Calculators · FREE

Online Calculator: Basic and Scientific

Perform everyday arithmetic calculations. Processing for supported tools happens locally in your browser.

About Basic Calculator

Use this browser-based utility for everyday tasks. Review output before relying on it and retain a copy of important originals.

Read the Basic Calculator guide →

About Basic Calculator

A basic calculator is useful for quick arithmetic while shopping, studying, planning a budget or checking a value. Enter the expression carefully and verify important calculations independently.

How to use Basic Calculator

  1. Enter the first number and choose an arithmetic operation.
  2. Enter the next number, then continue with the expression you need.
  3. Use the clear control to remove an incorrect entry and start again.
  4. Review the displayed result and the order of operations for expressions with more than one operator.
  5. Copy or write down the result if you need it elsewhere.

Where a calculator is not enough

For money, tax, measurements or anything with consequences, check the figures again, and keep a note of each step so that you can see where a mistake came in. For repeated calculations, tables or totals of many numbers a spreadsheet is a better tool because every number is visible and can be changed later. The Percentage, Discount and Loan calculators handle common tasks that need more than one step.

Frequently asked questions

Does a basic calculator replace a spreadsheet?

No. It is intended for quick arithmetic, while spreadsheets are better for repeated calculations, tables and audit trails.

Why does 2 + 3 × 4 equal 14?

Multiplication is normally evaluated before addition. Use parentheses if you intend a different order.

Does it replace a spreadsheet?

No. It is for quick arithmetic. A spreadsheet is better for many numbers and for calculations you will repeat.

Why does 10 divided by 3 show 3.33?

The result is rounded to two decimal places for display.

More Calculators tools

Want more detail, examples and answers to common questions? Read the Basic Calculator guide.

About Basic Calculator

A basic calculator is useful for quick arithmetic while shopping, studying, planning a budget or checking a value. Enter the expression carefully and verify important calculations independently.

How to use Basic Calculator

  1. Enter the first number and choose an arithmetic operation.
  2. Enter the next number, then continue with the expression you need.
  3. Use the clear control to remove an incorrect entry and start again.
  4. Review the displayed result and the order of operations for expressions with more than one operator.
  5. Copy or write down the result if you need it elsewhere.

Where a calculator is not enough

For money, tax, measurements or anything with consequences, check the figures again, and keep a note of each step so that you can see where a mistake came in. For repeated calculations, tables or totals of many numbers a spreadsheet is a better tool because every number is visible and can be changed later. The Percentage, Discount and Loan calculators handle common tasks that need more than one step.

Frequently asked questions

Does a basic calculator replace a spreadsheet?

No. It is intended for quick arithmetic, while spreadsheets are better for repeated calculations, tables and audit trails.

Why does 2 + 3 × 4 equal 14?

Multiplication is normally evaluated before addition. Use parentheses if you intend a different order.

Does it replace a spreadsheet?

No. It is for quick arithmetic. A spreadsheet is better for many numbers and for calculations you will repeat.

Why does 10 divided by 3 show 3.33?

The result is rounded to two decimal places for display.

More Calculators tools

Want more detail, examples and answers to common questions? Read the Basic Calculator guide.