Wolf's Collection of Slide Rule Replicas

Slide rules are not manufactured anymore. The ones, which still exist, will eventually deteriorate with time. Here you will find a collection of some of the most prominent models carefully hand-crafted and simulated (or emulated) in JavaScript.

It is a Slide Rule Simulator or Emulator

All the scales are programmatically drawn based on reverse engineered mathematical equations. As such, no images are used for visualisation (only some decorations). And this is why those simulations are of the highest quality. This is also why the word "replica" is quite appropriate for those simulations.

In random order:

Aristo

Nestler

23 R

Keuffel & Esser

68-1100 Deci-Lon

Faber-Castell

Hemmi / Post

Staedtler

544 28

Graphoplex

Pickett

PIC/Thornton

Zvi Doron

Ultra_Log

Flying Fish

1003

Breitling

Cosmonaute

GJM

(Gregory J. McClure)

Michael O'Leary

Model 1-10 Premier

HERCs

Hogwarts

Quick manual

Drag rule or cursor with mouse.

Use mouse wheel to zoom-in or zoom-out.

Click on checkboxes for appropriate actions.

Right-click on cursor or on scale to enter digital values for automation. You can:

Enter integer or floating-point value, i.e.: 3.14 (use either dot or comma to separate fraction)
Enter degrees using ":", i.e.: 2:30:26

Enter pre-defined constants:

pi	pi0	pi1	pi2	e0	e
π = 3.14159....	π / 10 = 0.31416....	π × 10 = 31.41593....	π × 100 = 314.15927....	e = 2.71828....	e / 10 = 0.27183....
e1	e2	c	r	r0	r1
e × 10 = 27.18282....	e × 100 = 271.82818....	√(4/π) = 1.12838....	18/π = 5.72958....	1.8/π = 0.57296....	180/π = 57.29578....
r2	r3	r10	re	q	c1
√2 = 1.41421....	√3 = 1.73205....	√10 = 3.16228....	10/e = 3.67879....	π/1.8 = 1.74533....	√(40/π) = 3.56825....

Chemical scale may have additional constans. Use air, co2, h2o, water, etc...
To move cursor to additional hairline, press and hold CTRL key while right-clicking on scale and hairline.
To move slide to additional hairline, press and hold CTRL with SHIFT while right-clicking on scale and hairline.
If you right-click very close to either left or right index, then slide or cursor will move to this index instead.

A sample simulation of Faber-Castell 2/83N replica can be viewed below.

Markings on side. Markings on centre hairline. Markings on additional hairlines. Other side. Version US/German. Short/Long