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Scientific Calculator

A full scientific calculator with trig, logs and powers.

DEG
0

When to use it

Use this calculator for maths and science work that needs more than basic arithmetic: trigonometry, powers and roots, logarithms, factorials and scientific notation. It suits students, teachers and anyone who needs a quick, reliable scientific calculator on a phone or computer without installing an app.

How to use it

  1. Tap the buttons, or type directly into the Calculation box using numbers, + − * / ^ and brackets.
  2. Press = or Enter to work it out. Press Escape or C to clear.
  3. Use ⌫ to delete the last character.
  4. Check the angle mode at the top: DEG or RAD.
  5. Use Ans to insert the last answer in a new calculation.
  6. Find earlier results under History. Tap one to put that calculation back in the box, so you can change a number and work it out again.

Worked examples

  • Trigonometry: in DEG mode, sin(30) = 0.5. Switch to RAD and sin(30) gives about −0.988, because 30 radians is a very different angle.
  • Powers and roots: 2^10 = 1024, and √(144) = 12.
  • Brackets: 3 × (4 + 5)² = 243. Without the brackets, 3 × 4 + 5² = 37.
  • Scientific notation: the speed of light is about 3e8 meters per second. Multiply by 60 to get the distance light travels in a minute: 1.8e10 meters.
  • Factorials: 5! = 120, the number of ways to arrange five books on a shelf.

Order of operations

The calculator follows the standard order: brackets first, then powers and roots, then multiplication and division, then addition and subtraction. Factorials and percentages apply to the number just before them. When in doubt, add brackets to make your meaning clear. You can also leave out the × sign before brackets and constants, so 2π and 3(4 + 1) work as expected.

Tips

  • Check the angle mode first. A wrong DEG or RAD setting is the most common reason trig answers look wrong.
  • Use brackets generously. They make the order of operations clear and avoid surprises.
  • Chain calculations with Ans. After working out an area, type Ans × 2.5 to find the cost.
  • Type on a keyboard. It is faster for long expressions, and Enter works like =.

Common mistakes

  • Forgetting order of operations. Powers come before multiplication, and multiplication before addition: 2 + 3 × 4 = 14, not 20.
  • Missing brackets in fractions. Type (1 + 2) / 3, not 1 + 2 / 3.
  • Mixing up log and ln. They give different answers for the same number.
  • Very large factorials. Anything above 170! is too big for the calculator and shows as infinity.

Frequently asked questions

What is the difference between DEG and RAD?

They are two ways of measuring angles. DEG uses degrees, where a full turn is 360. RAD uses radians, where a full turn is 2π. School geometry usually uses degrees, while calculus and programming usually use radians. Tap the DEG button to switch.

What do log and ln mean?

log is the logarithm to base 10, so log(1000) = 3. ln is the natural logarithm, to base e, which is used in science and finance for growth and decay.

What does the % key do?

It divides the number before it by 100. So 15% gives 0.15, and 200 × 15% gives 30.

How do I enter very large or small numbers?

Use EXP for scientific notation. For 3 × 10⁸, type 3, press EXP, then type 8. The display shows 3e8.

Does it remember my calculations?

The history and your DEG or RAD choice are saved in your browser on this device only. Press Clear in the history to remove them.

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