Free founder planning & startup tools for better business decisions.
BLKCAT Toolkit is a library of free startup calculators, founder assessment tools, revenue planning tools, and marketing optimisation tools designed to help early-stage founders make sharper decisions before they invest more time, money, or energy.
Startup Planning Tools
These startup planning tools help founders evaluate startup ideas, estimate startup costs, test founder-business fit, explore market opportunity, model runway, and understand how long it may take to break even before building too much too early.
Idea Viability Scorecard
Score an idea across problem, demand, differentiation, founder fit, and execution.
DiagnosticStartup Idea Validator
A lightweight founder-facing diagnostic for validating a business idea before you build.
ValidationStartup Idea Generator + Validator
Generate new ideas from founder inputs and score them instantly.
IdeasValidation + Breakeven Planner
Blend offer economics with lead generation and conversion assumptions.
PlannerWhat Business Should I Start?
Match your interests, skills, budget, and goals to business models that are most likely to fit.
DirectionFounder–Business Fit Calculator
Match your interests, skills, work style, and risk tolerance to business models that suit you best.
FitMarket Opportunity Calculator
Test whether a niche is large enough and what a realistic revenue ceiling looks like.
MarketTAM SAM SOM Calculator
Estimate total addressable market, serviceable available market, and serviceable obtainable market.
Market SizeStartup Cost Calculator
Estimate setup costs, monthly burn, runway, and the minimum budget needed to launch.
BudgetStartup Runway Calculator (Advanced)
Model cash runway using starting cash, monthly burn, revenue, and runway risk assumptions.
RunwayBreak-Even Time Calculator
Estimate how many months it may take for the business to recover startup costs and reach break-even.
Break-EvenFounder Readiness Score
Evaluate whether you are realistically ready to start a business based on skills, time, risk tolerance, and financial runway.
ReadinessRevenue & Pricing Tools
Use these revenue and pricing calculators to estimate profit, model monthly income goals, improve offer pricing, calculate breakeven points, evaluate customer value, and better understand the economics of a business model before scaling it.
Digital Product Revenue Planner
Forecast revenue, profit, breakeven, and launch outcomes for a digital product.
RevenueAudience Profit Calculator
Estimate launch revenue from audience size, open rates, clicks, and conversion.
AudienceOffer Pricing Optimizer
Set better service pricing based on hours, costs, desired income, and capacity.
PricingCourse Breakeven Calculator
Find how many students you need to recover course creation and launch costs.
CourseBusiness Idea Profitability Calculator
Estimate margins, breakeven point, and profit potential for a new product or business idea.
ProfitFounder Income Goal Calculator
Calculate how much revenue and how many customers you need to reach your desired income.
IncomeSaaS Pricing Calculator
Model monthly recurring revenue, churn impact, and annual revenue for SaaS products.
SaaSWebsite Profit Calculator
Estimate website revenue based on traffic, conversion rates, product price, and affiliate income.
WebsiteCustomer Lifetime Value (LTV) Calculator
Estimate the revenue value of an average customer over their full relationship with the business.
LTVLTV:CAC Ratio Calculator
Compare customer value against acquisition cost to assess whether your growth model is commercially healthy.
Unit EconomicsMarketing & Conversion Tools
These marketing and conversion tools help founders measure ROI, test landing-page performance, estimate conversion lift, calculate customer acquisition cost, evaluate cost per lead, analyse funnel performance, and understand how optimisation changes revenue outcomes across websites, funnels, and campaigns.
Marketing ROI Calculator
Measure the return on advertising spend based on conversion rates and revenue per sale.
MarketingA/B Test Significance Calculator
Determine whether a conversion test result is statistically significant or just random variation.
TestingAd Conversion Rate Calculator
Calculate conversion rates, cost per conversion, and revenue from advertising campaigns.
AdsConversion Lift Revenue Calculator
See how small improvements in conversion rate can dramatically increase revenue.
GrowthLow Conversion Revenue Loss Calculator
Estimate how much revenue you are losing from underperforming conversion rates.
OptimisationCustomer Acquisition Cost (CAC) Calculator
Calculate how much it costs to acquire a single customer based on marketing and sales spend.
CACCost Per Lead (CPL) Calculator
Estimate the cost of generating each lead from advertising and marketing campaigns.
CPLSales Funnel Conversion Calculator
Track how users move through your funnel and identify where conversion drops occur.
FunnelEmail Marketing Revenue Calculator
Estimate revenue generated from email campaigns using list size, open rates, and conversions.
EmailFounder Assessment Tools
Use these founder assessment tools to understand your strengths, thinking style, decision patterns, risk tolerance, time allocation, stress load, burnout risk, and founder readiness so you can build a business that fits the way you actually work.
Founder Strengths Assessment
Identify your strongest founder capabilities across strategy, creativity, systems, marketing, leadership, and execution.
StrengthsFounder Cognitive Style Calculator
Discover how you think as a founder across visionary, analytical, systems, relational, creative, and execution styles.
ThinkingFounder Skill Gap Analyzer
Identify missing capabilities across marketing, sales, finance, product, and operations.
SkillsEntrepreneur Focus Style Test
Discover whether you think like a builder, marketer, operator, strategist, or creator.
MindsetBusiness Decision Style Calculator
Identify whether you make decisions through data, intuition, consensus, experimentation, or long-term strategy.
DecisionsEntrepreneur Risk Tolerance Calculator
Assess how comfortable you are with financial risk, uncertainty, experimentation, and fast decision-making.
RiskFounder Time Allocation Calculator
Analyse how your weekly time is distributed across high-leverage and low-leverage activities.
TimeFounder Burn Rate Stress Calculator
Estimate stress and sustainability based on workload, financial pressure, and operational demands.
StressFounder Burnout Risk Calculator
Estimate burnout risk based on workload, stress, financial pressure, and support systems.
HealthCultural Impact and Values Systems
These tools help founders evaluate more than commercial viability alone. Use them to assess cultural integrity, understand how value circulates through communities, test whether a business model is extractive or regenerative, and design ventures that align with long-term values, identity, and shared impact.
Cultural Integrity Score Calculator
Assess whether a business idea aligns with cultural values, responsibility, respect, and ethical use of knowledge.
IntegrityCommunity Impact Multiplier Calculator
Estimate how revenue flows through local spending, jobs, reinvestment, and shared economic value.
ImpactCultural Risk & Misuse Detector
Identify potential risks around appropriation, misrepresentation, and unethical use of cultural material or ideas.
RiskCollective vs Individual Wealth Planner
Balance personal financial goals with family, community, or shared economic responsibilities.
WealthLand-Based Business Viability Tool
Evaluate the feasibility of land-based, place-based, or regenerative business models using practical inputs.
LandIntergenerational Business Longevity Calculator
Test whether a business is likely to endure beyond the founder through systems, transferability, and resilience.
LongevityValues-Based Pricing Calculator
Build pricing strategies that balance accessibility, sustainability, fairness, and commercial reality.
PricingIdentity–Business Alignment Map
Measure how well a business direction aligns with your lived experience, purpose, and long-term motivation.
AlignmentStory Strength Analyzer
Evaluate how authentic, differentiated, and commercially clear your founder or business story is.
StoryExtraction vs Regeneration Business Model Test
Classify whether a business model primarily extracts value, sustains value, or helps regenerate value over time.
Regeneration