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:

1970 Vintage - Curta Calculator
1970 Vintage - Curta Calculator
$899.00
Time Remaining: 8h 32m
Buy It Now for only: $1,799.00

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 11d 19h 29m
Buy It Now for only: $19.95

RARE Vintage Type 1 Curta Mechanical Calculator #47675 Works w/case
RARE Vintage Type 1 Curta Mechanical Calculator #47675 Works w/case
$998.98
Time Remaining: 10d 35m
Buy It Now for only: $998.98

♕♕♕ RARE - CURTA Calculator TYPE I #24504 - GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #24504 - GOOD STATE - 1954 ♕♕♕
$1,099.00
Time Remaining: 11d 12h 27m
Buy It Now for only: $1,099.00

Curta Calculator
Curta Calculator
$283.51 (4 Bids)
Time Remaining: 9h 53m

RARE EARLY 1954 ALL BLACK CURTA Type II Calculator Low SN #502279 w/can, manuals
RARE EARLY 1954 ALL BLACK CURTA Type II Calculator Low SN #502279 w/can, manuals
$1,795.00
Time Remaining: 25d 21h 51m
Buy It Now for only: $1,795.00

♕♕♕ 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: 11d 14h 29m
Buy It Now for only: $1,199.00

Rare Late Curta Calculator Type 1
Rare Late Curta Calculator Type 1
$1,400.00
Time Remaining: 6d 3h 7m
Buy It Now for only: $1,400.00

Curta Calculator Type II. Made in Liechtenstein by Contina LTD Mauren # 546286
Curta Calculator Type II. Made in Liechtenstein by Contina LTD Mauren # 546286
$550.00 (1 Bid)
Time Remaining: 3d 44m

Curta Type 1 calculator Mint Condition with Case
Curta Type 1 calculator Mint Condition with Case
$2,500.00
Time Remaining: 25d 18h 57m
Buy It Now for only: $2,500.00

♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
$999.00
Time Remaining: 2d 19h 11m
Buy It Now for only: $999.00

ORIGINAL CURTA TYPE II CALCULATOR & ORIGINAL CANISTER NICE CONDITION
ORIGINAL CURTA TYPE II CALCULATOR & ORIGINAL CANISTER NICE CONDITION
$251.00 (19 Bids)
Time Remaining: 5d 2h 14m

RARE Vintage Collectible Curta Type 2 Mechanical Calculator Includes Provenance
RARE Vintage Collectible Curta Type 2 Mechanical Calculator Includes Provenance
$2,800.00
Time Remaining: 22d 4h 14m
Buy It Now for only: $2,800.00

Vinatge 1951 Curta Type I Calculator No. 15062 - MINT
Vinatge 1951 Curta Type I Calculator No. 15062 - MINT
$1,999.99
Time Remaining: 7d 1h 20m
Buy It Now for only: $1,999.99

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 24d 17h 14m
Buy It Now for only: $19.95

1964 Vintage - Curta Calculator
1964 Vintage - Curta Calculator
$1,250.00
Time Remaining: 6d 7h 24m

CURTA TYPE II Calculator COMPLETE SET w/ original box, case, manuals, NEVER USED
CURTA TYPE II Calculator COMPLETE SET w/ original box, case, manuals, NEVER USED
$1,795.00
Time Remaining: 25d 21h 43m
Buy It Now for only: $1,795.00

Curta Manual Calculator
Curta Manual Calculator
$1,200.00
Time Remaining: 1d 19h 36m
Buy It Now for only: $1,200.00

1964 Vintage - Curta Calculator
1964 Vintage - Curta Calculator
$1,250.00
Time Remaining: 8h 30m
Buy It Now for only: $2,499.00

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: 22d 23h 14m
Buy It Now for only: $19.00

CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
$19.95
Time Remaining: 21d 4h 43m
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: 27d 5h 58m
Buy It Now for only: $19.00

EARLY CURTA CALCULATOR TYPE I - NO Serial No. 50745 -  EARLY EXAMPLE
EARLY CURTA CALCULATOR TYPE I - NO Serial No. 50745 - EARLY EXAMPLE
$1,529.31
Time Remaining: 2d 18h 27m

♕♕♕ RARE - LATE CURTA Calculator TYPE II #556263 - Near MINT STATE - 1970 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #556263 - Near MINT STATE - 1970 ♕♕♕
$1,399.00
Time Remaining: 11d 14h 40m
Buy It Now for only: $1,399.00

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