Every version of windows there is a calculator by pressing the windows key to open a start menu through using the window search you can type a calculator and you search it. Through using calculator time can be reduced. Windows 10 we can use the modern calculator. Through using the windows 10 size can be reusable and we can control the adjust dynamically and using the calculator you can easily make a mistake by entering the number in the calculator and **how much to tip **. In a calculator, there is a memory store and memory recall. The memory store button put into the memory. Memory recall is used to load into the calculator. You can store the multiple values in memory to recall them easily. Through using the calculator you can convert any kind of measure using several different units. Such as currency, volume, length, weight, and mass, temperature, energy, area, speed, time, power, data, pressure, angle.

**Calculator with techniques**

In windows 10 calculator there are additional things m+ and m- used for adding and substrates. In programming the switch between difference between binary to decimal, hexadecimal to octal, octal to decimal, hexadecimal, and it can perform the logical operation the switch between 16 bits, 32 bits, and 64 bits. You can delete the individual entry using the calculator.we can create a tip calculator using HTML, CSS, Javascript. The tip calculator is a little tool to help maintain records. HTML is used to create a layout of the tip calculator and it performs specific parameters. CSS which make helps to make the presentable and attractive for a better outlook. The Javascript is the process of logical implementation billing amount, service quality, tip total, a bill total. The importance of tipping help full for the employee. Tipping is typically like a blockchain. Some techniques are suggested for travelers and using the tip calculator we can easily calculate the number of people. We can calculate the amount for a person among a group of easily using the tip calculator. In ancient days there is no calculator. So simple mathematical calculations can only be done by people in those days. There is no instrument to calculate difficult calculations. Drilling point calculation made simple which finds the correct dimension and drilling through the workplace. Through using this drilling calculator there are two factors of the effective diameter of the drill and angle of the drill point.

How to use the drill?

Find the ratio of the drill

Measure the angle of the drill

Divide the angle by two

Using the drilling operation cutting time and length it can be calculated by the drilling calculator. We can easily find the length of the drilled hole using the drill calculator. But the speed of the drill calculator is low when the metal is drilled. The advantage of drilling calculators we reduce working time.

**Drilling speed and feed calculator**

Spindle speed (RPM) and feed rate(IPM) for a drilling operation can or calculator cutting time for a given cut length can also be calculated using this drill calculator. In drilling calculator, it contains workpieces and tools material. How is the depth of the drill calculator is 90-degree point angle is seen in the spot drill the calculation of the depth of the hole can easily be calculator by this and divide the diameter of the spot drill hole. Spot drill calculators are used more comparing the central drills. The spot drills have a chisel edge.