Free Online Financial Calculator: Mortgage, Income Tax, VAT, Loan Payment & Unit Converter in One
A smart financial & health computing platform for individuals and enterprises. Mortgage, tax, loan, unit conversion, body metrics and nutrition — computed locally, securely, instantly, visually.
Mortgage
Commercial / fund / combined mortgages, equal installment or equal principal, full amortization schedule.
Tax
Personal income tax (progressive), year-end bonus and VAT (general / small-scale), inclusive & exclusive.
Loan
A universal loan calculator for monthly payment, interest and total cost across consumer & business loans.
Converter
Length, weight, area, volume, temperature and speed — instant conversion with metric, imperial and traditional units.
Body Metrics
BMI, BMR/TDEE, body fat & lean mass, and waist-to-hip ratio in one place, with instant metric/imperial switching.
Nutrition
Daily calorie targets for fat loss or muscle gain, protein/carbs/fat grams (incl. keto), and water intake by body weight.
Calculator
A high-end four-function calculator with percentage, sign toggle and full keyboard support, thousand-separated results, all local.
Local · Secure
Data-Safe
Enterprise-grade
Engineering
Sci-Tech design
Design
Fully responsive
Responsive
FinCompute is a free online financial calculator for individuals and small businesses, bringing a mortgage calculator, income tax calculator, VAT calculator, loan monthly-payment calculator and length/weight/area/volume/temperature/speed unit converters into one fast, multilingual, privacy-friendly web app that returns a trustworthy number in seconds, with no sign-up and no tracking.
Free mortgage, tax, VAT, loan & unit converters for everyday decisions
Mortgage: compare commercial, provident-fund and combined loans, both repayment methods, plus early-payoff scenarios. Tax: estimate monthly personal income tax under cumulative withholding, compare year-end bonus options and convert VAT. Loan: model consumer and business loans. Converter: convert length, weight, area, volume, temperature and speed across metric, imperial and traditional Chinese units.
Online financial calculator runs locally — no data leaves your device
Every calculation runs in JavaScript inside your own browser. There is no backend, no analytics SDK and no cookie-based tracking. The salary, loan amount and other figures you type never touch a server — you can even use the app fully offline once it has loaded.
Multilingual calculator in six official UN languages
The interface and all explanatory content are fully localized into Simplified Chinese, English, Spanish, French, Russian and Arabic, with right-to-left (RTL) layout automatically enabled for Arabic. Whether you are in Beijing, New York, Mexico City, Paris, Moscow or Riyadh, FinCompute speaks your language.
Charts, amortization schedule & CSV export — no sign-up required
Beyond raw numbers, FinCompute renders principal/interest breakdowns, trend lines and tax-bracket tables so the math becomes intuitive. Amortization schedules can be exported to CSV, ready to open in Excel or share with a loan officer or family member — all features work without registration.
All Tools Directory →
Browse every calculator and converter on FinCompute in one place — financial, scientific, graphing, unit conversion, body metrics and nutrition — all free, private and instantly usable in your browser.
Financial Calculators →
Free, private online calculators for mortgage, tax and general loans — with full repayment schedules, visual charts and CSV export, all in your browser.
Unit Converters →
Convert length, weight, area, volume, temperature and speed across metric, imperial and Chinese units. Type once, see every unit at once — free and private.
Health Calculators →
Free, private online calculators for BMI, BMR/TDEE, body fat, waist-to-hip ratio, calorie targets, macronutrients and water intake — all in your browser, metric & imperial.
FAQ
QIs FinCompute really free? Do I need to register?
Yes, every tool is 100% free. There is no account, no login, no email required. CSV export and calculation history work out of the box; history is stored only in your own browser.
QWill the numbers I enter be uploaded?
No. All math runs locally in the browser. The site has no data-collection endpoint and no third-party analytics. You can disconnect from the internet after the page loads and everything still works.
QWhich languages are supported?
Six: Simplified Chinese, English, Spanish, French, Russian and Arabic. Switch anytime from the language menu at the top; Arabic automatically switches the layout to right-to-left.
QCan I use the results for an actual loan or tax filing?
For reference and planning only. Banks, tax authorities and provident-fund centers may apply slightly different rounding, day-count or policy rules. Always confirm with the official institution before committing.
QWhy do you offer so many languages?
Financial literacy should not be stopped by a language barrier. We picked six official UN languages so that users around the world can read both the tool and the educational content in their native language.
QDoes it work on mobile?
Yes. The layout is fully responsive on phones, tablets and desktops. Dark mode is the default; light mode is available from the sun/moon toggle at the top.
QHow can I save my results?
The mortgage and loan modules let you export an amortization schedule to CSV. Every calculation is also automatically saved to your local history (bell icon at the top), which you can clear at any time.