Free Online Scientific Calculator - Trig, Log & Percentages
A free online scientific calculator and math solver for students, teachers and professionals. Type or tap a calculation, press equals, and get the answer straight away. No download, no account, no waiting.
Angles for sin, cos and tan are in degrees. Press = to get the answer. Your last calculations stay below the buttons, in this browser only. Everything runs in your browser, no account needed.
Why use this calculator?
Fast: Answers appear as soon as you press equals.
Useful for school and work: As an advanced calculator, it covers everyday arithmetic plus trigonometry, logarithms, powers, roots, factorials and percentages. Students use it as a math solver for homework and math practice: square roots, percentages, fractions as decimals and percents, and the algebra steps explained in the guides below.
Private by design: The maths happens in your browser.
How to use the calculator
Tap the buttons or type the numbers and operators.
For trigonometry, tap sin, cos or tan first, then the angle in degrees, then close the bracket.
For a power, use the x² and x³ buttons or type **. For a percentage, type the number followed by %. For a deeper explanation of sine, cosine and tangent, see Khan Academy's trigonometry course.
Available functions
- Trigonometric: sin, cos, tan, in degrees
- Logarithmic: log (base 10) and ln (natural logarithm)
- Powers and roots: x², x³ and square root
- Constants: π (pi) and e
- Special: factorial (!), reciprocal (1/x) and percentage (%)
Watch: basic trigonometry explained
This short Khan Academy video explains sine, cosine and tangent, the functions this calculator uses for trigonometry. Watch it, then try sin(30) on the calculator above. It should give 0.5.
Watch Basic Trigonometry on YouTube
Maths guides
Algebra
- What is Remainder Theorem? Formula with Example
- Dividing Polynomials by Binomials With Example
- How to Factor Polynomials (With Examples)
- Polynomial Definition and Example | Types of Polynomial
- Basic Algebra Formula | With Example
- Algebraic Fractions: Examples with Answers
- Algebraic Expressions: Types, Operations and Examples
Percent and Decimal
- 1/4 as a Percent and Decimal
- 7/10 as a Percent and Decimal
- 6/7 as a Percent and Decimal
- 5/6 as a Percent and Decimal
- 1/3 as a Percent and Decimal
- 1/2 as a Percent and Decimal
- 7/8 as a Percent and Decimal
- 5/8 as a Percent and Decimal
- 3/5 as a Percent and Decimal
- 1/5 as a Percent and Decimal
- 3/4 as a Percent and Decimal
- 1/8 as a Percent and Decimal
Equivalent Fractions
- What Is Equivalent to 13/17 Fraction?
- What Is Equivalent to 11/17 Fraction?
- What Is Equivalent to 11/13 Fraction?
- What Is Equivalent to 8/9 Fraction?
- What Is Equivalent to 4/7 Fraction?
- What Is Equivalent to 1/7 Fraction?
- What Is Equivalent to 7/9 Fraction?
- What Is Equivalent to 2/9 Fraction?
- What Is Equivalent to 3/4 Fraction?
- What Is Equivalent to 5/7 Fraction?
- What Is Equivalent to 2/3 Fraction?
- What Is Equivalent to 1/3 Fraction?
When should you use an online calculator?
A simple calculator is the quickest choice when you need a correct answer for everyday maths: adding, subtracting, multiplying and dividing, checking a bill, or working out a discount.
Students use it for homework and exam practice. People at work use it for invoices, budgets and quick estimates, without opening a heavy spreadsheet.
If your sum does not need trigonometry or logarithms, a basic answer in seconds is enough. There are no extra steps and no extra features in the way.
Why use an online calculator instead of a physical one?
An online calculator is already in your browser, so you do not need to carry a separate device. You can open it at home, at school, at work, or while travelling.
It needs no batteries, no installation and no download, and its buttons never wear out. The display is large and easy to read.
There is no account to create. Open the page, type your sum, and get the answer straight away, whenever you need it.