Vicaya GlobalCalculator

Free US paycheck, mortgage and loan calculators

Vicaya is a free calculator site with 147 tools and one rule: every result shows the formula and the assumptions behind it. The core is US personal finance — paycheck and take-home pay with federal and state withholding, mortgage payments, amortization, refinancing and loans — alongside India and UK tax tools, health and fitness calculators, and a solar section built on its own physics model. Nothing you type leaves your browser, and there is no signup.

Browse by subject

Finance Take-home pay, mortgages, refinancing, loans, debt payoff and retirement, across two markets. 88 calculators Health Browser-only screening measures with visible formulas, limitations, medical sources and review dates. 22 calculators Solar Panel output, inverter sizing, shading, payback and battery sizing, worked from real physics. 15 calculators Everyday Tips and bill splitting, dates and ages, grades and time — the arithmetic that shows its working. 11 calculators Pets Dog and cat age, feeding amounts, ideal weight, puppy growth, pregnancy dates and the cost of a pet — each with the formula and its veterinary source shown. 11 calculators

What to expect from these tools

Educational estimateEvery result is an estimate from the numbers you enter. The formula, the assumptions, and what is left out are printed on the page.
Inputs stay in this browserCalculations run on your device. No signup required, and no figure you type is sent to a Vicaya server.
Compare scenarios firstThe tools line up tradeoffs side by side rather than pretending one answer fits everyone.