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 1958 Curta Calculator Type 1 No. 40555 With Metal Can, Box, Manuals
Vintage 1958 Curta Calculator Type 1 No. 40555 With Metal Can, Box, Manuals
$1,399.00
Time Remaining: 6d 7h 7m
Buy It Now for only: $1,399.00

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 23d 12h 4m
Buy It Now for only: $19.95

Vintage C.1954 Curta Type 1 Calculator w/ Case
Vintage C.1954 Curta Type 1 Calculator w/ Case
$1,399.00
Time Remaining: 29d 9h 15m
Buy It Now for only: $1,399.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$19.95
Time Remaining: 12d 9h 26m
Buy It Now for only: $19.95

CURTA TYPE II CALCULATOR #522844 w/ metal can and 2 manuals
CURTA TYPE II CALCULATOR #522844 w/ metal can and 2 manuals
$1,849.00
Time Remaining: 27d 9h 49m
Buy It Now for only: $1,849.00

Curta Type II Calculator S/N #524089 in Mint Condition - NO RESERVE AUCTION
Curta Type II Calculator S/N #524089 in Mint Condition - NO RESERVE AUCTION
$1,284.00 (18 Bids)
Time Remaining: 1d 20h 2m

♕♕♕ 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: 2d 1h 21m
Buy It Now for only: $199.00

CURTA TYPE i CALCULATOR 1957 NO. 38697
CURTA TYPE i CALCULATOR 1957 NO. 38697
$1,599.00
Time Remaining: 8d 3h 50m
Buy It Now for only: $1,599.00

CURTA calculator Type II, nr 537972, marked: MIT EMPFEHLUNG PLASTIMA GMBH
CURTA calculator Type II, nr 537972, marked: MIT EMPFEHLUNG PLASTIMA GMBH
$1,199.00
Time Remaining: 27d 15h 37m
Buy It Now for only: $1,199.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #506874 - GOOD STATE - 1955 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #506874 - GOOD STATE - 1955 ♕♕♕
$1,299.00
Time Remaining: 5d 13h 28m
Buy It Now for only: $1,299.00

CURTA TYPE II CALCULATOR in MINT STATE, #557123 w/ plastic can and two manuals
CURTA TYPE II CALCULATOR in MINT STATE, #557123 w/ plastic can and two manuals
$1,495.00
Time Remaining: 4d 19h 15m
Buy It Now for only: $1,495.00

CURTA TYPE II Calculator COMPLETE SET w/ original box, can, manuals, NEVER USED
CURTA TYPE II Calculator COMPLETE SET w/ original box, can, manuals, NEVER USED
$1,695.00
Time Remaining: 1d 19h 45m
Buy It Now for only: $1,695.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #509561 - VERY GOOD STATE - 1956 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #509561 - VERY GOOD STATE - 1956 ♕♕♕
$1,299.00
Time Remaining: 26d 4h 45m
Buy It Now for only: $1,299.00

RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
$59.99
Time Remaining: 25d 4h 39m
Buy It Now for only: $59.99

CURTA Type 1 Calculator Made in Liechtenstein
CURTA Type 1 Calculator Made in Liechtenstein
$2,440.00
Time Remaining: 17d 3h 39m
Buy It Now for only: $2,440.00

CURTA Type 2 Calculator Made in Liechtenstein
CURTA Type 2 Calculator Made in Liechtenstein
$2,870.00
Time Remaining: 17d 3h 38m
Buy It Now for only: $2,870.00

♕♕♕ RARE - BOXED CURTA Calculator TYPE II #554901 - VERY GOOD Cond - 1969 ♕♕♕
♕♕♕ RARE - BOXED CURTA Calculator TYPE II #554901 - VERY GOOD Cond - 1969 ♕♕♕
$1,399.00
Time Remaining: 25d 7h 7m
Buy It Now for only: $1,399.00

Curta Calculator Instruction Manual
Curta Calculator Instruction Manual
$6.00
Time Remaining: 20d 7h 1m
Buy It Now for only: $6.00

VERY RARE AND EXCEPTIONAL C.1954 Curta Type 1 Calculator #27713 W/ Original Case
VERY RARE AND EXCEPTIONAL C.1954 Curta Type 1 Calculator #27713 W/ Original Case
$1,399.99
Time Remaining: 9d 4h 26m
Buy It Now for only: $1,399.99

RARE - O-ring for CURTA Calculator TYPE I or TYPE II - Joint Dichtungsring Oring
RARE - O-ring for CURTA Calculator TYPE I or TYPE II - Joint Dichtungsring Oring
$14.99
Time Remaining: 21d 9h 55m
Buy It Now for only: $14.99

♕♕♕ RARE - Early CURTA Calculator TYPE II #505009 - VERY GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #505009 - VERY GOOD STATE - 1954 ♕♕♕
$1,299.00
Time Remaining: 25d 6h 40m
Buy It Now for only: $1,299.00

RARE - CURTA Calculator TYPE I or II Plastic CLEARING LEVER
RARE - CURTA Calculator TYPE I or II Plastic CLEARING LEVER
$59.99
Time Remaining: 13d 1h 48m
Buy It Now for only: $59.99

♕♕♕ UNIQUE !!! RARE - Wooden Box for CURTA Calculators TYPE II - GOOD STATE ♕♕♕
♕♕♕ UNIQUE !!! RARE - Wooden Box for CURTA Calculators TYPE II - GOOD STATE ♕♕♕
$399.00
Time Remaining: 24d 5h 53m
Buy It Now for only: $399.00

♕♕♕ RARE - BOXED CURTA Calculator TYPE II #549649 - VERY GOOD CD 1969 PRIME ♕♕♕
♕♕♕ RARE - BOXED CURTA Calculator TYPE II #549649 - VERY GOOD CD 1969 PRIME ♕♕♕
$1,399.00
Time Remaining: 26d 6h 14m
Buy It Now for only: $1,399.00

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