Basic Calculator
A simple calculator: type a sum such as 12.5 × 4 − 3/4 and get the exact answer, as a fraction and a decimal.
Change the values and press Calculate to work out your own figures.
Evaluate an expression
Type an expression; the answer is exact where possible.
Show the working
- Read as: 12.5 × 4 − 3 ÷ 4
Order of operations, step by step
Type an expression; each step shows the next operation in PEMDAS order.
Show the working
- Read as: 22 + 6 × ((14 − 6) ÷ 4 × (18 − 4^2))
- 1. subtract: 22 + 6 × (8 ÷ 4 × (18 − 4^2))
- 2. exponent: 22 + 6 × (8 ÷ 4 × (18 − 16))
- 3. subtract: 22 + 6 × (8 ÷ 4 × 2)
- 4. divide: 22 + 6 × (2 × 2)
- 5. multiply: 22 + 6 × 4
- 6. multiply: 22 + 24
- 7. add: 46
How to use it
Type an expression; the answer is exact where possible. Type an expression; each step shows the next operation in PEMDAS order.
Number boxes accept whole numbers, decimals, fractions (3/4), powers (2^10), roots (sqrt(2)) and the constants pi and e. Show the working lists the steps.
Key facts
+ − × ÷ ^ with the usual order of operations
Typing sums
Use * or × to multiply, / or ÷ to divide and ^ for powers; 2(3 + 4) multiplies. Answers stay exact fractions where they can.
Questions
How do I type a fraction?
As a division: 3/4.
Is 1/3 + 1/4 rounded?
No; it is exactly 7/12 (0.58(3) as a decimal).
Formulas
+ − × ÷ ^ with the usual order of operations
Sources
Limitations
- Expressions up to 500 characters; matrices up to 10 × 10.
- Big-number results up to 100,000 digits; factorials up to 10,000!.
- Numbers in words up to 10^102 (short scale).