Computes the sum of six types of mathematical series: arithmetic, geometric, natural numbers (1+2+…+n), perfect squares, perfect cubes, and custom user-entered values. Each mode displays its closed-form formula and a preview of the first few terms, making it educational as…
Calculates the absolute elapsed time between two date-time points, expressed in weeks, days, hours, minutes, and seconds simultaneously. Large-format time unit cards display the breakdown at a glance, while a secondary panel shows total conversions (e.g. total hours or total…
Computes the future value of an investment with compound interest, supporting five compounding frequencies (annual through daily) and an optional recurring monthly contribution. The result panel includes a three-segment visual bar showing the proportion of principal, contributions, and earned interest…
Calculates final price after applying a percentage discount, with an optional additional tax or fee rate applied on top of the discounted price. Displays a four-cell summary showing how much you save, the raw discount amount, the after-discount subtotal, and…
Calculates cumulative GPA on the standard 4.0 scale used by US universities. Each course row accepts a course name, letter grade (A+ through F, 14 grades total), and credit hours. The result is shown with a visual progress bar and…
Generates one or multiple random numbers within a user-specified range, with options for integer or decimal output, uniqueness enforcement, and sorted output. Results are displayed as individual pill-shaped cards for quick readability. Suitable for games, statistical sampling, lottery draws, and…
Counts the number of business working days between two dates, with configurable weekend exclusion and support for entering custom public holidays. Essential for project planning, SLA tracking, payroll calculation, and any scheduling context where only weekdays matter. Common Use Cases…
Calculates a person’s precise age in years, months, and days from their date of birth to any chosen reference date. Beyond the primary result it also provides total days, months, hours elapsed, and the day of the week on which…
A full-featured scientific calculator offering 18 mathematical functions alongside free-form expression evaluation. It supports both Degree and Radian angle modes, quick-insert function buttons, and live expression parsing — making it suitable for students, engineers, and anyone doing technical calculations. Common…
A versatile percentage utility that handles four distinct calculation modes in a single interface. Whether you need to apply a discount, measure growth, or find a portion of a value, this tool covers every common percentage operation without switching between…