Startup and funding calculators
The numbers founders need before and during a raise: how long the cash lasts, how efficiently it turns into ARR, what each round and option-pool top-up does to ownership, how SAFEs and convertible notes convert, and three ways to value a pre-revenue company. Conversion maths follows Y Combinator's own SAFE documents.
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- Burn Multiple CalculatorNet burn ÷ net new ARR, rated on David Sacks's efficiency bands.
- Convertible Note CalculatorConvertible note conversion with interest, valuation cap and discount.
- SAFE CalculatorPost-money SAFE conversion with caps, discounts and the option pool, YC method.
- Startup Dilution CalculatorFounder ownership through up to three rounds, with option pool top-ups.
- Startup Runway CalculatorMonths of runway from cash and net burn, with growth and a default alive check.
- Startup Valuation CalculatorPre-money valuation by the Berkus, scorecard or VC method.
- Stock Option Tax CalculatorTax on exercising and selling UK EMI or unapproved options, or US NSOs.