Calculator
Switch between a normal calculator and a full scientific one.
A calculator for everyday arithmetic, with a Scientific mode you can switch to for trigonometry (sin, cos, tan in degrees or radians), logarithms, powers, roots, factorials, and the constants π and e — works with your keyboard or on-screen buttons, on any device.
Everyday examples
- Tip: for a 15% tip on a $48 bill, enter 48 × 15 % = to get $7.20.
- Sales tax: to add 8.25% tax to $59.99, enter 59.99 × 1.0825 = to get $64.94.
- Unit price: a 24-pack for $12.49 costs 12.49 ÷ 24 = about $0.52 per item.
The % key divides the current number by 100, so "15 %" becomes 0.15.
Scientific mode
Switch to Scientific for:
- Trigonometry: sin, cos and tan, in degrees (DEG) or radians (RAD).
- Powers and roots: x², x³, x^y, √ and 1/x.
- Logarithms: log (base 10) and ln (natural log), plus 10ˣ and eˣ.
- Factorials: n! — for example, 10! = 3,628,800.
- Constants: π (3.14159…) and e (2.71828…).
Most school problems use degrees. If sin(90) doesn't give 1, check that the calculator is set to DEG.
Order of operations
Like most handheld calculators, this one works left to right: each operation is applied as soon as you enter the next one. So 2 + 3 × 4 gives 20, because it calculates 2 + 3 = 5 first and then 5 × 4. To follow PEMDAS and get 14, do the multiplication first: 3 × 4 = 12, then + 2.
Keyboard shortcuts
| Key | Action |
|---|---|
| 0–9 and . | Enter numbers |
| + − * / | Add, subtract, multiply, divide |
| Enter or = | Equals |
| Backspace | Delete the last digit |
| Escape | Clear |
For specific jobs, a dedicated tool is faster: try the percentage calculator, tip calculator or loan payment calculator.
Frequently asked questions
Can I use my keyboard instead of clicking?
Yes — number keys, +, -, *, /, Enter (or =) for equals, Backspace to delete the last digit, and Escape to clear all work.
Does it follow order of operations (PEMDAS)?
No — like a physical handheld calculator, it computes left to right as you enter each operation, rather than applying multiplication/division before addition/subtraction. For example, 2 + 3 × 4 gives 20, not 14.
What's the difference between DEG and RAD?
They control how sin, cos, and tan interpret the number you enter — DEG treats it as degrees (0-360), RAD treats it as radians (0-2π). Switch to whichever your work uses; most everyday and school use is DEG.
How do I calculate a percentage of a number?
Multiply the number by the percentage and press %. For example, 20% of 85 is 85 × 20 % = 17.