Basic Calculator
Calculator Use
This is a simple calculator with memory functions similar to a small handheld calculator. Use this basic calculator online for math with addition, subtraction, division and multiplication.
The calculator includes functions for square root, percentage, pi, exponents, powers and rounding. How to do repeating operations, higher powers and roots, memory and clear functions for this standard calculator are explained below.
Control the calculator using a mouse, keyboard or number pad, or by touch if supported by your device.
What Are the Functions on the Calculator?
 ÷ Division
 × Multiplication
 + Addition
 − Subtraction
 = Calculate
 +/ Plus/minus toggles the pos/neg sign of the displayed number
 mc Memory clear
 mr Memory recall
 m Memory minus
 m+ Memory plus
 CE Clear entry
 AC All clear
 √x Square root
 % Percentage
 π pi = 3.1415926536
 x^{y} Exponent
 R2 Round to 2 decimals (cents)
 R0 Round to 0 decimals (dollars)

Use your delete/backspace key to delete one character at a time from the right
 Using a keyboard, backspace with the delete button
 Using a touchscreen, on a phone or tablet, tap into the display then use the virtual keyboard delete button
 To copy, highlight the results in the display window and copy to your clipboard
How to Use Basic Calculator Operations
Browse example calculations using the Basic Calculator. Follow the steps to input numbers and symbols and perform calculations with operator buttons. Examples show you how to do simple math as well as how to do percentages on a calculator. You can also learn how to do present value and future value on a calculator.
Addition and Subtraction  
Calculation  Steps 
3 + 5 = 8  3 + 5 = 
7  9 = 2  7 − 9 = 
3 + (5) = 2  3 + 5 +/− = 
(7)  9 = 16  7 +/− − 9 = 
7.3 + 12.25  10.75 = 8.8  7.3 + 12.25 − 10.75 = 
Multiplication and Division  
Calculation  Steps 
13 × 3 × 2 = 78  13 × 3 × 2 = 
25 ÷ 2 = 12.5  25 ÷ 2 = 
8.35 × 17.25 ÷ 10.16 = 814.176919291  8.35 × 17.25 ÷ 10. 16 = 
Repeating Operations  
Calculation  Steps 
3 + 5 + 5 + 5 = 18  3 + 5 = = = 
3 + 3 + 3 = 9  3 + = = 
7  3  3  3  3 = 5  7 − 3 = = = = 
5 × 2 × 2 × 2 = 40  5 × 2 = = = 
2^{6} = 2 × 2 × 2 × 2 × 2 × 2 = 64  2 × = = = = = 
2^2^2^2^2 = ((((2^{2})^{2})^{2})^{2} = 65,536  2 x^{y} 2 = = = = 
For all of the above, if a second operand is not entered the first operand will be repeated.  
Memory Button Actions  
mc memory clear
mr memory recall m memory minus m+ memory plus 
clear memory to 0, will not affect display
display current memory value subtract display value from memory value add display value to memory value 
Memory Functions  
Calculation  Steps 
7 + 8 + 9  15 = 9  mc 7 m+ 8
m+ 9 m+ 15
m
mr will display 9 
15 + 25 = 40
plus π4^{2} = 50.2654824576 plus 12 × 6 = 72 = 162.26548246 
mc 15 + 25
= m+
4 x^{y} 2 = × π = m+ 12 × 6 = m+ mr will display 162.26548246 
Roots, Exponents and Power Functions  
Calculation  Steps 
√36 = 6  36 √x 
6^{2} = 36  6 x^{y} 2 =
or 6 × = 
6^{5} = 7,776  6 x^{y} 5 =
or 6 × = = = = 
^{5}√7,776 = 7,776^{1/5} = 6  mc 1 ÷ 5
= m+
7776 x^{y} mr = 
6^{3} = 1/6^{3} = 0.00462962963  6 x^{y} 3
+/− =
or 6 x^{y} 3 = ÷ = = 
Order of Operations
Enter your calculation in the order to be executed given parentheses and PEMDAS priority 

Calculation  Steps 
3 + 5 × 2 ÷ 4 = 4  3 + 5 × 2 ÷ 4 = 
3 + ((5 × 2) ÷ 4) = 5.5  5 × 2 ÷ 4 + 3 = 
Additional Operations  
Calculation  Steps 
1/x  reciprocal or multiplicitive inverse of x or, x^{1} 
1/5 = 0.2  5 ÷ = = 
A = πr^{2}  area of a circle 
radius r = 8
π8^{2} 
π × 8 × 8 = 
V = (4/3)πr^{3}  volume of a sphere 
radius r = 10
V = (4/3)π10^{3} = 4,188.7902048 
10 x^{y} 3 × 4 ÷ 3 × π = 
PV = FV /(1+i)^{n}  present value (PV) of a future value (FV) at
interest rate (i) for a number of years (n) 
PV = 10,000, i = 7.3%, n = 5
10,000 / (1 + 0.073)^{5} = 7,030.75 
1 + 0.073
= (display is now 1.073)
÷ = = = == = × 10000= R2 or 1 + 0.073 = (display is now 1.073) x^{y} 5 = ÷ = = × 10000= R2 
FV = PV(1+i)^{n}  future value (FV) of a present value (PV) at
interest rate (i) for a number of years (n) 
FV = 10,000, i = 7.3%, n = 5
10,000(1 + 0.073)^{5} = 14,223.24 
1 + 0.073
= (display is now 1.073)
× = = = = × 10000= R2 or 1 + 0.073 = (display is now 1.073) x^{y} 5 = × 10000= R2 
Percentage Operations  
Calculation  Steps 
12 plus 10% is ?
12 + (12 × 10%) = 13.2 
12 + 10 %
(display is 10% of 12 = 1.2) = 
10 minus 10% is ?
10  (10 × 10%) = 9 
10 − 10 %
(display is 10% of 10 = 1) = 
10% of 15 is ?
15 × 10% = 1.5 
15 × 10 %
(display is 10% in decimal = 0.1) = 
15 is 10% of ?
15 ÷ 10% = 150 
15 ÷ 10 %
(display is 10% in decimal = 0.1) = 
Advanced Percentage Calculations  
Calculation  Steps 
list price + sales tax = final price  sales tax addition 
list price = 35.25, tax percentage = 7.5%
35.25 + (35.25 × 0.075) = 37.89 35.25 + 2.64375 = 37.89 
35.25
+ 7.5
%
(display is tax dollar amount 2.64375) = R2 (display is final price 37.89) 
list price  discount = sale price  discount subtraction 
list price = 40, discount percentage = 25%
40.00  (40.00 × 0.025) = 30.00 40.00  10.00 = 30.00 now add in tax of 7.5% ??? 
40 − 25 %
(display is discount dollar amount 10) = R2 (display is sale price 30.00) + 7.5 % = R2 (display is final price 32.25) 
Correcting Mistakes  
Calculation  Steps 
3 + 5 = 8  3 + 7 CE 5 = 
12 × 2 = 24  11 × 2 CE AC 12 × 2 = 
7.329 + 4.755 = 12.084  7.329 + 4.766 backspace backspace 55 = 
5 × 6 = 30  5 − + × 6 = 
15 + 10 = 25  15 + 10 +/− +/− = 
More About Using the Calculator Memory
The calculator memory is at 0 until you hit m+ or m. Each time you hit m+ the number on the display is added to the number in the calculator memory. Each time you hit m the number on the display is subtracted from the number in the calculator memory. To recall the number in the calculator memory hit mr. To zero out the memory hit mc.
Use AC to clear out the current calculation. Use CE to clear out the most recent entry. Note that if the AC key is not visible, hit CE and then AC to clear out your calculation.
To view a web page containing only this calculator see The Online Calculator at https://www.theonlinecalculator.com.
If you need to see a running total and tape history of your calculations use our Adding Machine Calculator.
Cite this content, page or calculator as:
Furey, Edward "Basic Calculator" at https://www.calculatorsoup.com/calculators/math/basic.php from CalculatorSoup, https://www.calculatorsoup.com  Online Calculators