Engineering Tools
A curated set of 32 free browser-based engineering calculators across SRE, FinOps, Kubernetes, and security. Each one is hand-verified for math correctness. Calculations run locally in your browser. No account required.
Application Security
Credential Rotation Gap Calculator
Estimate the backlog created when actual credential rotation lags written policy because each rotation wave carries real operating cost.
Feature Flag Strategy Selector
Pick a feature flag strategy from blast radius, rollback urgency, audit requirement, and dependency complexity.
MFA Adoption Benchmark
Place your organization's MFA adoption rate on the Okta Businesses at Work distribution.
Password Entropy Calculator
Place a password's entropy on the distribution of real-world leaked credentials.
Secrets Exposure Risk Calculator
Quantify credential exposure risk from secret count, rotation age, and access breadth.
Secrets Storage Selector
Pick the right secret storage backend from sensitivity level, access pattern, compliance regime, and rotation cadence.
CI/CD
CI Pipeline Strategy Selector
Pick a CI pipeline topology from team size, service count, deployment frequency, and repository structure.
Change Failure Rate Benchmark
Place your team's change failure rate on the DORA performance distribution.
Deployment Frequency Benchmark
Place your team's deployment frequency on the DORA distribution.
Rollback Strategy Selector
Pick a rollback strategy from deployment model, change category, state dependence, and traffic profile.
Containers
Cost & FinOps
Cloud Waste Benchmark Calculator
Place your cloud waste on the Flexera distribution.
Cloud Waste Calculator
Estimate monthly cloud waste from idle resources, oversized instances, and unattached volumes.
Rightsizing Savings Calculator
Estimate realistic monthly savings from a rightsizing program.
Data Engineering
Databases
Connection Pool Calculator
Size a Postgres connection pool from application instance count, per-instance QPS, query duration, and max_connections budget.
Postgres Partition Strategy Calculator
Decision-tree recommendation from table size, retention, access pattern, and write distribution to a Postgres partition strategy.
Infrastructure
Cloud Region Selector
Pick a region strategy from latency sensitivity, data residency, customer geography, and failover posture.
NAT Gateway Sizing Calculator
Size a NAT gateway from concurrent connections, new connections per second, average duration, and burst factor.
Rate Limiting Strategy Selector
Pick a rate limiting algorithm from traffic pattern, fairness scope, enforcement point, and false-rejection cost.
Kubernetes
Cluster Capacity Calculator
Size a Kubernetes cluster from pod count, per-pod resource requests, and HA headroom.
Ingress Controller Selector
Pick a Kubernetes ingress strategy from cluster size, traffic shape, TLS policy, and multi-tenant needs.
Observability
Alert Fatigue Calculator
Measure per-engineer daily alert load, actionable-to-noise ratio, and team hours burned from alert volume, actionable rate, rotation size...
Log Retention Sizing Calculator
Size log retention storage from daily ingest rate, retention days, replication factor, and index overhead.
Queue Backlog Growth Calculator
Compute drain time and growth rate from current queue depth, arrival rate, processing rate, and measurement window.
Synthetic Check Sizing Calculator
Size a synthetic monitoring fleet from endpoint count, check interval, regions, and retries.
SRE
Error Budget Calculator
Compute SLO error budget, burn rate, and projected window-end status.
Incident Frequency Benchmark
Place your team's incidents-per-engineer rate on the Pagerduty State of Digital Operations distribution.
MTTR Calculator
Compute mean time to resolution from incident counts and detect/resolve durations.
Retry Storm Impact Calculator
Compute retry amplification factor and effective load from baseline rate, retry count, backoff model, and failure concurrency.
SLO Target Benchmark
Place an availability SLO target against published SaaS and infrastructure benchmark bands by customer impact and service criticality.
Toil Calculator
Estimate the annual cost of SRE toil and the break-even point for automating it.