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The founder's toolkit · Always free
An idea is a start. Make your next move count.
Run the numbers. Find your starting point. Everything here is free, with no sign-in or credits.
Free startup calculators
All calculatorsEvery number. A clearer decision.
Your inputs. Clear working. Find the costs, margins and milestones behind your next move.
- Break-evenHow many units you have to sell before the business stops losing money.Open calculator
- Startup costWhat it costs to open the doors, and how long your cash lasts after that.Open calculator
- Return on investmentHow long the money you put in takes to come back, and what it returns in a year.Open calculator
- Funding neededHow long your cash lasts, and how much more you need to reach the month you are aiming for.Open calculator
- Customer Acquisition CostHow much you spend to acquire a single paying customer.Open calculator
- Lifetime Value (LTV)A strategic tool to calculate Lifetime Value (LTV) for your business.Open calculator
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- LTV:CAC RatioA strategic tool to calculate LTV:CAC Ratio for your business.Open calculator
- Payback PeriodA strategic tool to calculate Payback Period for your business.Open calculator
- Gross MarginA strategic tool to calculate Gross Margin for your business.Open calculator
- Net MarginA strategic tool to calculate Net Margin for your business.Open calculator
- ARPUA strategic tool to calculate ARPU for your business.Open calculator
- Churn RateA strategic tool to calculate Churn Rate for your business.Open calculator
Startup guides
All guidesOpen a new chapter.
Practical reading for the decisions ahead, with fresh picks from the library each visit.
- B2B Cold Email Lead Generation: High-Converting FrameworksCold email is not dead; it has simply evolved. Spray-and-pray tactics will ruin your domain reputation and yield zero results…Read the guide
- Competitor Analysis Framework for FoundersObsessing over competitors leads to derivative products. However, ignoring them entirely is strategic negligence. A strong…Read the guide
- Product-Led Growth Onboarding: Driving Rapid ActivationIn a PLG model, your product must sell itself. This means the onboarding experience is your primary sales rep. If users do not…Read the guide
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- Product-Market Fit Metrics: How to Measure True PMFProduct-market fit is not a gut feeling; it is a mathematical reality visible in your data. If you scale acquisition before…Read the guide
- Zero-Investment Business Models for Bootstrapped FoundersCapital is an accelerant, not a prerequisite. Bootstrapping forces financial discipline and rapid iteration. By leveraging…Read the guide
- Pre-Launch Checklist for Startups: Technical and Marketing AuditThe market doesn't forgive unpreparedness. Your pre-launch phase isn't a suggestion; it’s the crucible where viability is forged…Read the guide
Startup glossary
Full glossaryBig ideas. Plain words.
The terms you will meet along the way, explained in plain language.
- Employee Stock Ownership Plan (ESOP)An employee benefit plan that gives workers ownership interest in the company.See the definition
- Strategic InvestorA corporate investor (like Google Ventures or Intel Capital) that invests for both financial return and…See the definition
- Gross Revenue ChurnThe percentage of recurring revenue lost due to cancellations and downgrades over a given period.See the definition
- Burn RateThe rate at which a company is losing money. Gross burn is total monthly expenses; Net burn is total expenses…See the definition
- LTV:CAC RatioThe relationship between the lifetime value of a customer and the cost to acquire them. It measures the ROI…See the definition
- DilutionThe decrease in existing shareholders' ownership percentage of a company as a result of the issuance of new…See the definition
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- Gross ProfitThe profit a company makes after deducting the costs associated with making and selling its products.See the definition
- Bottom-Up SalesA sales strategy where a product is adopted by individual contributors or small teams within a company before…See the definition
- Cap Table ManagementThe process of managing the capitalization table using software to ensure accuracy during fundraises, 409A…See the definition
- DAU/MAU RatioThe ratio of daily active users to monthly active users. It measures 'stickiness'—how often users are…See the definition
- Gross MarginThe percentage of revenue that remains after deducting the direct costs associated with delivering the…See the definition
- UptimeThe percentage of time that a system or network is operational and available to users.See the definition
From the blog
All postsRead beyond the obvious.
Ideas, field notes and founder lessons worth taking into your next decision.
- The Two Week Wait That Built a Van BusinessHow to launch a van-based bicycle mechanic operation that skips retail leases and fixes the two-week repair shop queue.Read the story
- selling social media caption templates for niche businessesDesign tools made graphics easy, but small business owners still spend hours staring at blank text boxes before posting.Read the story
- Day one goes badly because nobody wrote it downA practical breakdown of creating and selling onboarding checklist products to small business owners who lack structured training.Read the story
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- 30 Smart Village Business Ideas That Actually Make Money30 village businesses laid out along the farming year: before sowing, while crops grow, at harvest, after harvest and every day…Read the story
- 50 Realistic Part-Time Business Ideas for Extra Income50 part-time business ideas sorted by the hours you actually have: evening laptop work, weekend jobs with tools, teaching, food…Read the story
- 50 Flexible Business Ideas for Women Balancing Work and Life50 real flexible business ideas for women, home-based and India-focused, from BBI's own research library. Real links, no invented…Read the story