Number Tools
Free online calculators and number utilities. Calculate percentages, age, BMI, loan EMI, discounts, tips, convert numbers to words, and work with Roman numerals — all instantly in your browser.
Percentage Calculator
Calculate percentages, percentage increase/decrease, and percentage-based operations instantly.
Age Calculator
Calculate exact age in years, months, days, hours, minutes, and seconds from any date of birth.
BMI Calculator
Calculate Body Mass Index with category indicators, health reference chart, and metric/imperial support.
Loan / EMI Calculator
Calculate monthly EMI, total interest, total payment, and generate a detailed amortization table.
Discount Calculator
Calculate discount amounts, final prices, savings, and reverse discount calculations.
Tip Calculator
Calculate tip amounts and per-person splits with quick percentage buttons and custom tip options.
Number to Words
Convert numbers up to 999 trillion into written English words with decimal support.
Roman Numeral Converter
Convert between regular numbers (1-3999) and Roman numerals in both directions.
Frequently Asked Questions
Our number tools cover percentage calculations, age calculation from date of birth, BMI calculation with health categories, loan EMI with amortization tables, discount calculations, tip splitting, number-to-word conversion, and Roman numeral conversion.
All calculations use JavaScript's native number precision which is accurate for everyday calculations. For financial calculations like EMI, results match standard financial formulas used by banks.
Yes, all calculators are fully responsive and work on mobile, tablet, and desktop devices with touch-friendly interfaces.