Scientific calculator
Type it as you would write it — the answer appears as you go.
DEG
Result
Type with your keyboard too: Enter or = for the result, Backspace to delete, Esc to clear.
History
Your calculations will appear here. They stay in this browser only.
Nothing leaves your device
This tool runs entirely in your browser. What you type, play or record here stays on your device: nothing is uploaded or saved on a server.
Example
Lottery odds, a roof pitch and savings growth: six sums typed as written
Six everyday questions, typed the way they are written, with a comma between a function’s values and the angle unit on DEG.
- nCr counts choices where order does not matter: 5 balls of 69 is 11,238,513 combinations, and with 26 bonus balls the odds are 1 in 292,201,338.
- atan is the inverse tangent: a roof rising 6 inches over 12 has a pitch of about 26.57°. On RAD the same entry shows 0.463647609001, the angle in radians.
- Press = after 10000*1.045^10, then type ans-10000: 5529.69421733, the interest earned.
| Question | Typed | Shown |
|---|---|---|
| Ways to draw 5 white balls of 69 | nCr(69,5) | 11238513 |
| … times 26 possible bonus balls: the jackpot odds | nCr(69,5)*26 | 292201338 |
| A 6-from-59 lotto | nCr(59,6) | 45057474 |
| Roof pitch of 6 in 12, in degrees | atan(6/12) | 26.5650511771 |
| $10,000 at 4.5 % a year for 10 years | 10000*1.045^10 | 15529.6942173 |
| Years for that money to double | ln(2)/ln(1.045) | 15.7473018365 |
$10,000 at 4.5 % grows to $15,529.69 in 10 years and doubles in just under 16. The display shows up to 12 significant digits, and whole numbers without thousands separators.
How it works
- Type the calculation with your keyboard or tap the keys — for example 2 sin(30) + √16 or 5! / (2! 3!).
- The result appears as you type; press = or Enter to keep it and carry on from it with ans.
- Switch between degrees and radians with DEG/RAD; earlier calculations stay in the history, ready to reuse.
Frequently asked questions
- Which functions are there?
- sin, cos, tan and their inverses, sinh, cosh, tanh, ln, log, log2 and log with any base, e^x and 10^x, powers and roots, x!, nPr and nCr, abs, round, floor, ceil, min, max, mod, % and the constants π and e.
- Degrees or radians?
- Degrees by default: sin(30) = 0.5 and tan(45) = 1. Switch to RAD for radians, where sin(π) = 0. tan(90°) shows “Not defined” instead of a huge number.
- Why is 6/2(1+2) equal to 1?
- Like most scientific calculators, a multiplication written without a sign — 2(1+2), 2π — is done before division, so 6/2(1+2) is 6/6. Write (6/2)(1+2) for 9.
- Is 0.1 + 0.2 really 0.3 here?
- Yes — results are shown to 12 significant digits with the tiny rounding noise of computer arithmetic tidied away, so 0.1 + 0.2 = 0.3 and sin(180°) = 0.
- How do I work out combinations and permutations?
- nCr(n,r) for combinations, where order does not matter, and nPr(n,r) for permutations, where it does: nCr(69,5) = 11238513, nPr(10,3) = 720. x! is the factorial: 5! = 120.
- How do I type powers and roots?
- ^ for a power (1.045^10), √16 or sqrt(16) for a square root, cbrt(27) for a cube root and 27^(1/3) for any other root; 2E3 is 2 × 10³, 2000.
- Is my history saved online?
- No. The history stays in this browser only; clear it with one click.
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