FixThatAppAll Tools
Daily

Online Calculator

Fast calculator for daily math operations with percentage and memory-friendly workflow.

How This Tool Works

The Online Calculator performs standard arithmetic operations — addition, subtraction, multiplication, division — along with percentage calculations. It works entirely in your browser with no installation required, making it available on any device with internet access. Use it for quick arithmetic when you don't have a physical calculator or want to verify a calculation.

How to Use

  1. Enter the first number in field A.
  2. Enter the second number in field B.
  3. Click Run for basic arithmetic. The result is shown immediately.
  4. For percentages: enter the percentage value and the base — the percentage amount is calculated.

Common Questions

What order of operations does this calculator use?

Standard mathematical order of operations (BODMAS/PEMDAS): brackets first, then exponents, then multiplication and division left-to-right, then addition and subtraction left-to-right.

How do I calculate a percentage increase?

Percentage increase = ((New Value − Old Value) ÷ Old Value) × 100. For a dedicated percentage tool with more calculation modes, use the Percentage Calculator.

What is the maximum number this calculator can handle?

JavaScript numbers use 64-bit floating point (IEEE 754), which handles numbers up to approximately 1.8 × 10^308. For integers, precision is exact up to 2^53 (about 9 quadrillion). Beyond this, results may be rounded.