Scientific calculator
Powers, roots, logs, sin, cos and tan in degrees or radians, factorials and nCr, with exact answers and the sum drawn as a textbook would. Free, with no account or uploads.
A scientific calculator that shows its reading
Type or press a sum. The answer is exact where it can be, and the sum is drawn as a textbook would draw it.
Press = or Enter and the answer shows here, with how the sum was read.
Tape
Every answer is listed here. Press one to use it again; GT adds them all up.
A rounded answer is worked out to 60 digits and shown to this many.
Read with one rule for what calculators disagree on: things written side by side multiply like ×, from left to right, so 6 ÷ 2(1 + 2) is 9; −2² is −4; and a function without brackets takes only what follows it. The answer says so whenever a sum is one of these.
A little help along the way
Follow these steps. Every option is explained underneath. Everything is worked out in your browser; nothing is sent anywhere.
- Type or press a sumType with your keyboard, paste a sum, or press the keys. The answer shows quietly under the sum as you type.
- Press = or EnterThe answer is shown large, with whether it is exact, and the sum drawn as a textbook would draw it.
- Carry on or start againPress an operator to carry the answer on as Ans, or a number to start a new sum. AC clears the sum.
- Use the tapeEvery answer is listed on the tape. Press one to use it again, or GT to add them all up.
Questions people ask
- Does it use degrees or radians?
- Degrees to start with, as most school calculators do. Press Deg to switch to radians; the display says which is in use. In degrees, sin 30 is exactly 0.5; in radians, sin(π) is exactly 0.
- What is 6 ÷ 2(1 + 2)?
- It gives 9: things written side by side multiply like ×, worked from left to right, which is how most calculators and maths software read it. Some calculators, Casio's among them, multiply first and give 1, so the answer says so whenever a sum is one of these and draws the sum as a fraction to show how it was read.
- Can it work out 100 factorial?
- Yes, in full: all 158 digits, with its size as 9.33 × 10¹⁵⁷. Factorials up to 10,000! are written out exactly; larger ones and factorials of decimals are worked out with the gamma function to 60 digits.
- How many digits are the answers right to?
- Answers that are fractions stay exact. The others are worked out to 60 significant digits and shown to 12, or as many as you choose up to 30 under More options, so the last digit shown is right.
This page is the Calculator, opened for this one job; every other tool it has is one press away. Each of its settings is explained on the Calculator's own page.
Read the step-by-step guide