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:

Vintage Curta Mechanical Calculator Type II by Contina Ltd. Mauren
Vintage Curta Mechanical Calculator Type II by Contina Ltd. Mauren
$560.00 (8 Bids)
Time Remaining: 1d 17h 5m

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 4d 7h 26m
Buy It Now for only: $19.95

CURTA-Instructions for use of the Curta Calculator (booklet in english language)
CURTA-Instructions for use of the Curta Calculator (booklet in english language)
$19.00
Time Remaining: 28d 10h 30m
Buy It Now for only: $19.00

Curta Type 1 Pepper Grinder Calculator w/ Case & Instr. Contina Liechtenstein
Curta Type 1 Pepper Grinder Calculator w/ Case & Instr. Contina Liechtenstein
$1,100.00
Time Remaining: 29d 5h 45m
Buy It Now for only: $1,100.00

Curta calculator by Contina ltd
Curta calculator by Contina ltd
$750.00
Time Remaining: 3d 10h 46m

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 17d 5h 11m
Buy It Now for only: $19.95

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$18.95
Time Remaining: 23d 9h 19m
Buy It Now for only: $18.95

♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
$999.00
Time Remaining: 25d 7h 9m
Buy It Now for only: $999.00

Curta Type II Black Mechanical Calculator, #508533 (1956), w/ Case
Curta Type II Black Mechanical Calculator, #508533 (1956), w/ Case
$1,022.56 (14 Bids)
Time Remaining: 3d 13h 51m

RARE EARLY 1956 CURTA Type I CALCULATOR in PERFECT WORKING COND.  AS BEING NEW
RARE EARLY 1956 CURTA Type I CALCULATOR in PERFECT WORKING COND. AS BEING NEW
$1,695.00
Time Remaining: 6d 5h 16m
Buy It Now for only: $1,695.00

CURTA-Computing examples for the Curta Calculator (booklet in english language)
CURTA-Computing examples for the Curta Calculator (booklet in english language)
$19.00
Time Remaining: 15d 11h 12m
Buy It Now for only: $19.00

CURTA II Rechenmaschine Calculator #543527 (I370)
CURTA II Rechenmaschine Calculator #543527 (I370)
$450.00 (1 Bid)
Time Remaining: 4d 1h 37m
Buy It Now for only: $1,100.00

CURTA TYPE I Calculator COMPLETE SET prime #78887 w/ box,case,manuals NEVER USED
CURTA TYPE I Calculator COMPLETE SET prime #78887 w/ box,case,manuals NEVER USED
$1,795.00
Time Remaining: 11d 9h 20m
Buy It Now for only: $1,795.00

Curta Manual Calculator
Curta Manual Calculator
$1,200.00
Time Remaining: 24d 17h 33m
Buy It Now for only: $1,200.00

♕♕♕ RARE - CURTA Calculator TYPE I #25194 - GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #25194 - GOOD STATE - 1954 ♕♕♕
$999.00
Time Remaining: 15d 8h 47m
Buy It Now for only: $999.00

1953 Curta Type II Mechanical Calculator Serial #500547 Contina w/ instructions
1953 Curta Type II Mechanical Calculator Serial #500547 Contina w/ instructions
$570.00 (15 Bids)
Time Remaining: 6d 11h 58m

♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD STATE - 1964 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD STATE - 1964 ♕♕♕
$1,199.00
Time Remaining: 4d 2h 27m
Buy It Now for only: $1,199.00

CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
$19.95
Time Remaining: 13d 16h 41m
Buy It Now for only: $19.95

Rare early excellent Curta calculator type I # 21821 Prime number with can. 195
Rare early excellent Curta calculator type I # 21821 Prime number with can. 195
$555.00 (4 Bids)
Time Remaining: 7d 5h 22m

Vintage Type 1 Curta Mechanical Calculator #49457  w/case Tested Working
Vintage Type 1 Curta Mechanical Calculator #49457 w/case Tested Working
$500.00
Time Remaining: 27d 14h 30m
Buy It Now for only: $500.00

LATE CURTA TYPE I CALCULATOR in NEW State w/ case, 2 manuals, NEVER  USED
LATE CURTA TYPE I CALCULATOR in NEW State w/ case, 2 manuals, NEVER USED
$1,495.00
Time Remaining: 14d 12h 26m
Buy It Now for only: $1,495.00

Curta Calculator Type II. Made in Liechtenstein by Contina LTD Mauren
Curta Calculator Type II. Made in Liechtenstein by Contina LTD Mauren
$1,450.00
Time Remaining: 9d 14h 51m
Buy It Now for only: $1,450.00

1964 Vintage - Curta Calculator TYPE 2
1964 Vintage - Curta Calculator TYPE 2
$999.00
Time Remaining: 1d 6h 57m

curta calculator #540376
curta calculator #540376
$1,100.00
Time Remaining: 3d 4h 51m
Buy It Now for only: $1,100.00

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