All Tools — 23 Free Online Calculators & Generators

Finance & Money

Calculators for GST, EMI, SIP and interest so you can plan money decisions with real numbers instead of guesswork.

GST Calculator

Free GST calculator for India.

Loan EMI Calculator

Calculate your monthly loan EMI, total interest and total payment for home, car or personal loans using the standard reducing-balance formula.

SIP Calculator

Estimate the future value of your monthly SIP mutual fund investment.

Compound Interest Calculator

Calculate compound interest on any principal amount with yearly, half-yearly, quarterly or monthly compounding, and see the total interest earned.

Health & Fitness

Everyday health calculators for age, BMI, BMR and TDEE — quick estimates, explained in plain language.

Age Calculator

Calculate your exact age in years, months and days from your date of birth, plus total days lived and a countdown to your next birthday.

BMI Calculator

Calculate your Body Mass Index (BMI) from height and weight in metric or imperial units, and see which BMI category you fall into.

BMR and TDEE Calculator

Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor formula, based on age, sex, height, weight and activity level.

Everyday & Math

General-purpose calculators and converters for percentages, units, numbers and bases.

Percentage Calculator

Calculate percentages instantly — find X% of a number, what percentage one number is of another, or the percentage increase or decrease between two values.

Random Number Generator

Generate one or many random numbers within any range, with or without duplicates — useful for raffles, sampling, games and testing.

Length Unit Converter

Convert length and distance instantly between millimetres, centimetres, metres, kilometres, inches, feet, yards and miles.

Binary Decimal Converter

Convert numbers instantly between binary, decimal, hexadecimal and octal — a quick base converter for students and developers.

Text Tools

Tools for writers, students and editors — counters, case converters and diff checkers that run entirely in your browser.

Word Counter

Count words, characters, sentences and paragraphs in real time, plus estimated reading time — free online word counter for writers and students.

Character Counter

Count characters with and without spaces in real time — perfect for meeting tweet, SMS, meta description or bio character limits.

Text Case Converter

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case instantly.

Text Diff Checker

Compare two blocks of text side by side and instantly see the added, removed and changed lines — a free online diff checker.

Lorem Ipsum Generator

Generate classic Lorem Ipsum placeholder text by paragraphs, sentences or words — free for mockups, design layouts and testing.

Developer Tools

Encoding, formatting and ID-generation utilities developers reach for daily.

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 back to plain text instantly, right in your browser — no upload, no server round-trip.

URL Encoder/Decoder

Encode text or full URLs for safe use in query strings, or decode percent-encoded URLs back to readable text, instantly in your browser.

UUID Generator

Generate random Version 4 UUIDs (GUIDs) instantly, one at a time or in bulk — free online UUID generator for developers.

JSON Formatter

Format, beautify, minify and validate JSON online.

Generators

Generate QR codes, barcodes and strong passwords in one click.

All Free Online Tools