###### Asked in InventionsMath and ArithmeticCalculatorsMath History

Inventions

Math and Arithmetic

Calculators

Math History

# Who invented the slide rule?

## Answer

###### Wiki User

###### July 30, 2014 11:39AM

The slide rule was invented during the period of 1620-1650 by William Oughtred, based on the earlier invention of the Gunter scale by Edmund Gunter. The original slide rule is said to have been circular, and come about 1620 or 1625. The straight slide rule is said to have been invented around 1650.

## Related Questions

###### Asked in Inventions

### When was the slide rule invented?

Answer
The slide rule was invented by William Oughtred in 1625.
Answer
We do not know the precise year. A circular slide rule was invented
by William Oughtred some time about 1620, and a design of a similar
slide rule by Delamain was printed in about 1630. The straight
slide rule seems to have been invented later, some time around
1650.

###### Asked in Math History

### Who invented the Slide-Rule?

###### Asked in Calculators, Math History

### What was the purpose of slide rule?

Well.. the purpose of the slide rule is that, to count, add,
subtract, multiply, and divide. For as its structure is like a
ruler and has a transparent slider. It is the type of a cursor,
used for pointing out the numerals/ numbers. It is the third
calculator invented, after Napier's bones. It was invented by
Napier, as well.

###### Asked in Inventions, Calculators, Math History

### Why was the slide rule invented?

The slide rule very much simplified calculations of
multiplication and division, especially were a ratio was to be used
over and over. Edmund Gunter had already invented the Gunter scale,
but it was clumsy and required dividers (the things like compasses,
but with two sharp ends instead of one sharp end and a piece of
pencil lead) to use. William Oughtred realized that two Gunter
scales facing each other made it unnecessary to use the dividers.
That realization was the invention of the slide rule.
The slide rule was developed to perform multiplication and
division before calculators had been invented. a addition and
subtraction

###### Asked in Math and Arithmetic

### What is the 7x7 rule?

###### Asked in Inventions, History of Science, Math History

### What is an Oughtred's slide rule?

The slide rule, also known as a slipstick, is a
mechanical analog computer. The slide rule is used primarily for
multiplication and division, and also for "scientific" functions
such as roots, logarithms and trigonometry, but does not generally
perform addition or subtraction. William Oughtred and others
developed the slide rule in the 1600s
There are pictures and information about slide rules at the
Wikipedia article listed in the related links below.

###### Asked in Science

### Who invented slide calipers?

###### Asked in Inventions

### What invention replaced the slide rule?

Slide rules were replaced by pocket calculators. This happened
very suddenly as soon as the price of the calculator became
comparable with the slide rule. The market for the slide rule dried
up almost completely, in much of the world, in less than a year.
Some specialty slide rules have survived, however.

Load More