Professional-grade calculators for developers, businesses, and everyday decisions. No sign-up required.
Estimate API costs for OpenAI, Anthropic, Google, and more. Compare pricing across 30+ models.
Describe your AI project — chatbot, code assistant, content generation — and get a full cost estimate across 27+ models.
Calculate monthly mortgage payments with property tax, insurance, and PMI. See the full amortization schedule.
Calculate return on investment, annualized returns, and breakeven timeline. Compare up to 4 scenarios.
Plan a business purchase with SBA loan financing. Cash flow analysis, DSCR, and valuation metrics.
See how your savings grow over time with compound interest, regular contributions, and inflation adjustment.
Visualize how loan payments split between principal and interest. See how extra payments save money.