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 Calculator Type I Machine Original Metal Case
Curta Calculator Type I Machine Original Metal Case
$815.00
Time Remaining: 21d 10h 37m
Buy It Now for only: $815.00

Curta Mechanical Calculator, Type 1
Curta Mechanical Calculator, Type 1
$900.00
Time Remaining: 28d 23h 51m
Buy It Now for only: $900.00

CURTA Calculator TYPE I #32641 - Good Condition
CURTA Calculator TYPE I #32641 - Good Condition
$699.99
Time Remaining: 1d 17h 44m
Buy It Now for only: $699.99

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 27d 6h 35m
Buy It Now for only: $19.95

CLEAN CLEAN Very Rare Curta Calculator TYPE 1 Excellent Condition - 1950s Case
CLEAN CLEAN Very Rare Curta Calculator TYPE 1 Excellent Condition - 1950s Case
$895.00
Time Remaining: 22d 3h 21m
Buy It Now for only: $895.00

Curta calculator
Curta calculator
$800.00
Time Remaining: 29d 23h 36m
Buy It Now for only: $800.00

♕♕♕ RARE - CURTA Calculator TYPE I #31260 - GOOD Condition - 1955 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #31260 - GOOD Condition - 1955 ♕♕♕
$899.00
Time Remaining: 19h 56m
Buy It Now for only: $899.00

Curta Calculator, Metal Case Only
Curta Calculator, Metal Case Only
$450.00
Time Remaining: 20d 21h 35m
Buy It Now for only: $450.00

♕♕♕ RARE - CURTA Calculator TYPE I #26195 - VERY GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #26195 - VERY GOOD STATE - 1954 ♕♕♕
$999.00
Time Remaining: 14d 22h 20m
Buy It Now for only: $999.00

CURTA Type II Calculator
CURTA Type II Calculator
$200.00 (1 Bid)
Time Remaining: 6d 21h 52m

♕♕♕ RARE - CURTA Calculator TYPE I #15519 - VERY GOOD STATE - 1951 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #15519 - VERY GOOD STATE - 1951 ♕♕♕
$999.00
Time Remaining: 3d 13h 49m
Buy It Now for only: $999.00

Vinatge 1951 Curta Type I Calculator No. 15062 - MINT w/ Original Box and Manual
Vinatge 1951 Curta Type I Calculator No. 15062 - MINT w/ Original Box and Manual
$1,259.99
Time Remaining: 25d 7h 49m
Buy It Now for only: $1,259.99

Very rare 1951 Curta Calculator Type I- SN 13562
Very rare 1951 Curta Calculator Type I- SN 13562
$1,099.00
Time Remaining: 9d 18h 34m
Buy It Now for only: $1,099.00

♕♕♕ 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: 3d 13h 56m
Buy It Now for only: $199.00

MINT Contina Curta Type 2 grey body calculator # 514912 1960 with metal can
MINT Contina Curta Type 2 grey body calculator # 514912 1960 with metal can
$1,600.00
Time Remaining: 24d 3h 27m
Buy It Now for only: $1,600.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$19.95
Time Remaining: 13d 22h
Buy It Now for only: $19.95

Antique CURTA Mechanical Calculator / Type 1 Serial #59048
Antique CURTA Mechanical Calculator / Type 1 Serial #59048
$999.00
Time Remaining: 10d 54m
Buy It Now for only: $999.00

CURTA Mechanical Calculator Serial # 70246 WITH BOX & MANUELS!
CURTA Mechanical Calculator Serial # 70246 WITH BOX & MANUELS!
$1,699.00
Time Remaining: 4d 22h 54m
Buy It Now for only: $1,699.00

RARE EARLY 1955 ALL BLACK CURTA Type II Calculator, Low #505306 -w/can+2 manuals
RARE EARLY 1955 ALL BLACK CURTA Type II Calculator, Low #505306 -w/can+2 manuals
$1,595.00
Time Remaining: 4d 50m
Buy It Now for only: $1,595.00

Very Rare Curta Calculator TYPE 1 #12446 Excellent Condition - 1950. With case.
Very Rare Curta Calculator TYPE 1 #12446 Excellent Condition - 1950. With case.
$1,199.00
Time Remaining: 18h 2m
Buy It Now for only: $1,199.00

♕♕♕ RARE - CURTA Calculator TYPE I #31423 - GOOD STATE - 1955 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #31423 - GOOD STATE - 1955 ♕♕♕
$999.00
Time Remaining: 8d 12h 40m
Buy It Now for only: $999.00

CURTA Type II Calculator
CURTA Type II Calculator
$1,200.00
Time Remaining: 1d 21h 35m
Buy It Now for only: $1,200.00

Curta Mechanical Calculator, Type 1
Curta Mechanical Calculator, Type 1
$1,500.00
Time Remaining: 3d 20h 33m
Buy It Now for only: $1,500.00

♕♕♕ RARE - CURTA Calculator TYPE II #538534 - VERY GOOD CONDITION - 1966 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #538534 - VERY GOOD CONDITION - 1966 ♕♕♕
$1,099.00
Time Remaining: 26d 18h 52m
Buy It Now for only: $1,099.00

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