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 Type II Curta Calculator No. 526609 Excellent Condition!!
Rare Type II Curta Calculator No. 526609 Excellent Condition!!
$999.00
Time Remaining: 3d 22h 49m
Buy It Now for only: $999.00

♕♕♕ RARE - CURTA Calculator TYPE II #520116 - Very Good STATE - 1962 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #520116 - Very Good STATE - 1962 ♕♕♕
$1,099.00
Time Remaining: 23d 18h 15m
Buy It Now for only: $1,099.00

CURTA Calculator TYPE I #62044 - with Canister, Box and Manual
CURTA Calculator TYPE I #62044 - with Canister, Box and Manual
$999.00
Time Remaining: 7d 3h 40m
Buy It Now for only: $999.00

♕♕♕ 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: 21d 17h 45m
Buy It Now for only: $999.00

CURTA Calculator TYPE I #32829 - with Canister and Manual
CURTA Calculator TYPE I #32829 - with Canister and Manual
$999.00
Time Remaining: 7d 3h 49m
Buy It Now for only: $999.00

♕♕♕ RARE - CURTA Calculator TYPE I #40025 - VERY GOOD STATE - 1958 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #40025 - VERY GOOD STATE - 1958 ♕♕♕
$1,099.00
Time Remaining: 29d 11h 40m
Buy It Now for only: $1,099.00

CURTA TYPE II CALCULATOR (Great Conditio). No529336
CURTA TYPE II CALCULATOR (Great Conditio). No529336
$999.00
Time Remaining: 3d 23h 47m

CURTA Type II Calculator  Serial 541392 (May 1967) with Case Excellent
CURTA Type II Calculator Serial 541392 (May 1967) with Case Excellent
$1,550.00
Time Remaining: 20d 23h 15m
Buy It Now for only: $1,550.00

♕♕♕ RARE - CURTA Calculator TYPE I #31423 - GOOD STATE - 1955 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #31423 - GOOD STATE - 1955 ♕♕♕
$999.00
Time Remaining: 9d 10h 53m
Buy It Now for only: $999.00

CURTA TYPE II CALCULATOR in VERY GOOD COND. w/ plastic can and 2 manuals
CURTA TYPE II CALCULATOR in VERY GOOD COND. w/ plastic can and 2 manuals
$1,295.00
Time Remaining: 14d 19h 54m
Buy It Now for only: $1,295.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 8d 16h 5m
Buy It Now for only: $19.95

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 28d 4h 48m
Buy It Now for only: $19.95

CURTA I / rare calculator / System Curt Herzstark/ Liechtenstein/in Original Box
CURTA I / rare calculator / System Curt Herzstark/ Liechtenstein/in Original Box
$455.00 (21 Bids)
Time Remaining: 8d 15h 2m

CURTA TYPE 1 SERIAL #14895 RARE VINTAGE CALCULATOR WORKS PERFECTLY!
CURTA TYPE 1 SERIAL #14895 RARE VINTAGE CALCULATOR WORKS PERFECTLY!
$1,220.00
Time Remaining: 9d 9h 20m
Buy It Now for only: $1,220.00

RARE EARLY 1956 ALL BLACK CURTA Type II Calculator Low SN #508592 w/can, manuals
RARE EARLY 1956 ALL BLACK CURTA Type II Calculator Low SN #508592 w/can, manuals
$1,695.00
Time Remaining: 14d 19h 24m
Buy It Now for only: $1,695.00

Curta Calculator Model II  1957
Curta Calculator Model II 1957
$800.00 (1 Bid)
Time Remaining: 4d 3h 23m

Vinatge 1951 Curta Type I Calculator No. 15062 - MINT w/ Original
Vinatge 1951 Curta Type I Calculator No. 15062 - MINT w/ Original
$1,800.00
Time Remaining: 21d 11m
Buy It Now for only: $1,800.00

Type I Curta Calculator & Case Ser. #43931 (September 1963) - Very Near Mint!
Type I Curta Calculator & Case Ser. #43931 (September 1963) - Very Near Mint!
$1,268.85
Time Remaining: 12d 19h 42m
Buy It Now for only: $1,268.85

CURTA-Computing examples for the Curta Calculator (booklet in english language)
CURTA-Computing examples for the Curta Calculator (booklet in english language)
$19.50
Time Remaining: 1d 14h 33m
Buy It Now for only: $19.50

♕♕♕ 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: 9d 11h 44m
Buy It Now for only: $399.00

Immaculated CURTA Type II Calculator - SN 548525 with original box and manuals
Immaculated CURTA Type II Calculator - SN 548525 with original box and manuals
$1,595.00
Time Remaining: 16d 15h 43m
Buy It Now for only: $1,595.00

CURTA-Instructions for use of the Curta Calculator (booklet in english language)
CURTA-Instructions for use of the Curta Calculator (booklet in english language)
$19.50
Time Remaining: 2d 13h 39m
Buy It Now for only: $19.50

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$18.95
Time Remaining: 14d 20h 13m
Buy It Now for only: $18.95

Curta Calculator Instruction Manual
Curta Calculator Instruction Manual
$6.00
Time Remaining: 15d 1h 8m
Buy It Now for only: $6.00

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