online calculator is a much needed tool, always available in your browser, for a wide range of people who need to quickly make calculations without resorting to any application programs. This online calculator, which we offer to use directly on our website, is free from the shortcomings of many similar services and applications, such as incorrect calculation results or insufficient mathematical functionality. Our one of the best and most powerful calculators is designed for any, simple and complex calculations: percentages, trigonometric functions, logarithms, root extraction and much more from the field of higher mathematics.
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One of the main features of our calculator is the ability to plot graphs, this rare feature is useful for both schoolchildren and students, and people involved in scientific activities. Our service is designed not only for students and researchers, it can also be useful for business representatives, accountants, financiers and many other people whose professional activities involve frequent mathematical calculations. Now you do not need to look for a calculation program on your computer, or carry a calculating machine with you, just go to this site and use the calculator online
Free calculator is our new online service, which is based on the idea of providing all website visitors with unlimited access to the calculator for free from any computer, tablet or smartphone. Around the clock, anywhere where there is Internet! The site offers to use this free calculator with the widest possibilities without user registration.
This free calculator is quite simple and easy to learn, but not everyone will be able to use all the functionality of the calculator without a special instruction that we have prepared for you. The instruction will inform you in detail about the correct notation of mathematical operations and about all the functions of the calculator using specific examples. All this to make it easy and convenient for you to use our calculator.
Depending on your requirements and the level of complexity of calculations, the calculator can be used as a regular calculator - to perform basic arithmetic operations, or as an engineering calculator - for advanced mathematical calculations with additional functions. For all types of operations with a free calculator, there are examples in the instructions.
To use the calculator, you need to enter numbers and characters using the manipulator (mouse) by clicking on the button panel of the calculator itself. The sequence of entered mathematical expressions will be displayed on the virtual display, and after pressing the “equals” button, the calculator will instantly perform calculations and give the required result without deleting the sequence itself from the “display”. You can also make calculations from the keyboard, for this, first of all, click once with the left mouse button on the data entry field. After that, start entering data from the numeric keypad. Pressing the "enter" key is equivalent to the "equals" button. For more information about managing the math calculator, see
A percentage is one hundredth of a number taken as a whole. Percentages are used to indicate the ratio of a part to a whole, as well as to compare quantities.
1% = 1 100 = 0,01
The interest calculator allows you to perform the following operations:
Find percentage of a number
To find a percentage p from a number, you need to multiply this number by a fraction p 100
Let's find 12% of the number 300:
300 12
100
= 300 0.12 = 36
12% of 300 equals 36.
For example, a product costs 500 rubles and a 7% discount applies to it. Find the absolute value of the discount:
500 · 7
100
= 500 0.07 = 35
Thus, the discount is 35 rubles.
What percentage is one number of another
To calculate the percentage of numbers, you need to divide one number by another and multiply by 100%.
Let's calculate how many percent is the number 12 of the number 30:
12
30
100 = 0.4 100 = 40%
The number 12 is 40% of the number 30.
For example, a book contains 340 pages. Vasya read 200 pages. Let's calculate how many percent of the whole book Vasya has read.
200
340
100% = 0.59 100 = 59%
Thus, Vasya read 59% of the entire book.
Add a percentage to a number
To add to the number p percent, you need to multiply this number by (1 + p 100)
Let's add 30% to the number 200:
200 (1+ 30
100
) = 200 1.3 = 260
200 + 30% equals 260.
For example, a subscription to the pool costs 1000 rubles. From next month they promised to raise the price by 20%. Let's calculate how much the subscription will cost.
1000 (1+ 20
100
) = 1000 1.2 = 1200
Thus, the subscription will cost 1200 rubles.
Subtract a percentage from a number
To subtract from the number p percent, you need to multiply this number by (1 - p 100)
Subtract 30% from the number 200:
200 (1 - 30
100
) = 200 0.7 = 140
200 - 30% equals 140.
For example, a bicycle costs 30,000 rubles. The store gave him a 5% discount. Let's calculate how much the bike will cost, taking into account the discount.
30000 (1 - 5
100
) = 30000 0.95 = 28500
Thus, the bike will cost 28,500 rubles.
By what percentage is one number greater than the other?
To calculate how many percent one number is greater than another, you need to divide the first number by the second, multiply the result by 100 and subtract 100.
Let's calculate how many percent the number 20 is greater than the number 5:
20
5
100 - 100 = 4 100 - 100 = 400 - 100 = 300%
The number 20 is greater than the number 5 by 300%.
For example, the salary of a boss is 50,000 rubles, and an employee is 30,000 rubles. Find by how many percent the boss's salary is higher:
50000
35000
100 - 100 = 1.43 * 100 - 100 = 143 - 100 = 43%
Thus, the boss's salary is 43% higher than the employee's salary.
By what percentage is one number less than the other?
To calculate how many percent one number is less than another, you need to subtract from 100 the ratio of the first number to the second, multiplied by 100.
Let's calculate how many percent the number 5 is less than the number 20:
100 - 5
20
100 = 100 - 0.25 100 = 100 - 25 = 75%
The number 5 is less than the number 20 by 75%.
For example, freelancer Oleg in January completed orders for 40,000 rubles, and in February for 30,000 rubles. Let's find by what percentage Oleg earned less in February than in January:
100 - 30000
40000
100 = 100 - 0.75 * 100 = 100 - 75 = 25%
Thus, in February Oleg earned 25% less than in January.
Find 100 percent
If number x This p percent, then you can find 100 percent by multiplying the number x on the 100p
Finding 100% if 25% is 7:
7 · 100
25
= 7 4 = 28
If 25% equals 7, then 100% equals 28.
For example, Katya copies photos from her camera to her computer. 20% of photos were copied in 5 minutes. Let's find how much time the copying process takes:
5 · 100
20
= 5 5 = 25
We get that the process of copying all photos takes 30 minutes.
The modern way of life requires constant dynamics. Making calculations on a calculator, we significantly save our time, do not risk making mistakes and get an accurate result. Thanks to the invention of this device, many people have forgotten what shortages and errors in calculations are. However, a calculator is different from a calculator, and if primitive computational functions can be done on a mathematical model, then the most complex calculations can be done only with the help of an engineering one. From now on, you do not need to purchase this miracle of modern technology - just turn to our online engineering calculator for help! The program works without additional installation - just go to the electronic page and start acting.
Online engineering calculator functions
A math-type calculator will only help you make primitive calculations. With it, you can do what we were taught in the elementary grades of high school:
- addition;
- subtraction;
- division;
- multiplication;
- interest subtraction;
- raising a number to a power;
- finding the square root.
Engineering calculator online includes all these and additional functions that are necessary for complex calculations. Now you do not have to spend extra money to buy this device, because you can make calculations on our website.
In addition to the above, our universal calculator will help you perform the following calculations:
Location:
- sine of the angle;
- tangent;
- cosine;
- cotangent;
- arcsine;
- arc tangent;
- arc cosine;
- inverse tangent.
Online engineering calculator interface
Performing all of the above calculations is quite simple. Our online engineering calculator has a clear interface, and therefore it is very convenient to work with it. In its appearance, it completely imitates a real calculator, so you do not need to study the functions for a long time. Despite this, we enclose detailed instructions and descriptions of each key.
Using our program is also beneficial because the calculations are made instantly - you do not need to update the site page, because the calculator works in flash mode. A huge number of people use our program every day. Among them are students of higher institutions, teachers, architects, scientists and other people interested in the accuracy of calculations. The online engineering calculator does not require downloading and installing additional plugins, so you can start using it right now!
Engineering calculator online
We hasten to present to everyone a free engineering calculator. With it, any student can quickly and, most importantly, easily perform various kinds of mathematical calculations online.
The calculator is taken from the site - web 2.0 scientific calculatorA simple and easy-to-use engineering calculator with an unobtrusive and intuitive interface will truly be useful to the widest range of Internet users. Now, when you need a calculator, visit our website and use the free engineering calculator.
An engineering calculator can perform both simple arithmetic operations and rather complex mathematical calculations.
Web20calc is an engineering calculator that has a huge number of functions, for example, how to calculate all elementary functions. The calculator also supports trigonometric functions, matrices, logarithms, and even plotting.
Undoubtedly, Web20calc will be of interest to that group of people who, in search of simple solutions, types in search engines a query: an online mathematical calculator. The free web application will help you instantly calculate the result of any mathematical expression, for example, subtract, add, divide, extract the root, raise to a power, etc.
In the expression, you can use the operations of exponentiation, addition, subtraction, multiplication, division, percentage, PI constant. Parentheses should be used for complex calculations.
Features of the engineering calculator:
1. basic arithmetic operations;
2. work with numbers in a standard form;
3. calculation of trigonometric roots, functions, logarithms, exponentiation;
4. statistical calculations: addition, arithmetic mean or standard deviation;
5. application of a memory cell and user functions of 2 variables;
6. work with angles in radian and degree measures.
The engineering calculator allows the use of a variety of mathematical functions:
Extraction of roots (square root, cubic root, as well as the root of the n-th degree);
ex (e to x power), exponent;
trigonometric functions: sine - sin, cosine - cos, tangent - tan;
inverse trigonometric functions: arcsine - sin-1, arccosine - cos-1, arctangent - tan-1;
hyperbolic functions: sine - sinh, cosine - cosh, tangent - tanh;
logarithms: base two binary logarithm is log2x, base ten base ten logarithm is log, natural logarithm is ln.
This engineering calculator also includes a calculator of quantities with the ability to convert physical quantities for various measurement systems - computer units, distance, weight, time, etc. With this function, you can instantly convert miles to kilometers, pounds to kilograms, seconds to hours, etc.
To make mathematical calculations, first enter a sequence of mathematical expressions in the appropriate field, then click on the equal sign and see the result. You can enter values directly from the keyboard (for this, the calculator area must be active, therefore, it will be useful to put the cursor in the input field). Among other things, data can be entered using the buttons of the calculator itself.
To build graphs in the input field, write the function as indicated in the example field or use the toolbar specially designed for this (to go to it, click on the button with the icon in the form of a graph). To convert values, press Unit, to work with matrices - Matrix.
Compared to other online calculators, our solution does calculations with an accuracy of up to 20 decimal places. Regular services display up to 10 characters. This is due to the need for large computing resources. Displaying up to 30 characters requires colossal hardware. Our service has the following advantages:
- the ability to scale the calculator to a convenient size;
- adaptation to any display size;
- calculations are made according to the rules of mathematics, taking into account the priority of operations of various types (addition, multiplication, etc.);
- the most accurate calculations;
- calculation of the entire expression at once, and not in parts.
The mathematical calculator makes it possible to accurately calculate any values according to the canons of mathematical laws. Does not create subtotals after entering each action, making the calculation take into account the entire mathematical expression, and not all operations individually.
Calculation example
If you try to determine the result of the calculations of the following example 3 + 3x3, then the system will give a result of 12. Other calculators, as a rule, will give a result of 18. This is due to the fact that after each action a subtotal is determined. Our program takes into account the hierarchy of mathematical symbols, first performing the operation of multiplication, and then only addition.
How to count on a simple calculator
A simple calculator makes simple calculations: add up the sum or difference, perform division and multiplication operations. When entering values, use the mouse or keyboard keys. The digital block will be the most convenient for calculations, but you can also use those keyboard buttons that are between the functional row and the letter block. All digital values on the keyboard correspond to the buttons of the online calculator.
To carry out addition and multiplication, division and subtraction, the following keys on the PC keyboard are used:
[*] - multiply;
[/] - share;
[-] - take away;
[+] - add;
- equals;
[.] - decimal separator.
To find out the result of a mathematical operation, you must press on the keyboard or the [=] sign in the calculator interface. To reset values using the keyboard, you can press one of the keys - or . By pressing the key you can delete the last entered value.
What operations can be performed on a simple calculator?
- (x) - multiplication;
- (÷) - division;
- (-) - subtraction;
- (+) - addition;
- (C) - reset values.
- (→) - delete the last entered character.
The history of the development of calculators goes back many centuries. In the Soviet era, enthusiasts call the most advanced model MK-52. The device had a powerful filling at that time and was used for programming, some experts managed to write games and programs on it. The legendary series survived the dawn of mobile technology and is still produced today under the name MK-152.