Features
A calculator should be simple to use but capable
underneath. This one keeps a clean face, just a keypad and display, while handling the things serious calculator users actually rely on. Here's what's built
Calculation Behavior
Calculations
Calculations run left to right, the way a standard calculator works, so there's nothing new to learn. The equals key does more than most: press it again and it repeats your last operation, so you can apply the same step to one number after another without re-entering it — See How Equals Key Works
Display
The display shows the expression you're building above the result, so you can see what's being calculated rather than guessing from a single number.
Accuracy and Precision
Digits
The display shows up to 12 digits, You can work in floating-point or switch to a fixed number of decimal places when you need consistent formatting.
Precision
Calculations are carried internally to 16-digit accuracy, so the number you see is backed by more precision than it shows, and results stay reliable.
Math Functions
Basic Four
Addition, subtraction, multiplication and division, The workhorses for most math problems. Clear all, clear entry, and backspace give you precise control when you mistype.
Plus
Square root, square, reciprocal, sign change, and percent are the extra functions that come up in everyday calculation without tipping over into scientific-calculator territory.
Memory Keys
A Full Set
Memory keys, add, subtract, recall, and clear, lets you hold a running value in the background while you work on something else, with a clear on-screen indicator whenever memory is in use — How Memory Keys Work
Stays Put
As long as the Save Work setting is ON (the default), whatever you store in memory is saved in your browser the moment you store it, so it survives closing the tab. Leave a value in memory, come back tomorrow, press
Calculation History
Last 100 Calculations
Your last hundred calculations are saved automatically when the Save Work setting is ON (the default). Open the history panel, click any line, and that result comes straight back to the display so you can keep going from there — More About Calculation History
Remembers Everything
With the Save Work setting ON (the default), your history, your memory, your settings, and even a calculation in progress are all saved to your browser the when they happen. Close the tab and come back later, and everything is where you left it. Prefer a fresh start each time? Turn the Save Work setting to OFF and nothing is kept between sessions — Adjust Calculator Settings
Fits Your Way
Screen
The calculator resizes to fit your screen, works in light or dark mode, and shows plain, clear messages when something isn't valid instead of cryptic errors. Digit grouping makes long numbers readable, with international support for comma and period conventions.
Input
Use the on-screen keypad or type directly from your keyboard. Every keypress gives visual button feedback, so you can work quickly without
losing track of what you've entered. You can copy a result out and paste a value in, so the calculator fits into whatever you're already doing — View Keyboard Shortcuts
Related . . .
