-pct is the percent. 525600 × 0.001 = 525.6. 525600 × 0.0001 = 52.56, shown as 52.6 min (0.88 h). 525600 × 0.01 = 5256.0. The formula does not read a monitor.
525.6 min does not come from Pingdom. 52.6 min is not a ticket. 5256.0 min does not know a change window. You type the percent.
Error budget next door counts minutes from an SLO. MTTR divides repair hours. Here 99.9% stays 525.6 min (8.76 h), the year from a percent.
Type 99.9, then Calculate. The year result is 525.6 min (8.76 h). A comma in 99,9 works. Above 100 breaks the percent. This is not a live SLA.
99.9% give 525.6 min (8.76 h). 99.99% give 52.6 min (0.88 h). 99% give 5256.0 min (87.60 h). Another percent changes 525.6.
Formula
min/year = 525600 × (100 - pct) / 100. The result is the year. A percent, not a measured SLA.
How to use
- Type 99.9 in the percent field.
- Click Calculate. The year is 525.6 min (8.76 h).
- 99.99% give 52.6 min (0.88 h). 99% give 5256.0 min (87.60 h).
- A percent, not a measured SLA.
- SLO minutes sit on error budget.
99.9% = 525.6 min (8.76 h)
A year from a percent. 99.9% give 525.6 min (8.76 h). Not a measured SLA.
- Uptime
- Field uptime-pct. 99.9 leaves 525.6 min (8.76 h). Not Pingdom.
- downtime
- The year primary. 99.99% give 52.6 min (0.88 h). 99% give 5256.0.
- year
- 525600 minutes. 525.6 min (8.76 h) at 99.9%. Not a ticket.
Examples
Example 2
- 99.99%
52.6 min (0.88 h)
What about 99.99%? 52.6 min (0.88 h).
Example 3
- 99%
5256.0 min (87.60 h)
What about 99%? 5256.0 min (87.60 h).
Related calculators
Common questions
How much year downtime at 99.9%?
525.6 min (8.76 h). 525600 × 0.001. Not an SLA from a monitor.
What about 99.99%?
52.6 min (0.88 h).
What about 99%?
5256.0 min (87.60 h).
Is this a measured SLA?
No. One percent field. The calculator does not read Pingdom.
Is the result a month?
No. The result is the year: 525.6 min (8.76 h). The month sits beside it.
Does a comma in 99,9 work?
Yes. 99,9 and 99.9 give 525.6 min (8.76 h).
Where does 525600 come from?
365 × 24 × 60. A calendar year in minutes, not a leap year.
Where do I count an error budget?
On error budget. Here 525.6 min (8.76 h) stays.
Does 100% count?
Yes as 0 min. Above 100 or a blank field stops.
Knowledge sources
The calculator counts bits, bytes or throughput from your numbers. Below are SI and bit definitions (NIST).
Page updated in 2026.