Online tools, calculators ranging from networking (ipv4, binary) to financial.(mortgage, interest)

Check the class of an IP address

4.2

Convert IPV4 to binary

3.8

Compare the prices of two products

2.5

Check the profit margin as a percentage

3

Check the markup as a percentage

3.2

Compound Interest of a loan

3.1

Find the monthly repayment of a mortgage

2.6

Calculate your electric bill cost based on usage

3.7

Calculate the number of Subnets

2

Calculate the number of hosts

2.2

Convert subnet mask to a wildcard mask

4.1

Convert subnet mask to a CIDR

4.4

Check if an IPV6 Address is vaild

4.3

Check the size of your screen

4

Check if an IPV4 Address is vaild

Convert a Wildcard Mask to a Subnet Mask

2.1

How much to save every week to reach a certain amount.

Calculate the Subnet Mask to Binary Notation

Check the number of hosts that is in a subnet on CIDR

Compressor or Shorten an IPv6 Address

3.9