Calculators, converters, generators and more. Precise, fast and free tools for individuals, students and professionals.
Calculators, financial conversions and digital tools
Trigonometric functions, logarithms, powers and calculation history
Calculate your monthly payments, interest and loan amortization
Quickly calculate the ideal tip and split the bill between friends
Estimate your annual carbon footprint and discover how to reduce it
Calculate your body mass index and ideal weight in metric or imperial
Calculate sale prices, savings, margins and reverse-calculate original prices
Units of measure, weight, volumes and numerical conversions
Convert km, meters, inches, yards, miles, feet and light-years
Convert pounds, kg, liters, gallons, cups and more
Binary, hexadecimal, octal, decimal and file size conversions
Convert between 24 world currencies with real-time exchange rates
Convert between Celsius, Fahrenheit, Kelvin, Rankine and 4 more units
Convert m², hectares, acres, square feet and real estate references
Time zones, calendars and date calculations
Generators, encoders and text manipulators
Generate ultra-secure customizable passwords in one click
Count words, characters, sentences and estimate reading time
Transform your text to UPPERCASE, lowercase, CamelCase, snake_case...
Create QR codes for URLs, text, email or phone in seconds
Measure your typing speed in words per minute (WPM) and accuracy
Convert HEX, RGB, HSL, HSB and analyze WCAG accessibility contrast
Before using a tool, understand what you're calculating. Our guides give you the keys to interpret your results: how to read a BMI, the subtleties of a Belgian mortgage, why an 8-character password is no longer enough.
Fixed vs. variable rate, duration, loan-to-value, notary fees, outstanding balance insurance: everything a Belgian buyer should understand before signing.
The Body Mass Index is useful but often misinterpreted. Origins, calculation, limits, alternatives: an educational guide for adults.
Why 8 characters are no longer enough, how to measure entropy, and why a password manager is now essential.
OmniTools brings together more than twenty online tools carefully designed for everyday situations. Whether you want to simulate a mortgage before a real-estate purchase, convert a foreign currency before a trip, quickly generate a strong password, check your body mass index, or convert temperature units for a recipe, you will find a reliable tool here — free, no sign-up required.
Every tool is built in-house, with verified formulas and official references (WHO, standard SI units, widely-used mortgage models). Results are calculated directly in your browser: no figure, no password, no text is sent to a server. This approach guarantees maximum privacy and instant response times, even on slow mobile networks.
Our team publishes new tools every month based on real needs reported by our community. Each tool comes with an educational section explaining formulas, units and common use cases, so you understand what you calculate rather than just copying a number.
We have built OmniTools around four non-negotiable principles: genuine free access (no hidden paid tier), strict privacy (no data sold or shared), verified accuracy (cross-checked against references) and universal accessibility (responsive, lightweight, works on any device). Hundreds of thousands of calculations have already been performed through our platform by students, freelancers, real-estate professionals and curious users worldwide.
If you are missing a specific tool, let us know — we read every message sent through the contact form and we regularly prioritize community-requested additions. Welcome to a faster, cleaner, more respectful web.