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 II with original case and manuals
Curta Calculator Type II with original case and manuals
$1,500.00
Time Remaining: 29d 22h 38m
Buy It Now for only: $1,500.00

1960 CURTA CALCULATOR - TYPE II  #516229 with metal container.
1960 CURTA CALCULATOR - TYPE II #516229 with metal container.
$599.00 (2 Bids)
Time Remaining: 10h 4m

Curta Calculator Type II Plastic Case Only
Curta Calculator Type II Plastic Case Only
$265.00
Time Remaining: 29d 22h 39m
Buy It Now for only: $265.00

CURTA TYPE II CALCULATOR with Original booklets - S/N 503669
CURTA TYPE II CALCULATOR with Original booklets - S/N 503669
$1,150.00
Time Remaining: 25d 3h 27m
Buy It Now for only: $1,150.00

  CURTA TYPE II CALCULATOR w/ Original Case Manuals Box Serial # 545199
CURTA TYPE II CALCULATOR w/ Original Case Manuals Box Serial # 545199
$1,999.99
Time Remaining: 6d 6h 51m
Buy It Now for only: $1,999.99

Curta Type I mechanical calculator #62276 rare near mint condition
Curta Type I mechanical calculator #62276 rare near mint condition
$999.99
Time Remaining: 2d 8h 44m

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 2d 10h 2m
Buy It Now for only: $19.95

♕♕♕ RARE - CURTA Calculator TYPE I #31423 - GOOD STATE - 1955 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #31423 - GOOD STATE - 1955 ♕♕♕
$999.00
Time Remaining: 13d 16h 7m
Buy It Now for only: $999.00

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: 1d 10h 52m
Buy It Now for only: $1,595.00

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
$1,440.00
Time Remaining: 25d 5h 26m
Buy It Now for only: $1,440.00

♕♕♕ RARE - CURTA Calculator TYPE I #31260 - GOOD Condition - 1955 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #31260 - GOOD Condition - 1955 ♕♕♕
$899.00
Time Remaining: 5d 23h 23m
Buy It Now for only: $899.00

CURTA TYPE II MECHANICAL CALCULATOR EXCELLENT OPERATIONAL & LITTLE TO NO WEAR
CURTA TYPE II MECHANICAL CALCULATOR EXCELLENT OPERATIONAL & LITTLE TO NO WEAR
$1,000.00
Time Remaining: 9d 22h 44m
Buy It Now for only: $1,000.00

Mint Curta Calculator Type II With Leather Case & Metal Case
Mint Curta Calculator Type II With Leather Case & Metal Case
$850.00
Time Remaining: 6d 5h 42m

CURTA Mechanical Calculator Serial # 70246 WITH BOX & MANUELS!
CURTA Mechanical Calculator Serial # 70246 WITH BOX & MANUELS!
$1,750.00
Time Remaining: 9d 2h 40m
Buy It Now for only: $1,750.00

♕♕♕ RARE - CURTA Calculator TYPE II #512553 - VERY GOOD Condition - 1959 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #512553 - VERY GOOD Condition - 1959 ♕♕♕
$1,099.00
Time Remaining: 5d 23h 8m
Buy It Now for only: $1,099.00

CURTA TYPE 2 CALCULATOR #546972 Cotina Mauren Instrument Counter
CURTA TYPE 2 CALCULATOR #546972 Cotina Mauren Instrument Counter
$630.00 (12 Bids)
Time Remaining: 1d 9h 41m

♕♕♕ RARE - Early CURTA Calculator TYPE I #4081 - VERY GOOD STATE - 1948 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE I #4081 - VERY GOOD STATE - 1948 ♕♕♕
$1,799.00
Time Remaining: 3d 17h 29m
Buy It Now for only: $1,799.00

RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
$59.99
Time Remaining: 15d 15h 34m
Buy It Now for only: $59.99

♕♕♕ RARE - LATE CURTA Calculator TYPE I #64235 - NEAR MINT STATE - 1966 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE I #64235 - NEAR MINT STATE - 1966 ♕♕♕
$1,299.00
Time Remaining: 11d 20h 57m
Buy It Now for only: $1,299.00

Very Rare Curta Calculator TYPE 1 #12446 Excellent Condition - 1950. With case.
Very Rare Curta Calculator TYPE 1 #12446 Excellent Condition - 1950. With case.
$1,399.00
Time Remaining: 5d 17h 48m
Buy It Now for only: $1,399.00

♕♕♕ RARE - LATE CURTA Calculator TYPE I #75490 - VERY GOOD STATE - 1969 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE I #75490 - VERY GOOD STATE - 1969 ♕♕♕
$1,199.00
Time Remaining: 11d 20h 52m
Buy It Now for only: $1,199.00

Curta Calculator Type II
Curta Calculator Type II
$860.00
Time Remaining: 6d 3h 1m

♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD Condition - 1964 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD Condition - 1964 ♕♕♕
$1,099.00
Time Remaining: 5d 23h 31m
Buy It Now for only: $1,099.00

♕♕♕ RARE - CURTA Calculator TYPE II #514414 - Near MINT STATE - 1960 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #514414 - Near MINT STATE - 1960 ♕♕♕
$1,799.00
Time Remaining: 7d 20h 9m
Buy It Now for only: $1,799.00

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