There is currently no academic consensus over whether Hebrew gematria or Greek isopsephy was used first. EnglishQabala.com is yet another free website with an online gematria calculator. If you are not familiar with this gematria then these guidelines can be helpful to get a better understanding of it. You can enter your input there and calculate the gematria. Variant spellings of some letters can be used to produce sets of different numbers, which can be added up or analyzed separately. Gematrinator.com is my favorite website on this list to calculate gematria online. This calculator has a collection of over 30 gematria ciphers. You can configure it for the ciphers that you want to use. Apart from that, it also breaks the value character-by-character. This shows you the value of each character in the selected gematria cipher. However this cipher was not used by anyone until 2010 when it was incorporated into an online numerology calculator. Since that time it has become popular among conspiracy theorists and numerologists. Pythagorean English Gematria is based on a method called “Reduction.” All numbers are reduced to single digits. Letters J-Z  have double digit values and need to be reduced. For example, Z is 26 according to the simple English Gematria chart above. According to Pythagorean Gematria, Z will be equal to 8 (2+6) this is the sum of its digits.