Scientific Calculator
Type or tap an expression and press equals — every calculation lands on the tape, so your working is always visible.
How to use it
Type expressions directly — the display is a real text field, so the keyboard is the fastest way on a computer: digits, + - * /, parentheses, ^ for powers, and function names like sqrt(16) or sin(30). Press Enter (or =) to evaluate. The buttons cover the same operations for phones and tablets.
Trig works in degrees by default, like a school calculator — switch the deg/rad toggle for radians. log is base 10 and ln is the natural logarithm, following the school convention. The constants pi and e are built in, and ans holds the previous result, so you can chain calculations: after computing something, typing ans * 2 doubles it.
The tape keeps your last 50 calculations with their results — tap any entry to bring the expression back for editing. Results show up to 12 significant digits.
Looking for something more specific? The calculator directory has purpose-built calculators for mortgages, percentages, dates, health metrics and more — each with a transparent step-by-step breakdown.
Results are informational only — not financial, medical or legal advice.