All tools
65 free calculators for freelancers, solopreneurs, and indie founders. Search by name or browse by decision area.
Plan Your Build 3
AI Stack Cost
Estimate your full AI app stack cost at different user scales — hosting, DB, auth, AI API, and services.
Open →Vibe Code
Compare Cursor, Bolt, Lovable, Replit, and v0 for your project type, complexity, and skill level.
Open →Vector DB Cost
Pinecone, Postgres+pgvector, LanceDB, or Turbopuffer — cheapest for your workload.
Open →Run the Numbers 42
AI Product Economics 13
AI Margin
Calculate per-user margin for AI products from subscription price, API token costs, hosting, and per-user expenses.
Open →Profit Margin
Calculate gross margin and markup, or set prices from desired margin percentages.
Open →Unit Economics
Evaluate LTV:CAC ratio, payback period, and per-customer viability.
Open →Startup Costs
Estimate pre-launch costs by category with one-time and recurring breakdown for first-year budget.
Open →Margin / Markup
Convert margin, markup, and discount with live formulas you can trust.
Open →Price Elasticity
Calculate price elasticity of demand and see whether a price change grows or shrinks revenue.
Open →Wholesale Pricing
Set wholesale price, retail price, and MOQ revenue from unit cost and overhead using cost-plus, keystone, or target-margin strategies.
Open →SaaS Pricing
Set monthly price floors from gross-margin and CAC payback constraints.
Open →Agent Cost / Customer
AI and infra spend per activated retained user, with gross margin at any subscription price.
Open →Trial Target
Reverse-solve trial→paid conversion rate from revenue target, signups, and ARPU.
Open →AI Support Cost
Compare AI-first and human-only support cost with token spend and escalation overhead.
Open →AI Attribution
ARR attributable to AI features, net of infra cost, with cohort gross margin and retention lift.
Open →Price Drop Test
Margin under 10/30/50% LLM price drops with both keep-savings and pass-through views.
Open →Bootstrapped Growth 17
Bootstrapped Runway
Calculate personal runway and months to ramen/fully profitable from savings, side income, and MRR growth.
Open →Solo Unit Econ
Calculate LTV, CAC, payback, and break-even customers calibrated for bootstrapped scale with organic CAC.
Open →Break-Even Units
Find break-even units, revenue, and target-profit volume fast.
Open →Runway
Calculate months of runway from cash, burn rate, and revenue growth assumptions.
Open →Burn Rate
Calculate monthly burn rate from line items with category breakdown and runway estimate.
Open →CLV
Calculate CLV, CLV:CAC ratio, and acquisition payback from purchase patterns.
Open →ROI + Payback
See ROI, annualized return, and payback timing before you fund the project.
Open →Sales Forecast
Forecast MRR and cumulative revenue from growth, conversion, and pipeline assumptions.
Open →Employee Cost
Calculate the true total cost of an employee beyond salary — taxes, benefits, and overhead.
Open →Cost Per Hire
Calculate total recruiting cost per position from ads, agency fees, internal time, and onboarding.
Open →Cash Conversion Cycle
Measure CCC and estimate working-capital lockup from DIO, DSO, and DPO assumptions.
Open →Inventory Turnover
Calculate how quickly your business sells and replaces stock with industry benchmarks.
Open →Burn Multiple
Are you burning faster than you're growing? Net monthly burn ÷ net new ARR — the cash-efficiency check.
Open →MRR/ARR Growth
Project bootstrapped MRR and ARR at 3, 6, and 12 months. See how many months until you hit a target you can live on.
Open →Rev/Employee
Hire-or-don't sanity check. Revenue and profit per person — compare against staying solo.
Open →Salary Budget
Plan a small first-team salary budget across roles before you commit to hiring.
Open →AI Cost Shock
Stress-test runway against an LLM vendor price hike with break-even revenue trajectory.
Open →Freelance to Founder 1
Marketing & Acquisition 11
Churn & Retention
Estimate recovered customers and revenue lift from retention improvements.
Open →A/B Significance
Check if your A/B test results are statistically significant and estimate sample size for reliable conclusions.
Open →CAC
Calculate customer acquisition cost, payback period, and LTV:CAC efficiency.
Open →ROAS Calculator
Calculate actual ROAS, break-even ROAS, profit after ad spend, target CPA, and required conversion rate for advertising campaigns.
Open →Email ROI
Calculate projected revenue, ROI, cost per acquisition, and break-even conversion rate for email marketing campaigns.
Open →Content Payback
Estimate cumulative ROI, payback month, and 12/24/36-month returns for content marketing investment with break-even traffic volume.
Open →NPS Calculator
Calculate NPS from promoter, passive, and detractor counts with benchmark context and action guidance.
Open →CAC Payback
How many months to recover your CAC from gross profit, with LTV:CAC ratio sanity-check.
Open →Landing Page ROI
Calculate landing-page revenue, ROI, and cost-per-conversion from traffic, conversion rate, and order value.
Open →Social Media ROI
Spend → reach → engagement → conversion → ROI. See whether the channel is paying its way.
Open →Budget Allocator
Allocate marketing budget across channels with ROAS estimates and blended-return projection.
Open →Make the Call 10
Build vs Buy
Compare building infrastructure yourself versus buying managed services with per-component build/buy verdicts.
Open →SaaS Valuation
Estimate what your solo SaaS is worth using indie/micro-SaaS multiples with key valuation factors.
Open →Valuation
Estimate business worth using revenue, SDE, and EBITDA multiples with blended range.
Open →Contractor vs Employee
Compare the same role as W-2 or 1099 and find the true annual cost break-even point.
Open →Commute vs Remote
Compare office, hybrid, and remote schedules in cash and time.
Open →Ship or Kill
Get a brutally honest SHIP, ITERATE, or KILL verdict on your side project based on traction and market signal.
Open →VC vs Stay Solo
Take the cheque or stay bootstrapped? Model what each funding round leaves you with versus full ownership.
Open →Vendor Lock-In
Engineering, downtime, and payback when migrating between LLM providers.
Open →Pricing Picker
Flat monthly, per-seat, usage-based, or hybrid? Compare projected revenue side-by-side.
Open →Marketplace ROI
Net margin and break-even visitor count for GPT Store, Anthropic plugins, and similar marketplaces.
Open →Freelance & Consulting 10
Freelance Rate
Set confident rate floors from utilization, overhead, and income targets.
Open →Hourly to Salary
Convert hourly and salary compensation with PTO and overtime adjustments.
Open →Day Rate
Calculate your consulting day rate from annual income target, working days, overhead, and tax.
Open →Project Pricing
Estimate project price from hours, complexity, risk buffer, and discount with effective rate check.
Open →Tax Estimator
Estimate quarterly tax set-aside from freelance income, expenses, and deductions. Not tax advice.
Open →Invoice Late Fee
Calculate late-payment penalties from grace days, fixed fees, and annual-interest terms.
Open →Scope Creep Cost
Quantify the true cost of scope creep by comparing quoted vs actual hours to reveal your effective rate.
Open →Salary / Paycheck
Estimate annual and paycheck outcomes with simplified tax assumptions.
Open →Meeting Cost
What does that recurring meeting actually cost in salary time? Use it to defend deep work.
Open →Time Zone Overlap
Find fair async meeting windows across global contractors with rotation and DST warnings.
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