20 tools
Business & Operations Tools
Twenty calculators for running a business: MRR and ARR, unit economics, churn and cohorts, funnels, A/B test sample size and significance, prioritisation, estimates, capacity, SLAs, inventory, commissions and NPS.
About these tools
Every calculator shows its formula and the rounding it uses, so the answer can be checked by hand and defended in a meeting. Inputs stay in your browser - revenue figures, salaries and customer data are never sent anywhere.
The statistics tools are deliberately conservative. They report confidence intervals rather than a single winner, warn about stopping a test early, and say when a sample is too small to support a conclusion.
Popular tasks
All Business & Operations Tools
- SaaS MRR and ARR Calculator Calculate MRR and ARR from customers and plan mix, then build the bridge from new, expansion, contraction and churned MRR, with one-time fees excluded and the working downloadable.
- SaaS Unit Economics Calculator Work out CAC, ARPA, gross-margin-adjusted LTV, LTV:CAC and payback months from your inputs, with every formula shown and a sensitivity table for churn and margin.
- Churn Revenue Impact Calculator Calculate logo and revenue churn, gross and net revenue retention, and project the monthly and annual revenue a churn rate costs you under different scenarios.
- Cohort Retention Analyzer Import customer activity or a cohort table, build logo and revenue retention by cohort, read it as a heatmap, and get weighted averages and exports - all in your browser.
- Funnel Conversion Analyzer Enter counts for each funnel step, compare segments, set targets, and see conversion and drop-off at every step plus what fixing the worst step would be worth.
- A/B Test Sample Size Calculator Calculate the visitors each variant needs from baseline conversion, minimum detectable effect, significance and power, with multiple variants, unequal allocation and the formula shown.
- A/B Test Significance Calculator Test whether a difference in conversion rates or means is statistically significant, with the confidence interval, effect size, achieved power and a warning before calling a winner.
- RICE Prioritization Calculator Score and rank a backlog with RICE, see the formula for every item, normalise reach, and import or export the list as CSV.
- ICE Scoring Calculator Score ideas with ICE on the scale you choose, average or multiply, rank them, and see how sensitive the ranking is to each score.
- PERT Project Estimator Turn optimistic, most likely and pessimistic estimates into expected durations, standard deviations and confidence ranges for single tasks and whole projects.
- Staffing Capacity Planner Plan team capacity from roles, workdays, holidays, allocation and utilisation targets, compare it with demand by skill, and see the gap - without storing anyone's data.
- Meeting Cost Calculator Calculate what a meeting costs from attendee groups and pay basis, including preparation and follow-up, and what a recurring meeting costs over a year.
- SLA Uptime Calculator Convert an uptime target into allowed downtime per day, week, month, quarter and year, exclude maintenance, and see how much error budget observed downtime has used.
- Operational Incident Cost Calculator Estimate what an outage costs from duration, affected users, revenue rate, response effort, SLA credits and recovery costs, as a low, expected and high range.
- Inventory Reorder Point Calculator Calculate the stock level at which to reorder from daily demand, lead time and a service-level safety stock, with the units carried through every step.
- Safety Stock Calculator Compare safety stock from several methods - demand variability, lead-time variability, both combined, and max-minus-average - and see how service level changes the answer.
- Economic Order Quantity Calculator Calculate EOQ from annual demand, ordering cost and holding cost, and compare total annual cost at the EOQ against the quantities you actually order.
- Sales Commission Plan Calculator Model a commission plan with tiers, quota attainment, accelerators, thresholds, caps and draws, see which rule applied in which order, and compare payouts across scenarios.
- Survey Response Analyzer Load survey responses from CSV and get answer distributions, cross-tabs, multi-select counts and open-text term frequencies, with sample size and missing answers disclosed.
- NPS and CSAT Dashboard Builder Calculate NPS, CSAT and CES from raw responses, split them by segment with confidence intervals, track trends, and export a dashboard as HTML or CSV.
Newly added
Related A2Z.Tools utilities
Other tool collections
Rate this tool
Was this tool useful? Your feedback helps us improve it.
No ratings yet — be the first to rate this tool.