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 Calculator
Curta Calculator
$293.88 (4 Bids)
Time Remaining: 5d 6h 44m

RARE Vintage Type 1 Curta Mechanical Calculator #47675 Works w/case
RARE Vintage Type 1 Curta Mechanical Calculator #47675 Works w/case
$998.98
Time Remaining: 29d 1h 26m
Buy It Now for only: $998.98

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 20h 19m
Buy It Now for only: $19.95

CURTA Type I Calculator Machine Mint Condition with case serial # 72482
CURTA Type I Calculator Machine Mint Condition with case serial # 72482
$897.00
Time Remaining: 4d 1h 37m
Buy It Now for only: $897.00

Vintage 1950s CURTA CALCULATOR Type I No. 52777. Excellent Condition!
Vintage 1950s CURTA CALCULATOR Type I No. 52777. Excellent Condition!
$1,500.00
Time Remaining: 4d 13h 52m
Buy It Now for only: $1,500.00

Rare Late Curta Calculator Type 1
Rare Late Curta Calculator Type 1
$1,400.00
Time Remaining: 4d 20h 30m
Buy It Now for only: $1,400.00

♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
$999.00
Time Remaining: 21d 20h 2m
Buy It Now for only: $999.00

Vinatge 1951 Curta Type I Calculator No. 15062 - MINT
Vinatge 1951 Curta Type I Calculator No. 15062 - MINT
$1,999.99
Time Remaining: 26d 2h 11m
Buy It Now for only: $1,999.99

CURTA Type 1 Mechanical Calculator #64639 - System Curt Herzstark - with case
CURTA Type 1 Mechanical Calculator #64639 - System Curt Herzstark - with case
$700.00
Time Remaining: 5h 23m

♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕
♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕
$299.00
Time Remaining: 4d 15h 47m
Buy It Now for only: $299.00

RARE Vintage Collectible Curta Type 2 Mechanical Calculator Includes Provenance
RARE Vintage Collectible Curta Type 2 Mechanical Calculator Includes Provenance
$2,800.00
Time Remaining: 9d 2h 51m
Buy It Now for only: $2,800.00

♕♕♕ RARE - CURTA Calculator TYPE I #25194 - GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #25194 - GOOD STATE - 1954 ♕♕♕
$999.00
Time Remaining: 11d 21h 40m
Buy It Now for only: $999.00

CURTA-Computing examples for the Curta Calculator (booklet in english language)
CURTA-Computing examples for the Curta Calculator (booklet in english language)
$19.90
Time Remaining: 16d 6h 55m
Buy It Now for only: $19.90

Curta Manual Calculator
Curta Manual Calculator
$1,200.00
Time Remaining: 20d 20h 27m
Buy It Now for only: $1,200.00

Curta Calculator Type II. Made in Liechtenstein by Contina LTD Mauren
Curta Calculator Type II. Made in Liechtenstein by Contina LTD Mauren
$1,900.00
Time Remaining: 5d 7h 44m
Buy It Now for only: $1,900.00

♕♕♕ RARE - CURTA Calculator TYPE II #523927 - VERY GOOD STATE - 1963 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #523927 - VERY GOOD STATE - 1963 ♕♕♕
$1,299.00
Time Remaining: 16d 21h 1m
Buy It Now for only: $1,299.00

Curta Calculator Type 1 with original 3 manuals
Curta Calculator Type 1 with original 3 manuals
$355.67 (19 Bids)
Time Remaining: 20h 30m

CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
$19.95
Time Remaining: 10d 5h 34m
Buy It Now for only: $19.95

♕♕♕ RARE - VERY LATE CURTA Calculator TYPE I #80119 - MINT STATE - 1970 ♕♕♕
♕♕♕ RARE - VERY LATE CURTA Calculator TYPE I #80119 - MINT STATE - 1970 ♕♕♕
$1,599.00
Time Remaining: 4d 16h 52m
Buy It Now for only: $1,599.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$18.95
Time Remaining: 19d 22h 13m
Buy It Now for only: $18.95

♕♕♕ 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: 5d 19h 42m
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: 4d 16h 14m
Buy It Now for only: $3,999.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 13d 18h 5m
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)
$19.90
Time Remaining: 16d 6h 49m
Buy It Now for only: $19.90

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