Capital Efficiency & Growth Modeler · Seed / Series A–B
Modeling…
SaaS Magic Number——Net new ARR / prior-quarter S&MBurn Multiple——Net burn / net new ARRNRR · 12-mo—ModeledExpansion net of churn & contractionGRR · 12-mo—ModeledRetention excluding expansionQuick Ratio——Growth vs. leakage · healthy > 4.0LTV : CAC—GP LTVFloor 3.0x · cohort Weibull/log-normalCAC Payback——Months to recover blended CACRunway / Trough——Months to default · cash trough depth
VC diligence desk
Four hard gates · Seed / Series A
Cash path & trough
Maximum cumulative deficit before unit payback
Path to target
Saturation-aware funnel
Cohort decay
S(t) · GRR · NRR
Logo survival GRR NRR
Monthly ledger
Forward simulation · cash, burn, and net-new MRR
Mo
Leads
New logos
Ending MRR
New MRR
Expansion
Churn + contraction
S&M
Net burn
Cash
Quick
How to Use This Calculator
This tool helps you estimate the effort needed to reach a financial goal based on your product price and conversion rates. Fill in the inputs on the left, and see the required path on the right.
Left Panel: Inputs
Target ($): Your main financial goal.
Select 'Total Amount' if it's a one-time target (e.g., total revenue for a project).
Select 'MRR' if it's a Monthly Recurring Revenue target (e.g., for subscriptions).
Select 'ARR' if it's an Annual Recurring Revenue target.
Enter the corresponding value in the input box below.
Item Price ($): The price of one unit of your product/service. For MRR/ARR, this is typically the monthly/recurring price per customer.
Initial Interest Rate (%): Out of the people you 'Reach', what percentage show initial interest (e.g., click an ad, sign up for free, install an app)? Example: 20 clicks per 1000 views = 2%.
Customer Conversion Rate (%): Out of the people who showed initial interest ('Free Users'), what percentage become paying customers?
Calculate Monthly Churn?: Turn ON if you have a subscription/recurring model.
Calculate Expenses?: Turn ON to factor in costs. Adjust Plan for Expenses? increases the path so the original target is met after expenses.
Show Advanced SaaS Metrics?: LTV, LTV/CAC, and CAC payback (requires CAC and churn for LTV).
Right Panel: Results
Your Path (Calculations): Goal, strategy (reach & free users), and outcome (customers needed).
Your Path (Flow): Reach → Free Users → Customers → Target Met, plus Net Result when expenses are on.
Turn off Minimal mode in the header for the institutional capital-efficiency modeler.
This modeler replaces napkin funnel math with the same identities a Series A diligence associate will rebuild in a spreadsheet. All curves are computed client-side. Nothing leaves the browser.
SaaS Magic Number
Magic Number = Net New ARRQ / S&MQ−1 = 12 × (MRRt − MRRt−3) / Σ S&Mt−5…t−3
Grades: < 0.75 Poor · 0.75–1.0 Efficient · > 1.0 High Growth. Headline figure uses the last complete quarter in the horizon.
Burn Multiple
Burn Multiple = Net BurnQ / Net New ARRQ
Bessemer bands: < 1.0 Amazing · 1.0–1.5 Great · 1.5–2.0 Good · > 2.0 flagged.
NRR and GRR
Logo survival S(t) comes from Weibull or a two-mass log-normal mixture. Dollars then layer expansion e and contraction c: