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 Type II Precision Calculator Original Case Beautiful Condition
Curta Type II Precision Calculator Original Case Beautiful Condition
$900.00
Time Remaining: 23h 30m

CURTA Type 1 Precision Calculator Original Case SN 70420 Beautiful Condition
CURTA Type 1 Precision Calculator Original Case SN 70420 Beautiful Condition
$1,100.00
Time Remaining: 17d 19h 48m
Buy It Now for only: $1,100.00

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 26d 21h 1m
Buy It Now for only: $19.95

VERY RARE AND EXCEPTIONAL C.1952 Curta Type 1 Calculator #19598 W/ Original Case
VERY RARE AND EXCEPTIONAL C.1952 Curta Type 1 Calculator #19598 W/ Original Case
$1,800.00
Time Remaining: 23d 20h 8m
Buy It Now for only: $1,800.00

Curta Calculator Type II
Curta Calculator Type II
$1,212.12
Time Remaining: 15d 20h 49m
Buy It Now for only: $1,212.12

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$19.95
Time Remaining: 15d 18h 23m
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
$1,799.00
Time Remaining: 18h 46m
Buy It Now for only: $1,799.00

Vintage C.1954 Curta Type 1 Calculator w/ Case
Vintage C.1954 Curta Type 1 Calculator w/ Case
$1,399.00
Time Remaining: 2d 18h 12m
Buy It Now for only: $1,399.00

c.1957 Vintage Type 1 Curta Calculator in Original Canister - No.37361
c.1957 Vintage Type 1 Curta Calculator in Original Canister - No.37361
$1,116.51
Time Remaining: 29d 12h 39m
Buy It Now for only: $1,116.51

rare CURTA calculator TYPE II #547893 excellent condition , with accessories
rare CURTA calculator TYPE II #547893 excellent condition , with accessories
$750.00
Time Remaining: 1d 22h 3m

CURTA Type II Calculator with Leather Case - Excellent Condition
CURTA Type II Calculator with Leather Case - Excellent Condition
$1,000.00
Time Remaining: 1d 18h 19m
Buy It Now for only: $1,400.00

♕♕♕ 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: 8d 22h 25m
Buy It Now for only: $1,299.00

Curta Type II Precision Calculator Original Case Beautiful Condition
Curta Type II Precision Calculator Original Case Beautiful Condition
$1,000.00
Time Remaining: 3d 22h 59m

♕♕♕ 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: 5d 10h 18m
Buy It Now for only: $199.00

Curta Type II Precision Calculator Original Case SN 551633 Beautiful Condition
Curta Type II Precision Calculator Original Case SN 551633 Beautiful Condition
$1,500.00
Time Remaining: 17d 19h 11m
Buy It Now for only: $1,500.00

♕♕♕ 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: 28d 15h 37m
Buy It Now for only: $1,299.00

Curta Calculator Instruction Manual
Curta Calculator Instruction Manual
$6.00
Time Remaining: 23d 15h 58m
Buy It Now for only: $6.00

curta type ii calculator
curta type ii calculator
$2,100.00
Time Remaining: 6d 5h 15m

RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
$59.99
Time Remaining: 28d 13h 36m
Buy It Now for only: $59.99

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
$1,199.99
Time Remaining: 12d 13h 23m
Buy It Now for only: $1,199.99

CURTA Type 1 Calculator Near Mint
CURTA Type 1 Calculator Near Mint
$670.00 (8 Bids)
Time Remaining: 6d 4h 59m

CURTA TYPE II CALCULATOR in NEAR MINT STATE, #528951 w/ metal can and 2 manuals
CURTA TYPE II CALCULATOR in NEAR MINT STATE, #528951 w/ metal can and 2 manuals
$1,495.00
Time Remaining: 2d 3h 59m
Buy It Now for only: $1,495.00

♕♕♕ 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: 29d 13h 42m
Buy It Now for only: $1,299.00

CURTA Type 1 Calculator Made in Liechtenstein
CURTA Type 1 Calculator Made in Liechtenstein
$2,440.00
Time Remaining: 20d 12h 36m
Buy It Now for only: $2,440.00

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