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Scientific calculator

A scientific calculator with trigonometry, logarithms, powers, roots, memory and history that works with your keyboard.

DEG

Keyboard: type the expression, Enter = equals, Esc = clear. Implicit multiplication works (2π, 3(4+5)), −2² = −4, and 50 + 10% = 55.

Runs in your browser · no uploadHow it works

How to use Scientific calculator

  1. 1

    Choose degrees or radians

    Tap DEG to switch the angle unit before using trigonometric functions.

  2. 2

    Enter the expression

    Use the keypad or your keyboard; press 2nd or hyp for inverse and hyperbolic functions, and watch the live preview.

  3. 3

    Finish and reuse

    Press = or Enter, then copy the result, use Ans in the next calculation, or tap an earlier line in the history.

Limits and Pro

Free and unlimited: 50-entry history, one memory register, about 15 significant digits of double-precision accuracy (12 shown), factorials up to 170!.

About Scientific calculator

A full scientific calculator that works with the keypad, the keyboard or both. Type a whole expression such as 2(3 + 4)² − √81 and see the answer preview as you go; press = or Enter to finish, and the calculation moves into a history list where one tap puts the expression or its result back into the editor. Ans recalls the last answer, and the memory keys add to, subtract from, recall and clear a stored value that survives a page reload.

The keypad covers trigonometry in degrees or radians — sin, cos and tan, their inverses with 2nd, and the hyperbolic versions with hyp — natural, common and base-2 logarithms, powers and roots of any order, squares, cubes and reciprocals, factorials (including non-integers through the gamma function, so 0.5! works), combinations and permutations, modulo, absolute value, a random number, π and e, and EXP for entering numbers in scientific notation.

Expressions are read with the standard order of operations rather than left to right: powers before multiplication and division, multiplication before addition, a leading minus applied after the power so −2² is −4, and stacked powers evaluated from the top down. Implicit multiplication such as 2π or 3(4 + 5) is understood, missing closing brackets at the end are added for you, and percent follows the shopping convention where 80 − 15% is 68. Results show up to 12 significant digits using double-precision arithmetic, so extremely large integers lose their last digits; errors such as dividing by zero or taking the log of a negative number are explained in words instead of showing NaN.

Privacy

Every calculation runs in your browser with a built-in expression parser; nothing you type is sent anywhere. Your history, memory value and angle setting are kept only in this browser's local storage.

Features

Proper order of operations

Powers, roots and implicit multiplication evaluated the way textbooks expect.

History and memory

Tap past calculations to edit them; M+, M−, MR and MC keep a running total.

Keyboard friendly

Type expressions directly, Enter to evaluate and Esc to clear.

Scientific calculator: frequently asked questions

How do I calculate sin, cos or tan in degrees?
Make sure the angle key reads DEG, then enter the function and the angle: sin(30) gives 0.5 and tan(45) gives 1. Tap the key to switch to RAD for radians, where sin(π/6) is also 0.5. Inverse functions work the same way after pressing 2nd — sin⁻¹(1) returns 90 in degree mode or about 1.5708 in radian mode.
What order does the calculator do operations in?
Standard mathematical precedence, often remembered as PEMDAS or BODMAS: brackets, then powers and roots, then multiplication and division, then addition and subtraction. So 2 + 3 × 4 is 14, not 20. A minus sign in front applies after the power, giving −2² = −4, and stacked powers are done top-down, so 2^3^2 equals 2^9, which is 512.
How do I use nCr and nPr?
Type the total, press nCr or nPr, then type how many you choose. 5 nCr 2 is 10 — the number of ways to pick two items from five when order doesn't matter — and 5 nPr 2 is 20 when order does matter. The chance of matching six numbers in a 6-from-49 lottery is 1 in 49 nCr 6, which is 1 in 13,983,816.
How does the percent key work?
On its own a percentage is divided by 100, so 10% is 0.1 and 50 × 10% is 5. After plus or minus it is taken as a share of the number before it, as on phone calculators: 50 + 10% gives 55 and 80 − 15% gives 68. Use brackets if you want a different meaning, such as 50 + (10%) for 50.1.
What does the EXP key do?
EXP enters a power of ten for scientific notation: typing 6.022 EXP 23 means 6.022 × 10²³, and 1.6 EXP −19 means 1.6 × 10⁻¹⁹. Very large or very small answers are shown the same way, with an E before the exponent — for example 2^60 appears as 1.1529215046E18 — so they fit the display without losing significant digits.

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