Does it do trigonometry in degrees and radians?

Yes. There is a DEG and RAD toggle that changes how sin, cos and tan read your angle. Set it before you enter a trig function. In degrees, sin(30) is 0.5; in radians, sin(π/6) is 0.5. The mode you are in is shown so there is no guessing.

How do I use the memory keys?

M+ adds the current answer to memory, M− subtracts it, MR recalls the stored value into your expression, and MC clears it. Memory is handy for holding a running subtotal while you work on another part of a calculation.

Can I type with my keyboard instead of clicking?

Yes. Digits, operators, brackets and the dot all work from the keyboard, Enter evaluates, and Backspace deletes. You can mix typing and tapping freely, which is faster for long expressions.

Does this work offline and is anything sent to a server?

The calculation runs entirely in your browser, so nothing you type is sent anywhere, and once the page has loaded it keeps working with no connection. There is no sign-up and no limit on how many calculations you make.

Scientific Calculator

A full scientific calculator with powers, roots, sin, cos and tan in degrees or radians, log and ln, π and e, factorial, percentages and memory. Type with the keypad or your keyboard, and every result is kept in a history list you can reuse. Free and instant.

Exact, step-by-step answers
100% free
No sign-up, no app
Instant as you type
Works offline after first load

Read the guide: Order of Operations (PEMDAS)

M: 0

How to use it

1
Build the expression

Tap the keypad or type on your keyboard. Use parentheses, powers, roots and functions like sin, log and √ to write the whole expression.
2
Switch degrees or radians

Toggle DEG and RAD before using a trig function, so sin, cos and tan read your angle the way you mean it.
3
Read and reuse

Press equals to get the answer. It drops into the history list, so you can click an earlier line to use it again.

When it comes in handy

Homework and exams

Work through trigonometry, powers and roots when you do not have a physical scientific calculator to hand.

Quick technical sums

Evaluate an expression with brackets and functions in one go, rather than chaining a basic calculator.

Checking your working

Confirm an answer you got by hand, with the full expression visible so a mistake is easy to spot.

Instant, exact & 100% in your browser

The maths runs right here in your browser, with fractions and whole numbers kept exact rather than rounded along the way. Nothing you type is sent to a server, there is no sign-up and no limit, and once the page has loaded it keeps working even with no connection.

Frequently asked questions

Does it do trigonometry in degrees and radians?: Yes. There is a DEG and RAD toggle that changes how sin, cos and tan read your angle. Set it before you enter a trig function. In degrees, sin(30) is 0.5; in radians, sin(π/6) is 0.5. The mode you are in is shown so there is no guessing.
How do I use the memory keys?: M+ adds the current answer to memory, M− subtracts it, MR recalls the stored value into your expression, and MC clears it. Memory is handy for holding a running subtotal while you work on another part of a calculation.
Can I type with my keyboard instead of clicking?: Yes. Digits, operators, brackets and the dot all work from the keyboard, Enter evaluates, and Backspace deletes. You can mix typing and tapping freely, which is faster for long expressions.
Does this work offline and is anything sent to a server?: The calculation runs entirely in your browser, so nothing you type is sent anywhere, and once the page has loaded it keeps working with no connection. There is no sign-up and no limit on how many calculations you make.