Online Calculator

The % operator divides the preceding value by 100. 200 × 10% gives 20. To add 10% to 200, enter 200 × (1 + 10%); the result is 220. In contrast, 200 + 10% gives 200.1.

Basic arithmetic uses exact fractions for decimal inputs. Results show up to 15 significant digits. Rounded results and scientific functions are marked approximate. Continuing basic arithmetic reuses the original expression, not the rounded display. Constants π and e and scientific functions have limited numerical precision.

DEG interprets angles in degrees; RAD uses radians. In DEG mode, sin(30) is approximately 0.5. In RAD mode, sin(pi/2) is approximately 1. Recalculate your expression after changing angle units.

Parentheses are evaluated first. −2^2 equals −4, while (−2)^2 equals 4. 2^3^2 is interpreted as 2^(3^2). Implicit multiplication such as 2(3+4) is supported; use an explicit multiplication sign to avoid ambiguity. Functions require parentheses: sqrt(9), ln(2).

Only real numbers are supported. Division by zero, square roots of negative numbers and undefined functions show an error. Expressions are limited to 512 characters, 200 tokens and 32 nesting levels; individual numbers may have up to 120 digits. Very large intermediate results are rejected. Scientific functions also have browser numerical limits.

Once this page has been opened online and browser caching is ready, it can work offline. Calculations run on your device. The last 20 calculations are stored in this browser and can be deleted with Clear. Private browsing, storage permissions and clearing browser data may affect history and offline access.