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:

Vintage Curta mechanical calculator rare type 1 with case
Vintage Curta mechanical calculator rare type 1 with case
$561.00 (9 Bids)
Time Remaining: 2h 8m

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 28d 20h 6m
Buy It Now for only: $19.95

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: 6d 7m
Buy It Now for only: $19.00

Early CURTA Peppermill Calculator TYPE I #32345 Feb. 1956
Early CURTA Peppermill Calculator TYPE I #32345 Feb. 1956
$1,295.00
Time Remaining: 1d 23h 44m
Buy It Now for only: $1,295.00

Rare Type II Curta Mechanical Calculator & Case Ser. #515906 (October 1960)
Rare Type II Curta Mechanical Calculator & Case Ser. #515906 (October 1960)
$1,143.60
Time Remaining: 24d 22h 12m
Buy It Now for only: $1,143.60

VINTAGE CURTA TYPE II  CALCULATOR 524790 by Contina Ltd. Mauren - August 1963
VINTAGE CURTA TYPE II CALCULATOR 524790 by Contina Ltd. Mauren - August 1963
$800.00
Time Remaining: 4d 1h 39m
Buy It Now for only: $1,040.00

CURTA CALCULATOR TYPE I SERIAL #62400 EXC CONDITION CANISTER & INSTRUCTIONS
CURTA CALCULATOR TYPE I SERIAL #62400 EXC CONDITION CANISTER & INSTRUCTIONS
$1,595.00
Time Remaining: 7d 23h 37m
Buy It Now for only: $1,595.00

RARE Curta type II Mechanical Calculator # 524325 [Ref.8279]
RARE Curta type II Mechanical Calculator # 524325 [Ref.8279]
$1,900.00
Time Remaining: 1d 23h 48m
Buy It Now for only: $1,900.00

VERY RARE Curta Calculator Type II Hand Made Black Thick Leather Cover Canister
VERY RARE Curta Calculator Type II Hand Made Black Thick Leather Cover Canister
$250.00
Time Remaining: 29d 20h 51m
Buy It Now for only: $250.00

CURTA Mechanical Calculator
CURTA Mechanical Calculator
$16.36 (3 Bids)
Time Remaining: 3d 1h 36m

♕♕♕ RARE - EARLY CURTA Calculator TYPE I #18638 - VERY GOOD STATE - 1952 ♕♕♕
♕♕♕ RARE - EARLY CURTA Calculator TYPE I #18638 - VERY GOOD STATE - 1952 ♕♕♕
$1,299.00
Time Remaining: 8d 18h 55m
Buy It Now for only: $1,299.00

♕♕♕ 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: 6d 10h 32m
Buy It Now for only: $1,199.00

♕♕♕ 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: 2d 16h
Buy It Now for only: $3,999.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 11d 17h 51m
Buy It Now for only: $19.95

CURTA CALCULATOR I and II SERVICE MANUALS
CURTA CALCULATOR I and II SERVICE MANUALS
$1,200.00
Time Remaining: 5d 22h 57m

♕♕♕ RARE - CURTA Calculator TYPE II #527953 - VERY GOOD STATE - 1964 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #527953 - VERY GOOD STATE - 1964 ♕♕♕
$1,199.00
Time Remaining: 18d 20h 26m
Buy It Now for only: $1,199.00

♕♕♕ UNIQUE !!! RARE - Wooden Box for CURTA Calculators TYPE II - GOOD STATE ♕♕♕
♕♕♕ UNIQUE !!! RARE - Wooden Box for CURTA Calculators TYPE II - GOOD STATE ♕♕♕
$799.00
Time Remaining: 8d 20h 30m
Buy It Now for only: $799.00

♕♕♕ RARE - LATE CURTA Calculator TYPE II #549976 - Very GOOD STATE - 1969 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #549976 - Very GOOD STATE - 1969 ♕♕♕
$1,199.00
Time Remaining: 18d 20h 52m
Buy It Now for only: $1,199.00

 CURTA Calculator TYPE I 1962 No. 50567 Rare Peppermill Vintage Very Fine
CURTA Calculator TYPE I 1962 No. 50567 Rare Peppermill Vintage Very Fine
$1,150.00
Time Remaining: 22h 49m
Buy It Now for only: $1,495.00

♕♕♕ RARE - LATE CURTA Calculator TYPE II #557711 - VERY GOOD STATE - 1970 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #557711 - VERY GOOD STATE - 1970 ♕♕♕
$1,199.00
Time Remaining: 28d 15h 26m
Buy It Now for only: $1,199.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #513740 - GOOD STATE - 1960 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #513740 - GOOD STATE - 1960 ♕♕♕
$1,199.00
Time Remaining: 24d 20h 22m
Buy It Now for only: $1,199.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$18.95
Time Remaining: 17d 21h 59m
Buy It Now for only: $18.95

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: 24d 1h 57m
Buy It Now for only: $1,999.99

Rare c1960 Type II Serial No. 513470 Curta Calculator
Rare c1960 Type II Serial No. 513470 Curta Calculator
$761.00 (5 Bids)
Time Remaining: 1d 1h 48m

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