Founder decision tools
Decisions for solo founders, backed by the math.
65 calculators across stack costs, runway, pricing, ship-or-kill, and unit economics. Methodology is public.
Pick your goal
Plan Your AI Stack
Plan your AI stack: estimate first-year costs for APIs, hosting, and tooling before you build.
Open →Price Your Product
Set price floors from margins, elasticity, and competitive positioning.
Open →Know Your Runway
Know your runway: model burn, revenue growth, and break-even before cash pressure hits.
Open →Optimize Freelance Income
Optimize freelance income: set sustainable rates and compare compensation structures clearly.
Open →Validate Unit Economics
Validate unit economics: stress-test profitability at the customer and product level.
Open →Evaluate Your Business
Evaluate your business: estimate what it's worth and whether investments are paying back.
Open →Worth reading.
Tighter guides. Primary sources only.
How to Price a Product
Price a product by matching the model to your cost structure and willingness-to-pay evidence: cost-plus floor, competitive ceiling, value aim.
How to Plan Startup Runway
Plan runway around gross vs. net burn, a 12-month cash waterfall, and the trigger thresholds that force action before the zero-cash cliff.
How to Run A/B Tests That Actually Work
Run A/B tests that survive replication: pick one metric, power the test, stop peeking, and read results with the practical-significance check most teams skip.
Run the numbers.
Browse all 65 calculators.
Free, private, no signup. Pricing, runway, ship-or-kill, unit economics, and more.
Run the Numbers
Profit Margin
Calculate gross margin and markup, or set prices from desired margin percentages.
Open →Run the Numbers
Runway
Calculate months of runway from cash, burn rate, and revenue growth assumptions.
Open →Make the Call
Ship or Kill
Get a brutally honest SHIP, ITERATE, or KILL verdict on your side project based on traction and market signal.
Open →