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:

1955 Demo Curta Handheld Calculator Very Rare
1955 Demo Curta Handheld Calculator Very Rare
$2,175.50 (15 Bids)
Time Remaining: 5d 18h 49m

♕♕♕ RARE - CURTA Calculator TYPE 2 #549251 - VERY GOOD STATE - 1967 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE 2 #549251 - VERY GOOD STATE - 1967 ♕♕♕
$1,100.00
Time Remaining: 2d 10h 11m
Buy It Now for only: $1,100.00

1963 Curta Calculator Type l #54509 w/Canister - EXCELLENT
1963 Curta Calculator Type l #54509 w/Canister - EXCELLENT
$949.00
Time Remaining: 17d 10h 39m
Buy It Now for only: $949.00

Rare Type I Curta Mechanical Calculator & Case Ser. #29749 (May 1955)
Rare Type I Curta Mechanical Calculator & Case Ser. #29749 (May 1955)
$1,123.93
Time Remaining: 17h 3m
Buy It Now for only: $1,123.93

Curta Calculator Type I #16968 w/ Cases & Manuals
Curta Calculator Type I #16968 w/ Cases & Manuals
$1,049.00
Time Remaining: 11d 17h 34m
Buy It Now for only: $1,049.00

 CURTA Calculator TYPE II #526718 - VERY GOOD
CURTA Calculator TYPE II #526718 - VERY GOOD
$630.00
Time Remaining: 6d 16h 35m

Rare Type II Curta Mechanical Calculator & Case Ser. #538961 (December 1966)
Rare Type II Curta Mechanical Calculator & Case Ser. #538961 (December 1966)
$1,201.44
Time Remaining: 11d 11h 1m
Buy It Now for only: $1,201.44

♕♕♕ RARE - CURTA Calculator TYPE I #55218 - VERY GOOD STATE - 1963 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #55218 - VERY GOOD STATE - 1963 ♕♕♕
$999.00
Time Remaining: 27d 22h 6m
Buy It Now for only: $999.00

♕♕♕ RARE - EARLY CURTA Calculator TYPE I #18638 - VERY GOOD STATE - 1952 ♕♕♕
♕♕♕ RARE - EARLY CURTA Calculator TYPE I #18638 - VERY GOOD STATE - 1952 ♕♕♕
$999.00
Time Remaining: 17d 8h 10m
Buy It Now for only: $999.00

 RARE - EARLY CURTA Calculator TYPE I #17083 - VERY GOOD STATE - 1952
RARE - EARLY CURTA Calculator TYPE I #17083 - VERY GOOD STATE - 1952
$450.00
Time Remaining: 6d 20h 56m
Buy It Now for only: $700.00

♕♕♕ RARE - LATE CURTA Calculator TYPE II #549976 - Very GOOD STATE - 1969 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #549976 - Very GOOD STATE - 1969 ♕♕♕
$999.00
Time Remaining: 27d 10h 7m
Buy It Now for only: $999.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 20d 7h 6m
Buy It Now for only: $19.95

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$18.95
Time Remaining: 26d 11h 14m
Buy It Now for only: $18.95

Rare Early Type I Curta Mechanical Calculator & Case Ser. #19739 (Oct 1952)
Rare Early Type I Curta Mechanical Calculator & Case Ser. #19739 (Oct 1952)
$1,147.19
Time Remaining: 17h 31m
Buy It Now for only: $1,147.19

Curta calculator, type II, serial no. 544440
Curta calculator, type II, serial no. 544440
$306.00 (4 Bids)
Time Remaining: 8d 19h 40m

Unusual Type II Curta Mechanical Calculator & Case Ser. #513241 (Nov. 1959)
Unusual Type II Curta Mechanical Calculator & Case Ser. #513241 (Nov. 1959)
$1,201.44
Time Remaining: 3d 8h 23m
Buy It Now for only: $1,201.44

♕♕♕ RARE - Early CURTA Calculator TYPE II #514414 - MINT STATE - 1960 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #514414 - MINT STATE - 1960 ♕♕♕
$2,599.00
Time Remaining: 11d 5h 16m
Buy It Now for only: $2,599.00

♕♕♕ RARE - LATE CURTA Calculator TYPE I #74730 - VERY GOOD STATE - 1969 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE I #74730 - VERY GOOD STATE - 1969 ♕♕♕
$999.00
Time Remaining: 3d 8h 46m
Buy It Now for only: $999.00

CURTA CALCULATOR SERVICE MANUALS I and II
CURTA CALCULATOR SERVICE MANUALS I and II
$1,200.00
Time Remaining: 4d 8h 27m

♕♕♕ RARE - Early CURTA Calculator TYPE II #506154 - MINT STATE - 1955 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #506154 - MINT STATE - 1955 ♕♕♕
$2,599.00
Time Remaining: 11d 5h 28m
Buy It Now for only: $2,599.00

♕♕♕ 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: 12d 8h 43m
Buy It Now for only: $1,199.00

♕♕♕ RARE - CURTA Calculator TYPE II #520192 - VERY GOOD STATE - 1962 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #520192 - VERY GOOD STATE - 1962 ♕♕♕
$1,099.00
Time Remaining: 27d 9h 37m
Buy It Now for only: $1,099.00

♕♕♕ RARE - CURTA Calculator TYPE I #63726 - VERY GOOD STATE - 1966 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #63726 - VERY GOOD STATE - 1966 ♕♕♕
$1,399.00
Time Remaining: 11d 7h 48m
Buy It Now for only: $1,399.00

Curta Calculator Type 2 1958 Low Production,  Reds Levers are grouped together
Curta Calculator Type 2 1958 Low Production, Reds Levers are grouped together
$999.00
Time Remaining: 1d 5h 14m

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