Calculators
65 calculators for solo founders and freelancers, by decision. Each one runs in your browser and shows its method. If you are not sure which you need, start from your decision.
Plan the build 3
- AI Stack Cost Calculator Estimate your full AI app stack cost at different user scales — hosting, DB, auth, AI API, and services.
- Vibe Code Platform Comparison Compare Cursor, Bolt, Lovable, Replit, and v0 for your project type, complexity, and skill level.
- Embeddings DB Cost Pinecone, Postgres+pgvector, LanceDB, or Turbopuffer — cheapest for your workload.
Run the numbers 42
AI product economics 13
- AI Product Margin Calculator Calculate per-user margin for AI products from subscription price, API token costs, hosting, and per-user expenses.
- Profit Margin Calculator Calculate gross margin and markup, or set prices from desired margin percentages.
- Unit Economics Calculator Evaluate LTV:CAC ratio, payback period, and per-customer viability.
- Startup Cost Estimator Estimate pre-launch costs by category with one-time and recurring breakdown for first-year budget.
- Profit Margin / Markup / Discount Calculator Convert margin, markup, and discount with live formulas you can trust.
- Price Elasticity Calculator Calculate price elasticity of demand and see whether a price change grows or shrinks revenue.
- Wholesale Pricing Calculator Set wholesale price, retail price, and MOQ revenue from unit cost and overhead using cost-plus, keystone, or target-margin strategies.
- SaaS Pricing Strategy Calculator Set monthly price floors from gross-margin and CAC payback constraints.
- Agent Cost Per Validated Customer AI and infra spend per activated retained user, with gross margin at any subscription price.
- Free Trial to Paid Target Reverse-solve trial→paid conversion rate from revenue target, signups, and ARPU.
- AI vs Human Support Cost Compare AI-first and human-only support cost with token spend and escalation overhead.
- AI Feature Attribution ARR attributable to AI features, net of infra cost, with cohort gross margin and retention lift.
- Model Price Drop Stress Test Margin under 10/30/50% LLM price drops with both keep-savings and pass-through views.
Bootstrapped growth 17
- Bootstrapped Runway Calculator Calculate personal runway and months to ramen/fully profitable from savings, side income, and MRR growth.
- Solo Founder Unit Economics Calculate LTV, CAC, payback, and break-even customers calibrated for bootstrapped scale with organic CAC.
- Break-Even Units Calculator Find break-even units, revenue, and target-profit volume fast.
- Startup Runway Calculator Calculate months of runway from cash, burn rate, and revenue growth assumptions.
- Monthly Burn Rate Calculator Calculate monthly burn rate from line items with category breakdown and runway estimate.
- Customer Lifetime Value Calculator Calculate CLV, CLV:CAC ratio, and acquisition payback from purchase patterns.
- ROI + Payback Period Calculator See ROI, annualized return, and payback timing before you fund the project.
- Sales Forecast Calculator Forecast MRR and cumulative revenue from growth, conversion, and pipeline assumptions.
- Employee Cost Calculator Calculate the true total cost of an employee beyond salary — taxes, benefits, and overhead.
- Cost Per Hire Calculator Calculate total recruiting cost per position from ads, agency fees, internal time, and onboarding.
- Cash Conversion Cycle Calculator Measure CCC and estimate working-capital lockup from DIO, DSO, and DPO assumptions.
- Inventory Turnover Calculator Calculate how quickly your business sells and replaces stock with industry benchmarks.
- Burn Multiple Calculator Are you burning faster than you're growing? Net monthly burn ÷ net new ARR — the cash-efficiency check.
- MRR / ARR Growth Calculator Project bootstrapped MRR and ARR at 3, 6, and 12 months. See how many months until you hit a target you can live on.
- Revenue Per Employee Calculator Hire-or-don't sanity check. Revenue and profit per person — compare against staying solo.
- Team Salary Budget Calculator Plan a small first-team salary budget across roles before you commit to hiring.
- Runway With AI Cost Shock Stress-test runway against an LLM vendor price hike with break-even revenue trajectory.
Freelance to founder 1
Marketing and acquisition 11
- Churn & Retention Calculator Estimate recovered customers and revenue lift from retention improvements.
- A/B Test Significance Calculator Check if your A/B test results are statistically significant and estimate sample size for reliable conclusions.
- CAC Calculator Calculate customer acquisition cost, payback period, and LTV:CAC efficiency.
- Ad Spend / ROAS Calculator Calculate actual ROAS, break-even ROAS, profit after ad spend, target CPA, and required conversion rate for advertising campaigns.
- Email Marketing ROI Calculator Calculate projected revenue, ROI, cost per acquisition, and break-even conversion rate for email marketing campaigns.
- Content Marketing Payback Calculator Estimate cumulative ROI, payback month, and 12/24/36-month returns for content marketing investment with break-even traffic volume.
- Net Promoter Score (NPS) Calculator Calculate NPS from promoter, passive, and detractor counts with benchmark context and action guidance.
- CAC Payback Period Calculator How many months to recover your CAC from gross profit, with LTV:CAC ratio sanity-check.
- Landing Page Conversion Calculator Calculate landing-page revenue, ROI, and cost-per-conversion from traffic, conversion rate, and order value.
- Social Media ROI Calculator Spend → reach → engagement → conversion → ROI. See whether the channel is paying its way.
- Marketing Budget Allocator Allocate marketing budget across channels with ROAS estimates and blended-return projection.
Make the call 10
- Build vs Buy Decision Engine Compare building infrastructure yourself versus buying managed services with per-component build/buy verdicts.
- One-Person SaaS Valuation Estimate what your solo SaaS is worth using indie/micro-SaaS multiples with key valuation factors.
- Business Valuation Calculator Estimate business worth using revenue, SDE, and EBITDA multiples with blended range.
- Contractor vs Employee Calculator Compare the same role as W-2 or 1099 and find the true annual cost break-even point.
- Commute vs Remote Cost & Time Calculator Compare office, hybrid, and remote schedules in cash and time.
- Ship-or-Kill Decision Score Get a brutally honest SHIP, ITERATE, or KILL verdict on your side project based on traction and market signal.
- VC vs Stay Solo — Dilution Calculator Take the cheque or stay bootstrapped? Model what each funding round leaves you with versus full ownership.
- LLM Vendor Lock-In Cost Engineering, downtime, and payback when migrating between LLM providers.
- Pricing Model Picker Flat monthly, per-seat, usage-based, or hybrid? Compare projected revenue side-by-side.
- Marketplace Listing ROI Net margin and break-even visitor count after a marketplace's listing fee and revenue share.
Freelance and consulting 10
- Freelance Rate + Capacity Planner Set confident rate floors from utilization, overhead, and income targets.
- Hourly to Salary Converter Convert hourly and salary compensation with PTO and overtime adjustments.
- Consulting Day Rate Calculator Calculate your consulting day rate from annual income target, working days, overhead, and tax.
- Project Pricing Calculator Estimate project price from hours, complexity, risk buffer, and discount with effective rate check.
- Freelance Tax Estimator Estimate quarterly tax set-aside from freelance income, expenses, and deductions. Not tax advice.
- Invoice Late Fee & Interest Calculator Calculate late-payment penalties from grace days, fixed fees, and annual-interest terms.
- Scope Creep Cost Calculator Quantify the true cost of scope creep by comparing quoted vs actual hours to reveal your effective rate.
- Salary / Paycheck Calculator Estimate annual and paycheck outcomes with simplified tax assumptions.
- Meeting Cost Calculator What does that recurring meeting actually cost in salary time? Use it to defend deep work.
- Time Zone Overlap Planner Find fair async meeting windows across global contractors with rotation and DST warnings.
Guides by decision area
- AI product economics
Understand the costs, margins, and pricing of building AI-powered products.
- AI vendor pricing
Read AI pricing models by category — per-token, per-GB, per-seat, per-minute — and pick the cheaper vendor.
- Bootstrapped growth
See when cash runs out, what you need to break even, and how to grow without funding.
- Freelance to founder
Set rates, protect margins, and plan the transition from client work to product.
- Marketing and acquisition
Know whether your marketing spend is building value or burning cash.