CalcSmith is a free suite of money and health calculators. Each tool shows the exact formula it uses, a worked example, charts, a full amortization or projection schedule, CSV export and a shareable link — with no sign-up. Amounts can be shown in nearly thirty currencies.
Calculators include: Home Loan (Mortgage), Loan Repayment, Compound Interest, Savings Goal, Retirement, Refinance Break-Even, Borrowing Power, BMI, Calorie / TDEE, and Percentage.
CalcSmith requires JavaScript to run interactively. It is part of the AppVitamins fleet of free, privacy-first web tools — see also the Smart Budget planner and the AppVitamins store.