Calculators: 5 Free Online Tools
These calculators cover everyday number problems: working out an exact age, adding or removing tax from a price, estimating a loan repayment, handling discounts and margins, and converting units or currencies.
Each one runs in your browser, so you can try different inputs quickly without creating an account.
Who it is for: Students, shoppers, small business owners, accountants and anyone comparing prices, taxes or loan offers.
Tools in this category
Age Calculator
Find your exact age in years, months, days and hours from a birth date, see next-birthday countdown and more life statistics. Runs in your browser.
Good for: general users, students, form fillers.
GST & VAT Calculator
Add or remove GST, VAT or sales tax from a price, handle quantity and discounts, and see the CGST/SGST split for Indian invoices. Free and browser-based.
Good for: small business owners, shopkeepers, accountants.
Home & Car Loan EMI Calculator
Estimate monthly EMI, total interest and a full amortization schedule for home or car loans, test part-prepayments and export the result as CSV or PDF.
Good for: loan applicants, home and car buyers.
Percentage Calculator
Eleven percentage calculators in one page: discount, GST/VAT, profit margin, markup, reverse percentage, compound interest, tip split and more.
Good for: students, shoppers, small businesses.
Unit & Currency Converter
Convert length, weight, temperature, area, speed and more, plus live currency and crypto rates. Includes a scientific calculator. Rates need an internet connection.
Good for: students, engineers, travellers.
Privacy, processing and limits
- Results are estimates for planning. They are not financial, tax or legal advice, and your bank, tax authority or invoicing rules may differ.
- The Unit & Currency Converter asks a third-party exchange-rate service for current rates, so that part needs an internet connection. The amounts you type are used for the calculation in your browser.
See the privacy policy for how the site itself handles data.