Free calculators for SaaS founders and operators: runway, burn, LTV/CAC, MRR/ARR, dilution, option value, seed sizing. Formulas and worked examples included.https://saasmath.com/https://saasmath.com/posts/t2d3-growth-explained/https://saasmath.com/posts/t2d3-growth-explained/T2D3 is the trajectory Neeraj Agrawal identified for SaaS companies that reach $100M ARR: triple, triple, double, double, double after crossing $1M ARR.Sun, 02 Aug 2026 00:00:00 GMThttps://saasmath.com/posts/startup-equity-worth/https://saasmath.com/posts/startup-equity-worth/The realistic value of a startup option grant depends on strike, FMV, future dilution, and exit valuation. Here is the math and the honest expectation.Sun, 02 Aug 2026 00:00:00 GMThttps://saasmath.com/posts/startup-dilution-guide/https://saasmath.com/posts/startup-dilution-guide/How much of your company you keep after seed, A, and B. Standard ranges, option pool traps, and the levers founders actually control.Sun, 02 Aug 2026 00:00:00 GMThttps://saasmath.com/posts/saas-quick-ratio-benchmarks/https://saasmath.com/posts/saas-quick-ratio-benchmarks/Mamoon Hamid's SaaS quick ratio measures how efficiently you grow. Here are benchmark bands by ARR stage and what breaks them.Sun, 02 Aug 2026 00:00:00 GMThttps://saasmath.com/posts/rule-of-40-saas/https://saasmath.com/posts/rule-of-40-saas/Brad Feld's Rule of 40 says growth rate plus profit margin should equal or exceed 40. Here is where it holds, where it breaks, and how public SaaS stacks up.Sun, 02 Aug 2026 00:00:00 GMThttps://saasmath.com/posts/ltv-cac-ratio-explained/https://saasmath.com/posts/ltv-cac-ratio-explained/The 3:1 target from David Skok is a benchmark, not a law. Here is how the formula actually works, when a lower ratio is fine, and when 3:1 is a trap.Sun, 02 Aug 2026 00:00:00 GMThttps://saasmath.com/posts/how-to-calculate-startup-runway/https://saasmath.com/posts/how-to-calculate-startup-runway/Runway is cash on hand divided by net monthly burn. This guide covers what counts as burn, why net vs gross matters, and when to start raising.Sun, 02 Aug 2026 00:00:00 GMThttps://saasmath.com/posts/how-much-to-raise-seed/https://saasmath.com/posts/how-much-to-raise-seed/Reverse-engineer a seed round size from target runway, team, and burn. Includes the 18-month rule and when to raise more or less.Sun, 02 Aug 2026 00:00:00 GMThttps://saasmath.com/posts/gross-vs-net-burn-rate/https://saasmath.com/posts/gross-vs-net-burn-rate/Gross burn measures cost structure. Net burn measures how fast the bank runs out. Investors ask for both, and treating them as one number hides real problems.Sun, 02 Aug 2026 00:00:00 GMThttps://saasmath.com/posts/bridge-round-guide/https://saasmath.com/posts/bridge-round-guide/A bridge round buys time between priced rounds using a SAFE or convertible note. Here is how cap, discount, and conversion math work, and when a bridge is the wrong idea.Sun, 02 Aug 2026 00:00:00 GMT