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 Mechanical Calculator, Matching box, Condition is GREAT #74685
Curta Mechanical Calculator, Matching box, Condition is GREAT #74685
$1,695.00
Time Remaining: 1d 4h 23m

 Curta Type I  Rare  Mechanical Calculator & Case With Box & Papers  # 57192
Curta Type I Rare Mechanical Calculator & Case With Box & Papers # 57192
$1,650.00
Time Remaining: 6d 16h 45m
Buy It Now for only: $1,650.00

VINTAGE CURTA TYPE II  CALCULATOR 536952 by Contina Ltd. Mauren Org. Box Manuals
VINTAGE CURTA TYPE II CALCULATOR 536952 by Contina Ltd. Mauren Org. Box Manuals
$975.00
Time Remaining: 28d 5h 57m
Buy It Now for only: $975.00

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 4d 20h 19m
Buy It Now for only: $19.95

Vintage Curta Mechanical Calculator Type II by Contina Ltd. Mauren
Vintage Curta Mechanical Calculator Type II by Contina Ltd. Mauren
$699.00
Time Remaining: 2d 1h 48m

♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
$999.00
Time Remaining: 25d 20h 2m
Buy It Now for only: $999.00

♕♕♕ 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: 12d 10h 45m
Buy It Now for only: $1,199.00

Curta Type I  Calculator Serial No. 53137
Curta Type I Calculator Serial No. 53137
$950.00
Time Remaining: 2d 11h 44m
Buy It Now for only: $1,235.00

1969 Late CURTA Calculator Type I #71474 - Excellent Condition w/Can
1969 Late CURTA Calculator Type I #71474 - Excellent Condition w/Can
$1,495.00
Time Remaining: 14d 17h 20m
Buy It Now for only: $1,495.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$18.95
Time Remaining: 23d 22h 12m
Buy It Now for only: $18.95

Late Curta Type1 Calculator #60437 with Case & 2 Manuals
Late Curta Type1 Calculator #60437 with Case & 2 Manuals
$999.00
Time Remaining: 3d 23h 30m

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: 28d 23h 23m
Buy It Now for only: $19.00

ULTRA RARE ! VERY EARLY Black CURTA Calculator Type 1 #6477 near MINT !
ULTRA RARE ! VERY EARLY Black CURTA Calculator Type 1 #6477 near MINT !
$1,990.00
Time Remaining: 20d 20h 41m
Buy It Now for only: $1,990.00

♕♕♕ RARE - LATE CURTA Calculator TYPE II #548763 - Near MINT STATE - 1968 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #548763 - Near MINT STATE - 1968 ♕♕♕
$1,399.00
Time Remaining: 4d 15h 24m
Buy It Now for only: $1,399.00

CURTA Type2 Calculator w/ Lots of Extras / NORES!!!
CURTA Type2 Calculator w/ Lots of Extras / NORES!!!
$535.00 (18 Bids)
Time Remaining: 4d 6h 42m

♕♕♕ 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: 8d 16h 14m
Buy It Now for only: $3,999.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 17d 18h 4m
Buy It Now for only: $19.95

EARLY CURTA TYPE 1 SCIENTIFIC CALCULATOR,#11848, SYSTEM CURT HERZSTARK
EARLY CURTA TYPE 1 SCIENTIFIC CALCULATOR,#11848, SYSTEM CURT HERZSTARK
$399.00 (2 Bids)
Time Remaining: 4d 10h 21m

♕♕♕ 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: 4d 15h 39m
Buy It Now for only: $1,199.00

♕♕♕ RARE - EARLY CURTA Calculator TYPE I #13476 - VERY GOOD STATE - 1951 ♕♕♕
♕♕♕ RARE - EARLY CURTA Calculator TYPE I #13476 - VERY GOOD STATE - 1951 ♕♕♕
$1,199.00
Time Remaining: 24d 20h 23m
Buy It Now for only: $1,199.00

CURTA CALCULATOR TYPE I SERIAL #46063 VERY GOOD CONDITION METAL CASE
CURTA CALCULATOR TYPE I SERIAL #46063 VERY GOOD CONDITION METAL CASE
$535.00 (3 Bids)
Time Remaining: 6d 3h 28m

CURTA-Computing examples for the Curta Calculator (booklet in english language)
CURTA-Computing examples for the Curta Calculator (booklet in english language)
$19.00
Time Remaining: 5d 19h 18m
Buy It Now for only: $19.00

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: 2h 10m
Buy It Now for only: $1,999.99

Curta Mechanical Calculator Type II #540925
Curta Mechanical Calculator Type II #540925
$1,750.00
Time Remaining: 3d 1h 9m

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