Network

Uptime SLA Calculator

Translate SLA percentage targets into allowed downtime windows.

Last validated: 2026-02-14

Uptime SLA Calculator converts SLA percentages into allowed downtime per day, month, and year. It is useful for vendor evaluation, incident reporting, and setting realistic reliability commitments. The tool makes terms like 99.9 or 99.99 concrete in minutes and hours. Use it to align business expectations with engineering targets.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

SLA Inputs

Allowed Downtime

Total allowed downtime: 43m 12s

Seconds: 2592.00

How to use this tool

Enter SLA percentage target.
Run the calculator to view allowed downtime windows.
Use results in contracts, runbooks, or reliability planning.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

Sla percent: 99.9
Period: month
Downtime seconds: 2591.9999999998527
Downtime human: 43m 12s

Expected Outputs

Sla percent: 99.9
Downtime seconds: 2592

Interpretation

Sla percent is 99.9. Use this as a decision input, not as a standalone conclusion.
Downtime seconds is 2591.9999999998527. Use this as a decision input, not as a standalone conclusion.
Confirm unit consistency and operational constraints before applying this result in production or field conditions.

Scenario Compare (A vs B)

Use this to compare two input sets and quantify change in key outputs.

Formula References

IPv4/IPv6 addressing rules and common protocol arithmetic.
DNS/WHOIS/network calls depend on external resolvers and current network state.

Assumptions

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