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 Type II Calculator w/ Case - Please Read
Curta Type II Calculator w/ Case - Please Read
$899.99
Time Remaining: 9d 12h 29m
Buy It Now for only: $899.99

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 28d 15h 10m
Buy It Now for only: $19.95

CURTA Type 1 calculator, No.53065, by Contina AG Mauren
CURTA Type 1 calculator, No.53065, by Contina AG Mauren
$2,000.00
Time Remaining: 29d 9h 39m
Buy It Now for only: $2,000.00

CURTA mechanical type II calculator - perfectly working + Original metal case
CURTA mechanical type II calculator - perfectly working + Original metal case
$1,200.00
Time Remaining: 26d 5h 4m
Buy It Now for only: $1,200.00

 NICE CONDITION CURTA TYPE 1 CALCULATOR NO. 65308 by CONTINA  AG MAUREN
NICE CONDITION CURTA TYPE 1 CALCULATOR NO. 65308 by CONTINA AG MAUREN
$1,849.99
Time Remaining: 23h 40m
Buy It Now for only: $1,849.99

♕♕♕ RARE - CURTA Calculator TYPE I #44061 - VERY GOOD Cond - 1960 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #44061 - VERY GOOD Cond - 1960 ♕♕♕
$1,199.00
Time Remaining: 29d 1h 7m
Buy It Now for only: $1,199.00

♕♕♕ RARE - BOXED CURTA Calculator TYPE I #63511 - Near MINT Cond - 1966 ♕♕♕
♕♕♕ RARE - BOXED CURTA Calculator TYPE I #63511 - Near MINT Cond - 1966 ♕♕♕
$1,399.00
Time Remaining: 29d 1h 28m
Buy It Now for only: $1,399.00

CURTA-Computing examples for the Curta Calculator (booklet in english language)
CURTA-Computing examples for the Curta Calculator (booklet in english language)
$18.50
Time Remaining: 3d 16h 20m
Buy It Now for only: $18.50

CURTA-Instructions for use of Curta Calculator (2 sided fold-out manual)
CURTA-Instructions for use of Curta Calculator (2 sided fold-out manual)
$17.00
Time Remaining: 6d 9h 36m
Buy It Now for only: $17.00

CURTA TYPE II 2 Mechanical Calculator #524734 Gray Body Liechtenstein w/ Case
CURTA TYPE II 2 Mechanical Calculator #524734 Gray Body Liechtenstein w/ Case
$650.00
Time Remaining: 1d 22h 57m
Buy It Now for only: $1,200.00

♕♕♕ RARE - CURTA Calculator TYPE II #548843 - VERY GOOD Cond. - 1968 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #548843 - VERY GOOD Cond. - 1968 ♕♕♕
$1,399.00
Time Remaining: 29d 59m
Buy It Now for only: $1,399.00

1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
$32.99
Time Remaining: 3d 15h 36m
Buy It Now for only: $32.99

♕♕♕ RARE - Early CURTA Calculator TYPE II #516238 - Near MINT Cond. - 1960 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #516238 - Near MINT Cond. - 1960 ♕♕♕
$1,499.00
Time Remaining: 29d 1h 13m
Buy It Now for only: $1,499.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #506016 - VERY GOOD Cond. - 1955 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #506016 - VERY GOOD Cond. - 1955 ♕♕♕
$1,599.00
Time Remaining: 29d 3h 11m
Buy It Now for only: $1,599.00

1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
$9.99
Time Remaining: 3d 15h 36m
Buy It Now for only: $9.99

♕♕♕ RARE - CURTA Calculator TYPE II #545714 - VERY GOOD Cond. - 1968 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #545714 - VERY GOOD Cond. - 1968 ♕♕♕
$1,299.00
Time Remaining: 29d 3h 3m
Buy It Now for only: $1,299.00

Curta Type I  mechanical calculator NEAR MINT and PERFECT WORKING w/can+manuals
Curta Type I mechanical calculator NEAR MINT and PERFECT WORKING w/can+manuals
$1,575.00
Time Remaining: 5d 15h 20m
Buy It Now for only: $1,575.00

1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
$21.99
Time Remaining: 3d 15h 36m
Buy It Now for only: $21.99

Curta Type I mechanical calculator in PERFECT WORKING ORDER w/metal can+manuals
Curta Type I mechanical calculator in PERFECT WORKING ORDER w/metal can+manuals
$1,400.00
Time Remaining: 24d 8h 1m
Buy It Now for only: $1,400.00

1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
$32.99
Time Remaining: 3d 15h 36m
Buy It Now for only: $32.99

1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
$14.99
Time Remaining: 3d 15h 36m
Buy It Now for only: $14.99

1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
1952 - Curta Pocket Calculator - C. Herzstark - Patent Art Poster
$9.99
Time Remaining: 3d 15h 36m
Buy It Now for only: $9.99

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$19.95
Time Remaining: 17d 12h 32m
Buy It Now for only: $19.95

♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕
♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕
$199.00
Time Remaining: 2d 5h 26m
Buy It Now for only: $199.00

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