Free startup tools that founders actually use
Skip spreadsheets and get clear answers fast. These calculators are built for technical founders planning runway, burn, and growth. No signups, no data storage, and built to share with your team.
Founder-first calculators
Built around the exact numbers you track every month.
Private by default
Everything runs locally in your browser. No accounts required.
Shareable outputs
Copy results and send them to cofounders or investors instantly.
Free tools
Suggest the next toolStartup Runway & Burn Rate Calculator
Audience: Founders
Estimate runway, net burn, and breakeven from cash, MRR, expenses, and growth.
Usage-Based Pricing Simulator
Audience: Founders
Model unit pricing, volume discounts, and gross margin by usage tier.
LTV/CAC + Payback Calculator
Audience: Founders
Calculate LTV, LTV/CAC, payback months, and customer lifetime.
Churn & Retention Revenue Simulator
Audience: Founders
Project MRR with churn, expansion, and new sales to track retention over time.
TAM/SAM/SOM Market Sizer
Audience: Founders
Estimate market size with top-down and bottom-up TAM, SAM, and SOM.
Automation ROI / Time-Saved Calculator
Audience: Founders
Quantify time saved, ROI, and payback from automation tooling.
Hire vs Automate Cost Comparator
Audience: Founders
Compare FTE costs to automation tools to see breakeven and savings.
Dilution & Cap Table Calculator
Audience: Founders
Estimate dilution, post-money ownership, and option pool impact.
GTM Funnel Targets Calculator
Audience: Founders
Plan traffic, lead, and sales targets to hit revenue goals.
Investor Update Builder
Audience: Founders
Create a concise investor update with KPIs, highlights, challenges, and asks.
Runway Sensitivity Matrix
Audience: Founders
Stress-test runway across revenue and expense scenarios.
Hiring Plan Runway Impact
Audience: Founders
Model how planned hires change burn rate and runway.
Fundraise Target & Runway Extension Planner
Audience: Founders
Calculate how much to raise to extend runway by your target months.
Rule of 40 + SaaS Health Score
Audience: Founders
Measure growth, margin, and burn efficiency with Rule of 40 and burn multiple.
Gross Margin & Contribution Margin Calculator
Audience: Founders
Model unit economics, gross margin, and contribution margin per customer.
Pricing Tier Mix Forecaster
Audience: Founders
Forecast ARPA and ARR based on pricing tier mix assumptions.
Sales Pipeline Coverage & Activity Targets
Audience: Founders
Turn revenue goals into pipeline, opp, and activity targets.
MRR Waterfall / ARR Bridge Builder
Audience: Founders
Build an MRR waterfall to see net new, expansion, churn, and ARR bridge.
Growth Rate to Target ARR
Audience: Founders
Estimate months to reach a target ARR at your growth rate.
Marketing Channel ROI Comparator
Audience: Founders
Compare CAC, ROI, and payback across marketing channels.
Prepay vs Monthly Cash Flow Impact
Audience: Founders
Model the cash flow impact of annual prepay discounts.
Infrastructure Cost per Active User
Audience: Founders
Track infra spend per active user and margin impact.
More founder tools are coming
We are building a full library of free calculators for pricing, LTV/CAC, automation ROI, and more. Share this page with a founder friend and keep an eye on new drops.