Free startup & developer tools
Use these calculators and planning tools to estimate software costs, SaaS metrics and technology choices.
AI API Cost Calculator
Estimate monthly model API costs from input and output token usage.
Use tool →Startup Cost Calculator
Estimate monthly and annual software infrastructure costs.
Use tool →SaaS MRR Calculator
Calculate monthly recurring revenue and annual recurring revenue.
Use tool →SaaS Churn Calculator
Calculate monthly customer churn and retention.
Use tool →SaaS LTV Calculator
Estimate customer lifetime value using ARPU, margin and churn.
Use tool →SaaS CAC Calculator
Calculate customer acquisition cost from sales and marketing spend.
Use tool →Stripe Fee Calculator
Estimate payment processing fees and net revenue.
Use tool →Token Cost Calculator
Estimate LLM costs from input and output token pricing.
Use tool →Bandwidth Calculator
Estimate monthly bandwidth from visitors, page views and page size.
Use tool →Tech Stack Generator
Get a practical starting architecture for your product.
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