How do I switch between degrees and radians?

Press the DEG/RAD key at the top-left of the keypad. The current mode is shown on the display. In DEG mode, sin(90) = 1; in RAD mode, sin(π/2) = 1.

How do I calculate powers and roots?

Use x² for squares, ^ for any power (2^10 = 1024), √ for square roots, and ⁿ√ for other roots — it types root( and takes two inputs: root(3, 27) is the cube root of 27, which equals 3.

ANS inserts the result of your previous calculation, so you can chain steps: after 6 × 7 = 42, pressing ANS + 1 = gives 43.

How do I use the inverse trig functions?

sin⁻¹, cos⁻¹ and tan⁻¹ compute the angle whose sine, cosine or tangent you enter. The answer comes back in the current angle mode — sin⁻¹(1) is 90 in DEG mode and π/2 ≈ 1.5708 in RAD mode.

What is the difference between log and ln?

log is the base-10 logarithm (log(1000) = 3) and ln is the natural logarithm, base e ≈ 2.71828 (ln(e) = 1). Both are defined for positive numbers only.

Can I type calculations with my keyboard?

Yes — digits, the + - * / ^ % ( ) keys, Enter for equals, Escape to clear, and Backspace to delete all work exactly like the on-screen keys.

How large a factorial can it compute?

Up to 170! — beyond that the result exceeds what standard floating-point numbers can represent, and the calculator reports an error instead of showing an inaccurate value.

科学计算器

DEG

常见问题

How do I switch between degrees and radians?: Press the DEG/RAD key at the top-left of the keypad. The current mode is shown on the display. In DEG mode, sin(90) = 1; in RAD mode, sin(π/2) = 1.
How do I calculate powers and roots?: Use x² for squares, ^ for any power (2^10 = 1024), √ for square roots, and ⁿ√ for other roots — it types root( and takes two inputs: root(3, 27) is the cube root of 27, which equals 3.
What is the ANS key?: ANS inserts the result of your previous calculation, so you can chain steps: after 6 × 7 = 42, pressing ANS + 1 = gives 43.
How do I use the inverse trig functions?: sin⁻¹, cos⁻¹ and tan⁻¹ compute the angle whose sine, cosine or tangent you enter. The answer comes back in the current angle mode — sin⁻¹(1) is 90 in DEG mode and π/2 ≈ 1.5708 in RAD mode.
What is the difference between log and ln?: log is the base-10 logarithm (log(1000) = 3) and ln is the natural logarithm, base e ≈ 2.71828 (ln(e) = 1). Both are defined for positive numbers only.
Can I type calculations with my keyboard?: Yes — digits, the + - * / ^ % ( ) keys, Enter for equals, Escape to clear, and Backspace to delete all work exactly like the on-screen keys.
How large a factorial can it compute?: Up to 170! — beyond that the result exceeds what standard floating-point numbers can represent, and the calculator reports an error instead of showing an inaccurate value.

这是什么科学计算器？

一款免费的在线科学计算器，具备经典卡西欧式计算器的功能：可切换角度/弧度的三角函数、常用对数与自然对数、幂与根、阶乘、常数 π 和 e、括号、百分比、记忆功能，以及调出上一个结果的 ANS 键。

功能说明

三角函数 —— sin、cos、tan 及其反函数。注意 DEG/RAD 指示：角度模式下 sin(90) = 1。
幂与根 —— x² 平方，^ 任意次幂（2^10 = 1024），√ 平方根，ⁿ√ 输入 root(n, x)：root(3, 27) = 3。
对数 —— log 为常用对数（底为 10），ln 为自然对数（底为 e）。
阶乘 —— 5! = 120，最大支持 170!。

键盘操作

数字、+ - * / ^ % !、Enter 等号、Escape 清除、Backspace 删除。

使用限制

约 15 位有效数字；超大结果以科学记数法显示。
未定义的运算会显示清晰的错误提示。