For founders in year 0 or year 1
Small business startup toolkit
Most small businesses fail on cash flow, not the idea. These calcs let you sanity-check the model before you commit — margin per unit, months of runway, breakeven point, and whether that first employee is actually affordable.
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Gross Profit Margin Calculator
Margin per unit is the foundation. Below 30% for a service business or 40% for a product business, everything downstream is fragile.
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Break-Even Units Calculator (with Target Profit)
How many units at that margin cover fixed costs. Compare against a realistic sales pipeline — if it takes six months, budget accordingly.
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Cash Runway Calculator
Cash on hand ÷ monthly burn. Under 6 months and every hire, marketing spend, or tool subscription needs justifying in weeks-of-runway.
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Total Employee Cost Calculator
Salary is 60-70% of what an employee actually costs. Add payroll tax, benefits, software, and equipment before deciding you can afford the hire.
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Startup Equity Dilution Calculator
If you take investment, know what you're giving up per round. A quick round today at a low valuation costs more equity than one 18 months from now at a higher one.
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Save your progress
Each calculator remembers your last inputs on your device, so you can leave and come back to any of these without losing your numbers. Every step also has a Share this calculation button that copies a link with your inputs baked in — useful for talking things through with a partner or advisor.