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:

Rare Late Curta Calculator Type 1
Rare Late Curta Calculator Type 1
$1,000.00
Time Remaining: 1d 8h 4m

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 1d 9h 50m
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)
$19.00
Time Remaining: 12d 13h 36m
Buy It Now for only: $19.00

RARE Vintage Type 1 Curta Mechanical Calculator #47675 Works w/case
RARE Vintage Type 1 Curta Mechanical Calculator #47675 Works w/case
$998.98
Time Remaining: 29d 14h 57m
Buy It Now for only: $998.98

CURTA II Rechenmaschine Calculator #543527 (I370)
CURTA II Rechenmaschine Calculator #543527 (I370)
$202.50 (14 Bids)
Time Remaining: 2d 1h 29m
Buy It Now for only: $1,355.00

♕♕♕ RARE - CURTA Calculator TYPE I #24504 - GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #24504 - GOOD STATE - 1954 ♕♕♕
$1,099.00
Time Remaining: 1d 2h 49m
Buy It Now for only: $1,099.00

CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
$19.95
Time Remaining: 10d 19h 5m
Buy It Now for only: $19.95

♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
$999.00
Time Remaining: 22d 9h 33m
Buy It Now for only: $999.00

ORIGINAL CURTA TYPE II CALCULATOR & ORIGINAL CANISTER NICE CONDITION
ORIGINAL CURTA TYPE II CALCULATOR & ORIGINAL CANISTER NICE CONDITION
$563.33 (11 Bids)
Time Remaining: 2d 11h 57m

CURTA-Instructions for use of the Curta Calculator (booklet in english language)
CURTA-Instructions for use of the Curta Calculator (booklet in english language)
$19.00
Time Remaining: 16d 20h 20m
Buy It Now for only: $19.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 14d 7h 35m
Buy It Now for only: $19.95

Curta Type 1 calculator Mint Condition with Case
Curta Type 1 calculator Mint Condition with Case
$1,500.00
Time Remaining: 15d 9h 19m
Buy It Now for only: $1,500.00

1964 Vintage - Curta Calculator
1964 Vintage - Curta Calculator
$999.00
Time Remaining: 4d 12h 48m
Buy It Now for only: $1,799.00

♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD STATE - 1964 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD STATE - 1964 ♕♕♕
$1,199.00
Time Remaining: 1d 4h 51m
Buy It Now for only: $1,199.00

CURTA TYPE II CALCULATOR in NEW State w/ original can and  2 manuals, NEVER USED
CURTA TYPE II CALCULATOR in NEW State w/ original can and 2 manuals, NEVER USED
$1,495.00
Time Remaining: 26d 7h 5m
Buy It Now for only: $1,495.00

Curta Manual Calculator
Curta Manual Calculator
$1,200.00
Time Remaining: 21d 19h 57m
Buy It Now for only: $1,200.00

RARE - Leather Case Canister CURTA Calculator
RARE - Leather Case Canister CURTA Calculator
$149.99
Time Remaining: 6d 15h 8m
Buy It Now for only: $249.99

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
$1,999.99
Time Remaining: 26d 15h 42m
Buy It Now for only: $1,999.99

♕♕♕ RARE - CURTA Calculator TYPE I #25194 - GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #25194 - GOOD STATE - 1954 ♕♕♕
$999.00
Time Remaining: 12d 11h 11m
Buy It Now for only: $999.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$18.95
Time Remaining: 20d 11h 44m
Buy It Now for only: $18.95

Curta Calculator 1950 - 1951
Curta Calculator 1950 - 1951
$900.00
Time Remaining: 2d 12h 23m

1970's Curta -Type II Calculator
1970's Curta -Type II Calculator
$990.00
Time Remaining: 4d 15h 21m
Buy It Now for only: $990.00

♕♕♕ 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: 5d 5h 45m
Buy It Now for only: $3,999.00

♕♕♕ RARE - LATE CURTA Calculator TYPE II #557711 - VERY GOOD STATE - 1970 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #557711 - VERY GOOD STATE - 1970 ♕♕♕
$1,299.00
Time Remaining: 1d 5h 10m
Buy It Now for only: $1,299.00

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