Free calculators for SaaS founders
Runway, burn, LTV/CAC, cap-table dilution, option value. Formulas straight from Skok, Feld, Bessemer, and Y Combinator. Results are shareable via URL. No signup, no paywall.
All calculators
- Startup Runway CalculatorHow many months of cash you have left.
- Burn Rate CalculatorGross vs net burn from bank balances.
- LTV / CAC Ratio CalculatorCustomer lifetime value against acquisition cost.
- MRR / ARR Growth CalculatorMonths from current MRR to your target.
- SaaS Quick Ratio CalculatorHow efficiently you replace lost revenue.
- Rule of 40 CalculatorGrowth plus margin against the 40 threshold.
- Cap Table Dilution CalculatorFounder dilution after a priced round.
- Employee Stock Option Value CalculatorPaper value today and net at exit.
- Seed Round Sizing CalculatorHow much to raise given team, burn, runway.
- Bridge Round CalculatorConvertible / SAFE math with cap and discount.
Why another calculator site
Because Baremetrics and ChartMogul need your Stripe key, NerdWallet is for mortgages, and a founder shouldn't have to open a spreadsheet to answer "how long is my runway". Every calculator on saasmath is one input away from a shareable answer.