100 Free SaaS Tools & Calculators
Accurate, transparent, and completely free calculators for SaaS founders and operators. Compute churn, MRR waterfalls, pricing sensitivity, Stripe fee breakdowns, dunning schedules, and FTC Click-to-Cancel compliance in seconds. Every tool computes entirely in your browser with verified formulas and official documentation citations.
Churn & Retention
Calculate customer churn, revenue retention, cohort decay, and retention economics.
Customer Churn Rate Calculator
Calculate monthly customer churn rate and subscriber retention percentage instantly. Formula, worked example and tips for subscription founders.
Revenue Churn Calculator
Calculate gross revenue churn percentage and annualized lost MRR. Free interactive SaaS calculator for subscription founders and finance teams.
Net Revenue Retention (NRR) Calculator
Calculate Net Revenue Retention (NRR) percentage instantly. Model expansion, contraction, and churn to evaluate your SaaS compounding growth engine.
Gross Revenue Retention (GRR) Calculator
Calculate Gross Revenue Retention (GRR) percentage. Measure core customer retention without expansion revenue masking churn. Instant, free calculation.
Customer Retention Rate Calculator
Calculate customer retention rate (CRR) percentage. Track active subscriber longevity and cohort survival over any billing period. Free instant tool.
Cohort Retention Table Builder
Model subscriber cohort decay over 12 months. Visualize retained accounts and calculate subscriber half-life with this free interactive SaaS tool.
Churn Cost Calculator
Calculate the true financial cost of customer churn, including direct lost MRR, replacement CAC, and compounding annual losses. Free interactive tool.
Logo vs Revenue Churn Comparison
Compare logo churn percentage against revenue churn percentage to identify whether enterprise or entry-tier customers are driving subscription attrition.
SaaS Quick Ratio Calculator
Calculate your SaaS Quick Ratio. Measure growth efficiency by comparing new and expansion MRR added against churned and contracted MRR lost.
Retention Curve Plotter
Model your SaaS retention curve and identify your retention plateau. Free interactive browser tool for product founders and growth engineers.
MRR & Revenue
Track monthly recurring revenue, expansion velocity, ARPU, and revenue waterfalls.
MRR Calculator
Calculate Monthly Recurring Revenue (MRR), subscriber counts, and blended ARPU across multiple tiers. Free interactive calculator for SaaS founders.
ARR Calculator
Convert MRR into Annual Recurring Revenue (ARR), quarterly run-rates, and daily recurring velocity. Free instant calculator for SaaS teams.
MRR Growth Rate Calculator
Calculate Month-over-Month (MoM) MRR growth rate, absolute dollar gains, and annualized compound growth rate (CMGR). Free SaaS tool.
Expansion MRR Calculator
Calculate total expansion MRR, expansion rate percentage, and annualized upsell value across tiers, seats, and add-ons. Free interactive tool.
MRR Movements Waterfall Calculator
Break down your monthly recurring revenue waterfall: Starting + New + Expansion - Contraction - Churn = Ending MRR. Free interactive tool.
ARPU (Average Revenue Per User) Calculator
Calculate Average Revenue Per User (ARPU) and Average Revenue Per Account (ARPA) monthly and annually. Free interactive calculator for SaaS founders.
Revenue Run Rate Calculator
Calculate your annualized revenue run-rate from recent monthly or quarterly performance. Instant, free financial modeling tool for founders.
Annual vs Monthly Revenue Converter
Convert monthly subscription pricing to discounted annual plans. Calculate customer savings, upfront cash acceleration, and effective MRR.
Subscription Revenue Forecaster
Forecast compound monthly recurring revenue over 12 months based on growth and churn assumptions. Free interactive SaaS financial projection tool.
MRR Milestone Timeline Calculator
Calculate how many months it will take to reach $10k, $50k, or $100k MRR based on your monthly growth rate. Free interactive SaaS tool.
Pricing & Discounts
Model discount ROI, price increases, seat tiers, and retention offers.
SaaS Discount Impact Calculator
Calculate how much additional customer volume you need to maintain gross revenue when discounting prices. Free interactive SaaS pricing tool.
Annual Plan Discount Calculator
Model annual plan discounts (e.g. 2 months free or 20% off). Calculate customer savings, upfront cash collected, and effective monthly pricing.
Price Increase Churn Simulator
Simulate SaaS price increases. Calculate the maximum tolerable churn percentage before a price hike loses net revenue. Free interactive tool.
Retention Offer ROI Calculator
Calculate the ROI of offering temporary discounts (e.g. 30% off for 3 months) to save cancelling SaaS subscribers. Free interactive model.
Pause vs Discount Comparison Calculator
Compare the revenue preservation and retention impact of offering an account pause versus a temporary discount in cancellation flows.
Tiered Pricing Builder
Model customer distribution across Basic, Pro, and Enterprise tiers. Calculate blended ARPU and total MRR. Free interactive SaaS pricing tool.
Price Per Seat Calculator
Calculate tiered per-seat subscription pricing with volume discounts. Instant calculation of effective price per seat and total monthly invoice.
Grandfathered Pricing Impact Calculator
Calculate the monthly and annual revenue gap caused by grandfathered legacy subscription pricing. Free interactive SaaS financial modeling tool.
Coupon Break-Even Calculator
Calculate how many months of retention are required to break even on promotional coupons and discounts. Free interactive SaaS pricing tool.
Value Metric Finder
Score candidate value metrics (seats, events, storage, active users) across predictability, value alignment, and customer friction. Free tool.
Cancellation Flow & Exit Surveys
Analyze churn reasons, structure save offers, and audit exit friction.
Exit Survey Question Generator
Generate unbiased, high-converting exit survey questions for B2B SaaS, prosumer, and developer tools. Free interactive question generator.
Cancellation Reason Analyzer
Analyze cancellation reasons, calculate percentage distributions, and identify top Pareto churn drivers. Free interactive SaaS analytics tool.
Save Offer Matcher
Match customer churn reasons (budget, seasonal, missing features, bugs) to compliant, high-converting retention offers. Free interactive tool.
Cancellation Flow Audit Checklist
Audit your SaaS cancellation flow against FTC Click-to-Cancel rules, California ARL, and UX standards. Free interactive scoring checklist.
Win-Back Offer Planner
Plan timing, incentives, and projected revenue recovery for cancelled SaaS subscribers. Free interactive win-back campaign planning tool.
Pause Length Planner
Determine optimal subscription pause durations (14, 30, 60, or 90 days) based on usage cadence and billing cycle. Free interactive tool.
Cancel Page Copy Generator
Generate clean, respectful cancellation screen copy with a clear cancel option. No dark patterns, guilt-trips, or misleading buttons. Free interactive tool.
Downgrade Path Designer
Structure downgrade paths from paid to free or lower tiers. Model preserved MRR and avoid complete subscription churn. Free interactive tool.
Churn Reason Taxonomy Builder
Standardize messy customer cancellation feedback into a MECE 5-category churn taxonomy. Free interactive classification framework tool.
Save Rate Calculator
Calculate your cancellation save rate percentage and total monthly recurring revenue preserved. Free interactive SaaS retention tool.
Billing & Payments
Compare Stripe and Dodo fees, estimate involuntary churn, and structure dunning.
Stripe Fee Calculator
Calculate exact Stripe credit card processing, billing, and international fees per transaction and monthly. Cites official Stripe pricing.
Dodo Payments Fee Calculator
Calculate Dodo Payments transaction fees, net proceeds, and effective merchant processing rates. Cites official Dodo Payments pricing.
Payment Processor Fee Comparison
Compare net revenue and fees between Stripe (Gateway) and Dodo Payments (Merchant of Record). Free interactive side-by-side SaaS comparison.
Failed Payment Recovery Calculator
Calculate recoverable MRR from failed credit card charges using automated smart retries and dunning emails. Free interactive SaaS recovery tool.
Dunning Schedule Builder
Build a multi-stage dunning schedule with automated card retries and email warnings to recover failed subscription billing. Free interactive tool.
Involuntary Churn Calculator
Calculate what percentage of your subscription churn is involuntary (failed cards) vs voluntary (manual cancel clicks). Free interactive tool.
Subscription Proration Calculator
Calculate exact prorated credits and charges when upgrading or downgrading subscription plans mid-cycle. Free interactive SaaS billing calculator.
Refund Impact Calculator
Calculate the true financial impact of customer refunds, including lost cash and unreturned payment gateway fees. Free interactive SaaS tool.
Currency Conversion Pricing Helper
Calculate international SaaS pricing using current FX rates, Purchasing Power Parity (PPP) adjustments, and psychological charm price endings.
Tax-Inclusive Price Calculator
Extract net base price and tax amounts from gross VAT or GST inclusive subscription prices. Free interactive SaaS billing calculator.
Compliance
Checklists and templates for FTC click-to-cancel, California ARL, and policies.
FTC Click-to-Cancel Checklist
Audit your SaaS cancellation flow against the FTC's 2024 Negative Option Rule. Actionable checklist with statutory citations and practical guidance.
California Auto-Renewal Checklist
Audit your SaaS subscription against California's Auto-Renewal Law (Cal. Bus. & Prof. Code §§ 17600 et seq.). Actionable statutory checklist.
Cancellation Policy Generator
Generate a plain-language, legally compliant subscription cancellation policy for your SaaS. Neutral, customizable, and ready to publish.
Refund Policy Generator
Generate a transparent, merchant-compliant refund policy for your SaaS product. Specify money-back guarantees and exceptions. Free tool.
Subscription Terms Checklist
Audit required checkout disclosures under FTC and state laws: recurring charges, billing frequency, and cancellation terms. Free checklist.
Renewal Reminder Email Template
Generate legally compliant annual subscription renewal reminder notices required by California ARL and FTC regulations. Free template tool.
Dark Pattern Audit
Audit your subscription flow for illegal dark patterns: confirmshaming, roach motels, hidden buttons, and misdirection. Free interactive tool.
Consent Checkbox Copy Generator
Generate legally compliant affirmative consent copy for subscription checkouts. Satisfies FTC, California ARL, and card network mandates.
EU Right of Withdrawal Checklist
Audit your SaaS compliance with the European Union Consumer Rights Directive (Directive 2011/83/EU) 14-day statutory withdrawal rules.
Cancellation Confirmation Email Template
Generate timestamped, legally compliant cancellation confirmation emails expected by regulators and required by some state laws. Free generator tool.
Growth, LTV & CAC
Compute customer lifetime value, acquisition cost payback, and Rule of 40.
LTV (Customer Lifetime Value) Calculator
Calculate true gross-margin-adjusted Customer Lifetime Value (LTV) and average customer lifespan in months. Free interactive SaaS growth calculator.
CAC (Customer Acquisition Cost) Calculator
Calculate fully loaded Customer Acquisition Cost (CAC) including ad spend, sales salaries, and software tools. Free interactive SaaS growth tool.
LTV to CAC Ratio Calculator
Calculate your LTV:CAC ratio. Benchmark unit economics against the 3:1 SaaS standard to evaluate growth efficiency and capital allocation.
CAC Payback Period Calculator
Calculate your CAC payback period in months. Determine how quickly customer subscription margins recover sales and marketing acquisition spend.
SaaS Magic Number Calculator
Calculate your SaaS Magic Number. Measure sales and marketing efficiency by comparing quarterly revenue growth against acquisition expenditures.
Rule of 40 Calculator
Calculate your SaaS Rule of 40 score: Growth Rate % + Profit Margin %. Evaluate overall subscription performance and investor appeal.
Burn Multiple Calculator
Calculate your SaaS Burn Multiple: Net Burn divided by Net New ARR. Evaluate how efficiently your startup turns burned capital into recurring revenue.
Payback by Channel Comparison
Compare CAC and payback periods across Organic, Paid Search, Outbound Sales, and Affiliate channels. Free interactive SaaS allocation tool.
Trial-to-Paid Conversion Calculator
Calculate your SaaS free trial to paid conversion rate percentage. Benchmark opt-in vs credit-card-upfront models. Free interactive tool.
Freemium Conversion Calculator
Calculate your freemium to paid customer upgrade rate and project monthly recurring revenue gains. Free interactive SaaS conversion tool.
Win-Back & Lifecycle Emails
Generate win-back copy, payment alerts, and trial expiration sequences.
Win-Back Email Generator
Generate personalized, high-converting win-back emails for churned SaaS subscribers. Template-based with variable replacements. Zero AI calls.
Failed Payment Email Generator
Generate polite, high-converting failed payment dunning notification emails with authenticated billing portal links. Free generator tool.
Trial Ending Email Generator
Generate high-converting trial expiration warning emails (3-day and 24-hour notices) with clear value summaries. Free generator tool.
Renewal Reminder Generator
Generate compliant annual subscription renewal reminders required by state auto-renewal laws and card networks. Free generator tool.
Downgrade Confirmation Email Generator
Generate clean, respectful plan downgrade confirmation emails. Confirm free tier access, data preservation, and easy reactivation paths.
Feedback Request Email Generator
Generate short, non-intrusive post-cancellation feedback request emails. Collect honest customer insights with zero defensive phrasing. Free tool.
Re-Engagement Sequence Planner
Plan a multi-stage email re-engagement sequence for inactive SaaS subscribers (Day 14, 30, and 60). Free interactive email planning tool.
Welcome Email Sequence Planner
Map a high-converting onboarding email cadence (Day 1, 3, 7, and 10) aligned with customer activation milestones. Free interactive SaaS planner.
Email Subject Line Tester
Test email subject lines for character count, mobile truncation, urgency triggers, and common spam trigger words. Free interactive tool.
Plain Text Email Formatter
Convert rich text or markdown email drafts into clean, high-deliverability plain text emails with clean bullets and links. Free tool.
SaaS Finance
Estimate cash runway, net burn, break-even MRR, and unit economics.
SaaS Runway Calculator
Calculate your SaaS cash runway in months and estimate your zero cash date. Model monthly net burn and growth scenarios. Free interactive tool.
Burn Rate Calculator
Calculate gross monthly burn rate and net monthly cash drain. Determine cash flow sustainability and burn ratios. Free interactive SaaS tool.
Break-Even MRR Calculator
Calculate the exact Monthly Recurring Revenue (MRR) required to achieve operational break-even after accounting for gross margin deductions.
SaaS Valuation Multiple Estimator
Estimate implied SaaS company valuation based on current ARR and your custom ARR multiple. Clean mathematical model with zero invented data.
SaaS Gross Margin Calculator
Calculate your SaaS gross margin percentage after deducting hosting, customer support, and payment processing COGS. Free interactive tool.
Cohort LTV Calculator
Model cumulative gross margin generated by a customer cohort over 12 to 24 months. Account for monthly retention decay. Free interactive tool.
Unit Economics Scorecard
Summarize your core SaaS unit economics: ARPU, Gross Margin %, CAC, LTV, and Payback Months in one unified dashboard. Free interactive tool.
Headcount Cost Planner
Calculate fully loaded headcount costs including payroll taxes, benefits, and equipment. Plan hiring budgets and monthly burn impact. Free tool.
Pricing Page Revenue Simulator
Simulate new monthly recurring revenue generated from pricing page traffic, visitor conversion rates, and plan price distribution. Free tool.
Investor Metrics One-Pager Generator
Generate a standardized financial and operational KPI summary for investors, board members, and pitch decks. Free interactive SaaS tool.
Customer Success
Score account health, quantify NPS and CSAT, and identify expansion readiness.
Customer Health Score Builder
Build a weighted customer health score based on product usage, license utilization, support sentiment, and payment health. Free interactive tool.
NPS (Net Promoter Score) Calculator
Calculate your Net Promoter Score (NPS) from Promoters, Passives, and Detractors. Free interactive customer loyalty calculator.
CSAT (Customer Satisfaction Score) Calculator
Calculate your Customer Satisfaction (CSAT) score percentage. Measure customer happiness following support interactions and feature launches.
CES (Customer Effort Score) Calculator
Calculate your Customer Effort Score (CES) on a 1-to-7 scale. Quantify product friction and ease of use to predict subscription retention.
Churn Risk Scorer
Score customer churn risk based on days since last login, ticket escalation, and seat utilization. Free interactive customer success tool.
Activation Completion Rate Calculator
Calculate your onboarding milestone completion rate and activation velocity. Measure customer time-to-value. Free interactive SaaS tool.
Feature Adoption Rate Calculator
Calculate feature adoption rate percentages across active accounts. Identify core sticky features vs underutilized capabilities. Free tool.
Support Ticket Churn Correlator
Analyze the statistical correlation between support ticket volume and customer churn. Identify the tipping point for account dissatisfaction.
QBR (Quarterly Business Review) Metrics Template
Generate an executive Quarterly Business Review (QBR) deck metrics scorecard showing ROI delivered, license utilization, and expansion goals.
Account Expansion Opportunity Finder
Identify high-intent accounts ready for tier upgrades or seat expansion based on capacity utilization (>85%). Free interactive SaaS tool.
Ready to stop subscription churn in your own SaaS?
BoolBul drops into your cancel button with one script tag. Collect actionable exit surveys, offer reason-matched pauses and discounts before customers cancel, and keep a one-click cancel link on every screen. Works with Stripe and Dodo Payments.