Welcome to Alcula`, home of the Online Scientific Calculator:

The Virtual Calculator emulates a real pocket calculator. Type on your keyboard or use your mouse to press the buttons.

It supports trigonometric functions, logarithm and antilogarithm. The new test version also supports factorial and rudimentary programming. This feature is ever expanding. Check back often for new keys and functionality.

Go to the conversion page to convert between units of measure of length, area or weight.

Suan Pan (算盘) is the Chinese name for the Chinese abacus. It has two decks, the lower deck has 5 beads for each rod, the upper deck has two. To use the virtual suanpan, your browser must allow javascript. The version of Suan Pan on this website has 18 rods, you can perform calculations with numbers up to 18 digits.

Click this link to visit the soroban. Soroban (そろばん) is the Japanese name for the Japanese abacus. Like the Chinese abacus, it has two decks, but the lower deck has 4 beads for each rod and the upper deck has only one. To use the soroban on this site, your browser must allow javascript. The Soroban on this site has 18 rods.