Tools that compound
51 free calculators, simulators and AI copilots for DTC, SaaS and growth operators. No login, no email gate — just the math you needed yesterday.
Finance & Profitability
Numbers that tell you if a business actually works — unit economics, breakeven, runway and the levers that move them.
Ecom OS Profitability Calculator
Simulate how every cost flows through to net profit — the operating system for your P&L.
OpenProfit Margin Calculator
Gross, operating and net margin — measured the right way.
OpenNet Profit Calculator
Walk revenue down to the line that actually matters.
OpenBreak-Even Calculator
Units and revenue needed to cover fixed costs — the floor every plan needs to clear.
OpenCash Flow Calculator
Monthly cash in, cash out, and how many months you have left.
OpenBurn Rate Calculator
Gross and net burn, plus the months between now and zero cash.
OpenARR Calculator
MRR → ARR, with churn baked in and growth projected forward.
OpenIRR Calculator
Internal rate of return for a cashflow series — the version finance teams actually use.
OpenEnterprise Value Calculator
EV from EBITDA, revenue or SDE multiples — calibrated to typical bands.
OpenDilution Calculator
How much of the company you actually own after the next round.
OpenRule of 40 Calculator
Growth + profit margin should clear 40 — the SaaS sanity check.
OpenDTC Unit Economics Simulator
Per-order, per-cohort and per-channel economics — stacked.
OpenAmazon FBA Calculator
Referral, FBA, returns and PPC — what actually lands after Amazon.
OpenShopify Fee Calculator
Plan + transactions + payments — the real cost of Shopify at any volume.
OpenInventory Turnover Calculator
Turnover ratio, days outstanding, and the cash locked in inventory.
OpenMarketing & Growth
From a single ROAS calculation to a full media-mix simulator — work back from your goals to the budget that gets you there.
ROAS Calculator
ROAS, break-even threshold, and profit — for any campaign, in seconds.
OpenBreak-Even ROAS Calculator
The lowest ROAS at which a campaign stops costing you money.
OpenCPC Calculator
Cost per click and the volume you get for any budget.
OpenCPM Calculator
Cost per thousand impressions, plus reach by budget.
OpenMER & POAS Calculator
MER and POAS — the blended metrics that survive iOS, MMM and reality.
OpenCAC Calculator
Blended and paid CAC, channel by channel.
OpenCAC Payback Calculator
Months from acquisition to recovering the cost from gross margin.
OpenLTV Calculator
Lifetime value, both predictive and historical, with retention curves.
OpenLTV:CAC Ratio Calculator
LTV ÷ CAC — the single ratio investors actually care about.
OpenAd Budget Planner
Work back from the revenue goal to the daily budget that hits it.
OpenMedia Mix Allocator
Allocate spend across channels with diminishing returns baked in.
OpenInfluencer Budget Planner
Plan influencer partnerships with ROI expectations baked in.
OpenEmail Marketing ROI Calculator
Revenue per subscriber, optimal frequency, and the list size you need.
OpenUTM Builder
Clean, consistent UTM-tagged URLs with presets and bulk generation.
OpenLead Gen Funnel Simulator
Model the whole funnel — channel mix, conversion math, CAC by source.
OpenAds Competitor Analysis
Pull, group, tag and score competitor ads to find category white space.
OpenAnalytics & Intelligence
Read what your tests, customers and competitors are telling you — A/B significance, NPS, pricing elasticity, creative impact.
A/B Test Calculator
Sample size, significance and confidence intervals — the rigorous version.
OpenConversion Rate Calculator
Conversion rate, drop-off and the math behind your revenue goal.
OpenChurn Calculator
Monthly, annual and revenue churn — the slow leak that compounds.
OpenNPS Calculator
NPS with intervals and segment breakdown.
OpenEngagement Rate Calculator
Engagement rate, normalised by reach or follower count, across platforms.
OpenPrice Elasticity Calculator
PED from two data points — and the price that maximises revenue or profit.
OpenPricing Psychology Tool
Van Westendorp PSM — the price range customers will tolerate.
OpenCreative Calculator
How many creatives you need and how often to refresh, by spend level.
OpenLanding Page ROI Calculator
Revenue uplift from a CR improvement, at your traffic and AOV.
OpenB2B Pipeline Calculator
Coverage, conversion by stage, revenue per rep — the B2B math.
OpenCustomer Intelligence
Upload reviews. AI surfaces motivations, friction and customer language.
Coming soonAI Tools
Generative copilots that draft hooks, headlines and personas, plus auditors that score landing pages and growth motions.
AI Ad Copy Generator
Hook, body and CTA combinations for any product and platform.
OpenAI Headline Analyzer
Score headlines on clarity, emotion, specificity — and get a stronger rewrite.
OpenAI Hook Generator
Stop-the-scroll first lines, multiple framings, ranked.
OpenAI UGC Analyzer
Score UGC scripts on hook, pain-point and conversion path.
Coming soonAI Buyer Persona Generator
Sharp personas with JTBD, objections and channels — from a single brief.
OpenAI Email Subject Line Tester
Score and rewrite subject lines for open rate, with predicted lift.
OpenAI Growth Audit Scorecard
AI audit across acquisition, retention, monetisation — with a prioritised plan.
OpenAI Marketing ROI Dashboard
ROI diagnosis across channels — and the levers that would move the needle.
OpenAI Landing Page Analyzer
URL in. Clarity, value prop, CTA and risk-reversal scored, then rewritten.
Coming soon