Snap Any Conversion
Five powerful free tools for converting anything — units, currency, percentages, dates, and passwords. Results in milliseconds.
What Is ConvertSnap?
ConvertSnap is a free suite of five everyday calculation tools: unit conversion, live currency exchange, percentage calculation, date and age math, and secure password generation. Every tool runs entirely inside your browser — there are no server round-trips, no account creation, and no data storage. Open any page and your answer is ready in milliseconds.
The site was built around one frustration with existing calculator tools: they're slow, cluttered, or ask you to create an account before doing something as simple as converting kilograms to pounds. ConvertSnap removes all of that friction.
Unit Converter: Eight Measurement Categories
The unit converter covers every common measurement category you're likely to encounter:
- Length — inches, feet, yards, miles, centimeters, meters, kilometers
- Weight & mass — ounces, pounds, grams, kilograms, metric tons
- Temperature — Fahrenheit, Celsius, and Kelvin
- Volume — teaspoons, cups, gallons, milliliters, liters
- Speed — mph, km/h, knots, meters per second
- Area — square feet, square meters, acres, hectares
- Digital storage — bits, bytes, kilobytes, megabytes, gigabytes
- Cooking — US and metric cooking measurements
Results update as you type — no button press needed.
Currency Converter with Live Exchange Rates
The currency converter fetches live exchange rates from the European Central Bank, updated each business day, and supports over 170 world currencies. It shows the mid-market rate — the true midpoint between buy and sell prices that you see on Google Finance or Reuters.
Banks and airport kiosks apply a margin of 2–8% on top of this rate, which is their profit on the exchange. Knowing the mid-market rate helps you understand exactly how much you're paying in hidden fees when you exchange money for travel or international payments.
Percentage Calculator: Seven Calculation Modes
Percentages show up in everyday life constantly — tipping at restaurants, calculating sale prices, figuring out tax, tracking investment returns. Our percentage calculator offers seven distinct modes:
- Basic percentage — what is X% of Y?
- Percentage of total — X is what % of Y?
- Percentage change — how much did something grow or shrink?
- Tip calculator with bill splitting
- Discount and sale price finder
- Tax calculator with tax-inclusive total
- Reverse percentage — if X is Y% of a number, what is that number?
Every result includes the step-by-step formula so you can understand the math, not just get the answer.
Date & Age Calculator: Five Date Tools
Date calculations are more complex than they look. Exact age calculation requires accounting for months of different lengths, leap years, and whether this year's birthday has occurred yet. Simply dividing total days by 365 produces a subtly wrong answer.
Our date calculator handles five types of date math: exact age in years, months, and days; total days between two dates (in days, weeks, and months); countdown timers for named upcoming events; business-day calculations that skip weekends; and date arithmetic — add or subtract any number of days from a date to find the resulting day.
Secure Password Generator: Cryptographic Randomness
The password generator uses the browser's crypto.getRandomValues() API — the same Web Cryptography standard used in banking applications and security software. Unlike Math.random(), which uses a predictable algorithm, crypto.getRandomValues() draws from the operating system's true entropy sources.
The tool supports three modes: random character passwords (customizable length and character set), random word passphrases (easier to remember while maintaining strong entropy), and password strength checker (shows entropy in bits and estimated crack time for any existing password).
Why All Calculations Stay in Your Browser
All ConvertSnap tools are implemented in JavaScript and execute entirely on your device. When you enter a value in the unit converter, calculate a tip, or generate a password, that data is processed locally and never transmitted to any server. You can verify this by opening your browser's developer tools and watching the Network tab — there are no outgoing requests during calculation.
This architecture also means the tools load faster (no round-trip latency for each calculation) and work offline once the page is cached by your browser.
Designed for Speed and Clarity
ConvertSnap pages are designed to load quickly and deliver your answer without clutter. Every tool updates results in real time as you type, so there are no loading spinners or submit buttons to click. The interface prioritizes the tool itself — inputs front and center, results immediately visible.
The site works on all devices: desktop, tablet, and mobile. On small screens, the layout stacks into a single column so every input and result is reachable without zooming or sideways scrolling.