About Curta Calculators

A Curta Calculator

A Curta Calculator

What is a Curta Calculator?

A Curta Calculator is a hand-cranked mechanical calculator that fits in the palm of your hand. It was originally sold in 1948 and performs addition, subtraction, multiplication & division operations, With some skill, it is even possible to compute advanced mathematics such as square roots and other operations.

What's amazing about a Curta Calculator is that the entire device operates completely on mechanical power without any electricity to accurately compute an equation. The Curta Calculator utilizes a symphony of gears, sliders & drums to find the solution. Considering it predated most computers, the Curta Calculator is an amazing piece of collectible period engineering.

For a demonstration of the operation of a Curta Calculator, we suggest you check out this video.

Curta Calculators were made in two distinct models: Type 1 and Type 2.

  • Type 1 Curta Calculators are the smaller of the two models and are made of either plastic or metal. Type 1 Curta Calculator models have 8 input registers, a 6 digit crank turn register, and an 11 digit result register. They weigh approximately 8 ounces and were originally sold with a plastic or metal carrying case.
  • Type 2 Curta Calculators are the larger of the two models and are made of either plastic or metal. Type 2 Curta Calculator models have 11 input registers, a 8 digit crank turn register, and an 15 digit result register. They weigh approximately 12 ounces and were originally sold with a plastic or metal carrying case.

Generally, earlier models featured more metal parts than their later counterparts.

Since their introduction, an estimated 140,000 Curta Calculators were made and sold until the early 1970s, when electronic calculators became available. Fortunately, it's still possible to purchase a vintage Curta calculator today. Where? Why the internet of course!

Here are current Curta Calculator listings on eBay:

CURTA MECHANICAL CALCULATOR TYPE 1 NO 27822 WITH CASE NEAR MINT 1954
CURTA MECHANICAL CALCULATOR TYPE 1 NO 27822 WITH CASE NEAR MINT 1954
$950.00
Time Remaining: 24d 20h 32m
Buy It Now for only: $950.00

CURTA TYPE II MECHANICAL CALCULATOR EXCELLENT OPERATIONAL & COSMETIC CONDITION
CURTA TYPE II MECHANICAL CALCULATOR EXCELLENT OPERATIONAL & COSMETIC CONDITION
$1,395.00
Time Remaining: 28d 18h 58m
Buy It Now for only: $1,395.00

CURTA TYPE II Calculator COMPLETE SET w/ original box, can, manuals, NEVER USED
CURTA TYPE II Calculator COMPLETE SET w/ original box, can, manuals, NEVER USED
$1,695.00
Time Remaining: 3d 2h 9m
Buy It Now for only: $1,695.00

RARE - CURTA Calculator TYPE I SERIAL NUMBER 62405 Works GREAT SHAPE!
RARE - CURTA Calculator TYPE I SERIAL NUMBER 62405 Works GREAT SHAPE!
$730.99
Time Remaining: 18h 20m
Buy It Now for only: $730.99

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 28d 1h 12m
Buy It Now for only: $19.95

Curta Calculator Vintage Type I Serial #21521 With Metal Case 1953 *WORKING*
Curta Calculator Vintage Type I Serial #21521 With Metal Case 1953 *WORKING*
$800.00
Time Remaining: 5d 23h 16m
Buy It Now for only: $800.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 8d 12h 29m
Buy It Now for only: $19.95

Vintage Curta Mechanical Calculator
Vintage Curta Mechanical Calculator
$467.00 (2 Bids)
Time Remaining: 2d 19h 57m

CURTA-Instructions for use of the Curta Calculator (booklet in english language)
CURTA-Instructions for use of the Curta Calculator (booklet in english language)
$19.50
Time Remaining: 3d 3h 40m
Buy It Now for only: $19.50

♕♕♕ RARE - CURTA Calculator TYPE II #526246- VERY GOOD STATE - 1964 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #526246- VERY GOOD STATE - 1964 ♕♕♕
$1,099.00
Time Remaining: 7d 20h 44m
Buy It Now for only: $1,099.00

Curta Calculator Holder Only
Curta Calculator Holder Only
$150.00
Time Remaining: 2d 16h 2m

CURTA Mechanical Calculator Serial # 70246 WITH BOX & MANUELS!
CURTA Mechanical Calculator Serial # 70246 WITH BOX & MANUELS!
$1,750.00
Time Remaining: 16d 2h 9m
Buy It Now for only: $1,750.00

Curt Herzstark CURTA Calculator TYPE 1 working w metal case #12162  c1950
Curt Herzstark CURTA Calculator TYPE 1 working w metal case #12162 c1950
$995.00
Time Remaining: 16d 16h 45m
Buy It Now for only: $995.00

CURTA-Computing examples for the Curta Calculator (booklet in english language)
CURTA-Computing examples for the Curta Calculator (booklet in english language)
$19.50
Time Remaining: 3d 3h 12m
Buy It Now for only: $19.50

CURTA CALCULATOR TYPE II #518953 Vinatage NEVER USED box & instructioins incl.
CURTA CALCULATOR TYPE II #518953 Vinatage NEVER USED box & instructioins incl.
$699.00 (1 Bid)
Time Remaining: 1d 16h 57m

Vinatge 1951 Curta Type I Calculator No. 15062 - MINT w/ Original Box and Manual
Vinatge 1951 Curta Type I Calculator No. 15062 - MINT w/ Original Box and Manual
$1,800.00
Time Remaining: 20d 20h 35m
Buy It Now for only: $1,800.00

1970 CURTA TYPE 1 #79263 CALCULATOR CONTINA ORIGINAL Box Case Instructions WORKS
1970 CURTA TYPE 1 #79263 CALCULATOR CONTINA ORIGINAL Box Case Instructions WORKS
$1,407.99
Time Remaining: 22d 14h 29m
Buy It Now for only: $1,407.99

CURTA calculator Type 1 with metal case c1951
CURTA calculator Type 1 with metal case c1951
$1,595.00
Time Remaining: 16d 22h 9m
Buy It Now for only: $1,595.00

Very rare - Twin Prime number CURTA calculator - TYPE 1 - no. 37201
Very rare - Twin Prime number CURTA calculator - TYPE 1 - no. 37201
$1,099.00
Time Remaining: 3d 16h 14m
Buy It Now for only: $1,099.00

♕♕♕ RARE - Early BOXED CURTA Calculator TYPE I #7416 -VERY GOOD STATE - 1949 ♕♕♕
♕♕♕ RARE - Early BOXED CURTA Calculator TYPE I #7416 -VERY GOOD STATE - 1949 ♕♕♕
$1,599.00
Time Remaining: 7d 12h 16m
Buy It Now for only: $1,599.00

Curta Calculator Type II Metal Case Only
Curta Calculator Type II Metal Case Only
$300.00
Time Remaining: 2d 16h 10m

RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
$59.99
Time Remaining: 8d 59m
Buy It Now for only: $59.99

♕♕♕ RARE - CURTA Calculator TYPE II #514414 - Near MINT STATE - 1960 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #514414 - Near MINT STATE - 1960 ♕♕♕
$1,999.00
Time Remaining: 3d 11h 18m
Buy It Now for only: $1,999.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$19.95
Time Remaining: 14d 16h 37m
Buy It Now for only: $19.95

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