How to use the Scientific Calculator
- 1. Pick an angle unitChoose degrees or radians. This matters for sin, cos and tan.
- 2. Build your sumUse the keypad, or type on a keyboard. Brackets and functions are ready.
- 3. Press equalsSee the result. Use Ans to carry it into your next sum.
What each key does
- sin, cos, tan and asin, acos, atan follow the angle unit you chose.
- log is base 10 and ln is base e. So log(1000) = 3.
- √ is square root and ^ is power. So 2^10 = 1024.
- ! is factorial. So 5! = 120.
- % divides by 100. So 200 × 10% = 20.
- Ans holds your last result. After a result, pressing an operator continues from it.
Order of operations
The calculator follows the usual order: brackets, then powers, then multiply and divide, then add and subtract. So 2 + 3 × 4 = 14, and (2 + 3) × 4 = 20.
Powers work from right to left, so 2^3^2 = 2^9 = 512. A leading minus applies after the power, so −2^2 = −4. Write (−2)^2 if you want 4.
You can skip the multiply sign in many places: 2π, 2(3) and 2sin(30) all work. A bracket left open at the end closes itself, so sin(30 gives 0.5 in degrees.
Degrees or radians?
School problems usually use degrees, where sin(30) = 0.5. Engineering and programming often use radians, where a full circle is 2π. If an answer looks wrong, check this setting first.
The calculator tells you when a sum has no real answer, such as the square root of a negative number, log(0), tan(90) in degrees or a division by zero.
For exact fractions, use the fraction calculator. For a data set, use the standard deviation calculator.
Frequently asked questions
Why is my sin answer wrong?
Check the angle unit. sin(30) is 0.5 in degrees but about −0.988 in radians.
Is log base 10 or base e?
log is base 10 and ln is base e.
Does the calculator send my sums anywhere?
No. Every sum runs in your browser.
Is this calculator free?
Yes. The keypad is free to use. The first time you press equals, it asks for your name and WhatsApp number once. After that it runs without any form.