---
title: "Scientific Calculator — Free Online (sin, cos, log, √, x²)"
description: "Free scientific calculator with powers, roots, sin, cos, tan, logarithms and factorials. Type expressions, choose degrees or radians, and see worked examples."
url: "https://worldcalculators.org/calculators/scientific/"
canonical: "https://worldcalculators.org/calculators/scientific/"
---

# Scientific Calculator

Free scientific calculator with powers, roots, sin, cos, tan, logarithms and factorials. Type expressions, choose degrees or radians, and see worked examples.

## Quick answer

A scientific calculator follows order of operations (PEMDAS / BODMAS): brackets and exponents first, then ×/÷, then +/−. Use it for sin, cos, tan, log, ln, √, and powers. Set the angle mode to match your task — degrees are standard for everyday geometry, while radians are used in calculus and most scientific work worldwide.

## How to Use

Use +, −, ×, ÷ for basic operations. Use % for percentages — e.g. 150×20% gives 30.
sin(30), cos(45), tan(60) — switch between Degrees and Radians using the DEG/RAD toggle.

## Scientific calculator questions

Use ^ for a power and sqrt(...) or √(...) for a square root. For example, (2+3)^2 gives 25 and sqrt(144) gives 12. Use brackets around fractional exponents: 27^(1/3) gives 3.
Choose DEG when the angle is given in degrees and RAD when it is given in radians. For example, sin(30) in DEG mode is 0.5, while sin(π/2) in RAD mode is 1.

## Sources & Methodology

Expressions use arithmetic precedence and real-number functions. Multiplication must be explicit (2 * π). Results use browser floating-point arithmetic and display up to 12 significant digits. Values outside the supported range produce an error.

Source: https://worldcalculators.org/calculators/scientific/
Markdown mirror of the HTML page. Prefer this URL for RAG; the interactive calculator still lives on the HTML page.