Free Online Tools & Calculators

Calculate exact age in years, months and days, total days lived, age in months and the countdown to the next birthday.

Count visible Unicode characters, characters without whitespace, words, lines and UTF-8 bytes as you type.

Calculate the price after a discount, see how much you save, or find the discount percentage from an original and sale price.

Check authoritative RDAP registration records and get an honest signal—not a guarantee—about whether a domain may be available.

Calculate a percentage of a number, find what percentage one number is of another, or measure percentage change.

Generate one or multiple random integers within any range, with options for unique numbers, sorting and easy copying.

Convert text between uppercase, lowercase, title case, sentence case, alternating case and other common capitalization formats.

Convert common units of length, weight, temperature, area, volume and speed with instant browser-based results.

Count words and paragraphs, estimate reading and speaking time, and track progress toward an optional word goal.

Encode UTF-8 text as standard or URL-safe Base64, and decode Base64 back to readable text entirely in your browser.

Format, minify and validate JSON in your browser without rewriting key order, duplicate keys or exact number text.

Calculate adult body mass index from height and weight using metric or imperial units, with a BMI category and reference weight range.

Estimate daily maintenance calories, basal metabolic rate and simple reference intake ranges from age, sex, height, weight and activity level.

Estimate investment growth, final balance, total contributions and interest earned with compound interest and optional monthly contributions.

Estimate monthly EMI, total interest and total repayment for a fixed-rate loan using the loan amount, annual interest rate and tenure.

Estimate monthly mortgage payments, total repayment, total interest and the effect of optional extra monthly payments.

Calculate profit or loss, profit margin and markup from cost and selling price, or work backwards from a target margin or markup.

Calculate return on investment, profit or loss, and optional annualized return from an initial investment and final value.

Calculate tip amount, total bill and per-person split from a bill amount, tip percentage and number of people.

Generate SHA-256, SHA-384, SHA-512 or legacy SHA-1 digests from UTF-8 text directly in your browser.

Generate strong random passwords in your browser with your chosen length and character types.