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 2 Mechanical Calculator #528815 - VIDEO OF OPERATION
CURTA TYPE II 2 Mechanical Calculator #528815 - VIDEO OF OPERATION
$1,160.00
Time Remaining: 21d 21h 46m
Buy It Now for only: $1,160.00

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 25d 15h 59m
Buy It Now for only: $19.95

CURTA TYPE 1 CALCULATOR
CURTA TYPE 1 CALCULATOR
$1,000.00
Time Remaining: 1d 20h 23m

Vintage CURTA Type II Mechanical Calculator With Meta Black Case
Vintage CURTA Type II Mechanical Calculator With Meta Black Case
$835.99
Time Remaining: 2d 20h 53m

CURTA CALCULATOR TYPE II.  SERIAL NO. 501057. MANUFACTURING DATE JUNE 1953.
CURTA CALCULATOR TYPE II. SERIAL NO. 501057. MANUFACTURING DATE JUNE 1953.
$1,300.00
Time Remaining: 20d 20h 41m
Buy It Now for only: $1,300.00

♕♕♕ RARE - Early CURTA Calculator TYPE I # 40995 Very GOOD Cond 1952 By Contina
♕♕♕ RARE - Early CURTA Calculator TYPE I # 40995 Very GOOD Cond 1952 By Contina
$800.00
Time Remaining: 19h 57m
Buy It Now for only: $1,050.00

CURTA TYPE II 2 Mechanical Calculator #557419 Gray Body Liechtenstein w/ Case
CURTA TYPE II 2 Mechanical Calculator #557419 Gray Body Liechtenstein w/ Case
$1,695.00
Time Remaining: 18d 10h 59m
Buy It Now for only: $1,695.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$19.95
Time Remaining: 14d 13h 21m
Buy It Now for only: $19.95

CURTA type I calculator with can, serial number 68 335 (composite number).
CURTA type I calculator with can, serial number 68 335 (composite number).
$950.00
Time Remaining: 5d 3h 49m
Buy It Now for only: $950.00

Vintage C.1954 Curta Type 1 Calculator w/ Case
Vintage C.1954 Curta Type 1 Calculator w/ Case
$1,399.00
Time Remaining: 1d 13h 11m
Buy It Now for only: $1,399.00

♕♕♕ RARE - BOXED CURTA Calculator TYPE I #49750 - VERY GOOD Cond - 1962 ♕♕♕
♕♕♕ RARE - BOXED CURTA Calculator TYPE I #49750 - VERY GOOD Cond - 1962 ♕♕♕
$1,299.00
Time Remaining: 19d 8h 29m
Buy It Now for only: $1,299.00

♕♕♕ RARE - CURTA Calculator TYPE II #539865 - VERY GOOD Cond - 1967 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #539865 - VERY GOOD Cond - 1967 ♕♕♕
$1,099.00
Time Remaining: 18d 3h 51m
Buy It Now for only: $1,099.00

RARE - CURTA Calculator TYPE I or II Plastic CLEARING LEVER
RARE - CURTA Calculator TYPE I or II Plastic CLEARING LEVER
$59.99
Time Remaining: 29d 13h 43m
Buy It Now for only: $59.99

EXCEPTIONAL Curta Type 1 Calculator Mint Condition 66816
EXCEPTIONAL Curta Type 1 Calculator Mint Condition 66816
$2,895.00
Time Remaining: 2d 10h 59m
Buy It Now for only: $2,895.00

♕♕♕ RARE - Early CURTA Calculator TYPE 2 # 537704 VERY GOOD Cond- By Contina AG
♕♕♕ RARE - Early CURTA Calculator TYPE 2 # 537704 VERY GOOD Cond- By Contina AG
$649.99
Time Remaining: 9d 22h 27m

♕♕♕ RARE - Early CURTA Calculator TYPE I # 45353 VERY GOOD Cond- By Contina AG M
♕♕♕ RARE - Early CURTA Calculator TYPE I # 45353 VERY GOOD Cond- By Contina AG M
$670.89
Time Remaining: 9d 22h 18m

♕♕♕ 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: 4d 5h 16m
Buy It Now for only: $199.00

CURTA Type 1 Calculator Near Mint  With One Manual Included, Very Fine condition
CURTA Type 1 Calculator Near Mint With One Manual Included, Very Fine condition
$616.28 (4 Bids)
Time Remaining: 2d 21h 15m

♕♕♕ RARE - BOXED CURTA Calculator TYPE I #68569 - VERY GOOD Cond - 1967 ♕♕♕
♕♕♕ RARE - BOXED CURTA Calculator TYPE I #68569 - VERY GOOD Cond - 1967 ♕♕♕
$1,299.00
Time Remaining: 19d 8h 35m
Buy It Now for only: $1,299.00

CURTA Type 1 Calculator Liechtenstein W/ Case Used Working Vintage Rare
CURTA Type 1 Calculator Liechtenstein W/ Case Used Working Vintage Rare
$2,770.00
Time Remaining: 1d 21h 58m
Buy It Now for only: $2,770.00

Vintage Curta Type 2 Mechanical Calculator #521930 with original black case
Vintage Curta Type 2 Mechanical Calculator #521930 with original black case
$500.00 (1 Bid)
Time Remaining: 6d 13h 50m

CURTA Type 2 Calculator Liechtenstein W/ Case Used Working Vintage Rare
CURTA Type 2 Calculator Liechtenstein W/ Case Used Working Vintage Rare
$2,770.00
Time Remaining: 1d 21h 56m
Buy It Now for only: $2,770.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #505009 - VERY GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #505009 - VERY GOOD STATE - 1954 ♕♕♕
$1,299.00
Time Remaining: 27d 10h 35m
Buy It Now for only: $1,299.00

RARE Curta calculator TYPE I # 55439 # BOXED + MANUALS
RARE Curta calculator TYPE I # 55439 # BOXED + MANUALS
$499.90
Time Remaining: 2d 16h 10m

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