Math Calculators

Basic arithmetic, scientific functions, and percentage calculations in your browser.

Everyday arithmetic, percentages, and scientific functions without installing an app — useful for homework, work, and quick checks.

Math calculators on financecalc cover basic four-function math, percentage problems, and scientific operations such as trigonometry and logarithms. Everything runs locally in the page so your inputs stay private.

Use the basic or scientific keypad when you need a general calculator. Use the percentage tool when you need “X% of Y,” part-to-whole, or percent change — those are the questions people mis-key most often on a phone keypad.

Each calculator page explains the operations briefly and includes tips for common mistakes (for example, percent change versus percentage points).

If you are writing about rates or polls, read the percent change versus percentage points guide so relative and absolute language stay clear.