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:

Early CURTA Calculator TYPE II -MINT STATE!! Everything Original and Included!!
Early CURTA Calculator TYPE II -MINT STATE!! Everything Original and Included!!
$750.00 (1 Bid)
Time Remaining: 1d 14h 34m

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 10d 12h 23m
Buy It Now for only: $19.95

CURTA-Computing examples for the Curta Calculator (booklet in english language)
CURTA-Computing examples for the Curta Calculator (booklet in english language)
$19.90
Time Remaining: 25d 22h 58m
Buy It Now for only: $19.90

♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
$999.00
Time Remaining: 1d 12h 5m
Buy It Now for only: $999.00

♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕
♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕
$299.00
Time Remaining: 14d 7h 50m
Buy It Now for only: $299.00

CURTA Type I Calculator Machine
CURTA Type I Calculator Machine
$999.00
Time Remaining: 1d 22h 48m

Rare Late Curta Calculator Type 1
Rare Late Curta Calculator Type 1
$1,800.00
Time Remaining: 4d 11h 11m
Buy It Now for only: $1,800.00

♕♕♕ RARE - CURTA Calculator TYPE I #25194 - GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #25194 - GOOD STATE - 1954 ♕♕♕
$999.00
Time Remaining: 21d 13h 43m
Buy It Now for only: $999.00

♕♕♕ RARE - CURTA Calculator TYPE II #523927 - VERY GOOD STATE - 1963 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #523927 - VERY GOOD STATE - 1963 ♕♕♕
$1,299.00
Time Remaining: 26d 13h 4m
Buy It Now for only: $1,299.00

T401) CURTA TYPE II CALCULATOR METAL CASE ORIG GUARANTEE PAPERWORK 1959
T401) CURTA TYPE II CALCULATOR METAL CASE ORIG GUARANTEE PAPERWORK 1959
$499.00 (1 Bid)
Time Remaining: 4d 11h 26m

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: 18d 18h 54m
Buy It Now for only: $2,800.00

CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
$19.95
Time Remaining: 19d 21h 37m
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)
$19.90
Time Remaining: 25d 22h 52m
Buy It Now for only: $19.90

Curta Calculator Type II. Made in Liechtenstein by Contina LTD Mauren
Curta Calculator Type II. Made in Liechtenstein by Contina LTD Mauren
$2,200.00
Time Remaining: 14d 23h 47m
Buy It Now for only: $2,200.00

RARE Curta Mechanical Calculator Type I  60481 with leather case Great Condition
RARE Curta Mechanical Calculator Type I 60481 with leather case Great Condition
$609.99
Time Remaining: 4d 13h 13m
Buy It Now for only: $799.99

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 23d 10h 8m
Buy It Now for only: $19.95

♕♕♕ RARE - Early CURTA Calculator TYPE II #514414 - MINT STATE - 1960 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #514414 - MINT STATE - 1960 ♕♕♕
$3,999.00
Time Remaining: 14d 8h 17m
Buy It Now for only: $3,999.00

♕♕♕ RARE - LATE CURTA Calculator TYPE I #66765 - VERY GOOD STATE - 1967 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE I #66765 - VERY GOOD STATE - 1967 ♕♕♕
$1,199.00
Time Remaining: 15d 11h 45m
Buy It Now for only: $1,199.00

 CURTA  CALCULATOR  TYPE  I I,  No.548123, 1965
CURTA CALCULATOR TYPE I I, No.548123, 1965
$559.47 (11 Bids)
Time Remaining: 1d 15h 59m

♕♕♕ RARE - VERY LATE CURTA Calculator TYPE I #80119 - MINT STATE - 1970 ♕♕♕
♕♕♕ RARE - VERY LATE CURTA Calculator TYPE I #80119 - MINT STATE - 1970 ♕♕♕
$1,599.00
Time Remaining: 14d 8h 55m
Buy It Now for only: $1,599.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$18.95
Time Remaining: 29d 14h 16m
Buy It Now for only: $18.95

CURTA II Rechenmaschine Calculator #543527 (I370)
CURTA II Rechenmaschine Calculator #543527 (I370)
$1,355.00
Time Remaining: 6d 4h 16m
Buy It Now for only: $1,355.00

♕♕♕ UNIQUE !!! RARE - Wooden Box for CURTA Calculators TYPE II - GOOD STATE ♕♕♕
♕♕♕ UNIQUE !!! RARE - Wooden Box for CURTA Calculators TYPE II - GOOD STATE ♕♕♕
$999.00
Time Remaining: 20d 12h 47m
Buy It Now for only: $999.00

Curta Mechanical Calculator
Curta Mechanical Calculator
$405.00 (6 Bids)
Time Remaining: 2d 17h 3m

« Previous12
Permalink