Online Calculator

Free Online Scientific Calculator

This calculator supports basic arithmetic and scientific calculations. All data is processed locally in your browser — nothing is uploaded to any server, fully protecting your privacy.

Features

• Basic arithmetic: addition, subtraction, multiplication, division, percentage
• Scientific calculations: trigonometry, logarithms, exponents, powers, factorials
• Hyperbolic functions: sinh, cosh, tanh
• Inverse trigonometric functions: asin, acos, atan
• History: saves up to 50 calculations with favorites
• Dual themes: flat/skeuomorphic style toggle
• Pure frontend offline processing, protects user privacy

How to Use

1. 1Select Basic or Scientific mode
2. 2Click buttons or use keyboard to enter expressions
3. 3Press = or Enter to calculate
4. 4View or recall previous calculations from History