Calculator Inputs
The page uses a single-column structure overall. The form below switches between three, two, and one columns across screen sizes.
Example Data Table
| Scenario | Total Systems | Critical Systems | Hourly Loss ($) | Target RTO | Restore Time | Target RPO | Backup Interval | Automation | Replica Coverage |
|---|---|---|---|---|---|---|---|---|---|
| Regional outage | 40 | 12 | 7,700 | 4 hrs | 6 hrs | 30 min | 60 min | 65% | 70% |
| Cloud platform failure | 75 | 20 | 15,500 | 2 hrs | 3.5 hrs | 15 min | 20 min | 82% | 88% |
| Ransomware containment | 55 | 18 | 11,200 | 6 hrs | 9 hrs | 45 min | 90 min | 58% | 62% |
Formula Used
This calculator estimates disaster recovery exposure by combining financial impact, timing objectives, coverage levels, test frequency, staffing depth, and recovery design.
1) Downtime Cost Per Hour
Hourly Revenue Loss + Hourly Productivity Loss + Hourly Penalty Loss
2) Base Outage Cost
Downtime Cost Per Hour × Estimated Restore Time
3) Scenario Adjusted Cost
Base Outage Cost × Incident Profile Multiplier
4) RTO Gap
max(0, Estimated Restore Time − Target RTO)
5) RPO Gap
max(0, Backup Interval − Target RPO)
6) Alignment Scores
RTO Alignment = min((Target RTO ÷ Estimated Restore Time) × 100, 100)
RPO Alignment = min((Target RPO ÷ Backup Interval) × 100, 100)
7) Readiness Score
Weighted score using RTO alignment, RPO alignment, replica coverage, automation, backup success rate, testing frequency, staffing adequacy, and site strategy.
8) Suggested Contingency Reserve
The reserve uses scenario-adjusted cost and increases when timing gaps are larger and readiness is weaker.
How to Use This Calculator
- Enter your total environment size and how many systems are business critical.
- Add hourly loss values for revenue, productivity, and penalties or contractual exposure.
- Enter target RTO and RPO values from your continuity or recovery plan.
- Provide realistic restore time, backup interval, automation, replication, and backup success values.
- Select your recovery site strategy and the likely incident profile.
- Submit the form to review readiness, timing gaps, projected impact, reserve needs, and the Plotly comparison graph.
Frequently Asked Questions
1. What does this calculator measure?
It estimates disaster recovery readiness, downtime cost, timing gaps, protected workload coverage, and a suggested contingency reserve for a defined outage scenario.
2. What is the difference between RTO and RPO?
RTO is the target time to restore service. RPO is the acceptable data-loss window measured from the most recent recoverable backup or replica point.
3. Why does the calculator ask for hourly loss values?
Financial loss values convert technical downtime into business impact, helping teams justify recovery investments, recovery design choices, and testing priorities.
4. How is the readiness score useful?
The score summarizes several recovery controls into one benchmark, making it easier to compare environments, identify weak areas, and prioritize improvements.
5. Does a higher automation percentage always improve results?
Usually yes, but only when automation is reliable, documented, and tested. Poor automation can create failure points during real recovery events.
6. What does replica coverage mean here?
Replica coverage estimates how much of your critical estate has replicated copies or alternate recovery targets available during a disruptive event.
7. Why is annual testing included?
Frequent testing improves confidence, exposes hidden dependencies, validates documentation, and usually reduces restore uncertainty during a real incident.
8. Can this replace a full business impact analysis?
No. It is a planning calculator, not a full assessment. Use it alongside business impact analysis, architecture review, tabletop exercises, and recovery testing.