Calculators

Common percentage, increase, decrease and tip math.

Calculate days, months and years between two dates.

Split bills with custom tip percentages between people.

Exact age in years, months and days plus next-birthday countdown.

Generate Fibonacci sequence values instantly for algorithm practice and quick checks.

Check if an integer is prime and inspect a factor for composite numbers.

Compute greatest common divisor and least common multiple for two integers.

Add, subtract, multiply and divide fractions with simplified output.

Compute mean, median and mode for comma-separated numeric lists.

Calculate duration between two HH:MM timestamps quickly.

Calculate width/height values while preserving a target aspect ratio.

Evaluate AND, OR, XOR, NOT, and shift operations at 8/16/32/64-bit width, with results in decimal, hex, binary, and octal.