55+ tools ยท Instant ยท Private ยท Free
Calculators & converters built for real work
SIP, EMI, BMI, GST, Markdown, currency, JSON and dozens more โ all run in your browser. No account. No install. Clear results in seconds.
Popular
BMI Calculator
Body Mass Index
HotAge Calculator
Exact age in years, months, days
HotCurrency Converter
Live exchange rates
HotCrypto Converter
BTC, ETH to fiat
HotInvoice Generator
Any currency ยท Print PDF
HotSIP Calculator
Mutual fund SIP returns
HotCalorie & BMR Calculator
Daily calories (Harris-Benedict)
HotMarkdown Editor
Live preview editor
All tools (55)
Percentage Calculator
Calculate percentages
NewDiscount Calculator
Sale price calculator
NewSalary Calculator
Annual to hourly
NewHeight Converter
Feet to CM
NewJSON Formatter
Format & validate JSON
Unit Converter
Length, weight, temp
Image Converter
JPG, PNG, WEBP
Roman Numerals
Roman โ Decimal
Simple Interest
Interest calculator
Compound Interest
Investment growth
Color Converter
HEX, RGB, HSL
Text Tools
Case, count, transform
Lorem Ipsum
Dummy text generator
Aspect Ratio
Screen dimensions
Binary Translator
Text โ Binary
Number Base
Binary, Hex, Decimal
File Size
Bytes to TB
Date Calculator
Days between dates
World Clock
Global time zones
Translator
50+ languages
GST Calculator
India GST rates
Profit Calculator
ROI & margin
One-Time Link
Self-destruct message
Text to Speech
Listen to text
QR Code Generator
Create QR codes
Password Generator
Secure passwords
Stopwatch
Timer & stopwatch
Energy Converter
Joule, kWh, Calorie
Power Converter
Watt, HP, kW
Pressure Converter
Bar, PSI, Pascal
NewBase64 Encoder
Encode & decode
NewHash Generator
SHA-256, SHA-512
NewUUID Generator
Random UUID v4
NewURL Encoder
Encode & decode URLs
NewEMI Calculator
Loan EMI
NewTip Calculator
Split bill & tip
NewLoan Affordability
How much loan can you get?
NewCGPA to Percentage
10-point CGPA converter
NewUnix Timestamp Converter
Epoch โ date
NewJWT Decoder
Decode JSON Web Tokens
NewCase Converter
camelCase, snake_case, Title Case
NewCountdown Timer
Days until any date
NewWord Counter
Words, chars, reading time
NewMarkdown to HTML
Convert MD to HTML
NewHTML to Markdown
Convert HTML to MD
NewMarkdown Table Generator
Build MD tables visually
NewMarkdown Cheatsheet
Syntax reference & copy
Why AllConvertor?
AllConvertor is a free collection of 55+ online calculators and converters for finance, health, developers, writers, and everyday tasks. Every tool is built to load fast, work on mobile, and keep your data in the browser whenever possible โ no account wall, no install, no trial countdown.
Looking for India-focused calculators? Start with the SIP calculator, EMI calculator, GST calculator, or loan affordability tool. Developers can jump to JSON formatter, JWT decoder, and Markdown editor.
- โFree forever โ ad-supported, no paywall
- โWorks offline-friendly after first load for many tools
- โSEO-friendly pages with guides and FAQs
- โClean light interface built for clarity
Guides & blog
View all โBMI Calculator Guide: How to Calculate and Read BMI
Learn how BMI is calculated, what the WHO categories mean, where BMI falls short, and how to use a free BMI calculator wisely.
EMI vs Simple Interest: How Loan Interest Works
Understand the difference between EMI (reducing balance) and simple interest, see the EMI formula, and learn how tenure and rate change what you pay.
Markdown vs HTML: Which Should You Use?
Compare Markdown and HTML for blogs, docs and READMEs. Learn when each wins, how conversion works, and how to switch between them safely.