Finance & Tax Calculators

Calculate loan payments, total interest, and amortization schedule

Free compound interest calculator with monthly contributions. Calculate investment returns, compare compound frequencies, and visualize your wealth growth over time.

Free dollar-cost averaging (DCA) calculator. Enter periodic contribution amounts and a price history to compute total invested, average cost, final portfolio value, and ROI. Works for stocks, crypto, and funds.

Free retirement calculator. Project your nest egg from current age, savings, monthly contributions, and expected return. See inflation-adjusted retirement income and a year-by-year growth table.

Free online VAT calculator. Add VAT to a net price or extract VAT from a gross (tax-inclusive) price. Includes country presets for Thailand, UK, EU and custom VAT rates. Instant, 100% client-side.

Calculate taxes based on income and rates

Solve the annualized return of irregular cash flows with dates — SIP plans, private deals, dividend streams — with Newton and bisection XIRR solving, a classic IRR cross-check, totals and a contribution-weighted chart. Runs in your browser.

Compare leasing vs buying a car from price, down payment, trade-in, APR, money factor, residual value and fees, with payment breakdowns and a total-cost verdict. Pure client-side math.

Estimate the home-office tax deduction with the simplified per-square-meter method and the actual-expense method side by side — office share of rent, utilities, insurance and maintenance plus equipment, with a verdict and savings. Pure client-side math.