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 Type 1 #75042 RARE!!
CURTA Calculator Type 1 #75042 RARE!!
$925.00
Time Remaining: 6d 8h 46m
Buy It Now for only: $925.00

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 29d 22h 34m
Buy It Now for only: $19.95

CURTA Type II CALCULATOR with ORIGINAL CONTAINER  Superb MINT- Condition #554829
CURTA Type II CALCULATOR with ORIGINAL CONTAINER Superb MINT- Condition #554829
$794.00
Time Remaining: 27d 18h 32m
Buy It Now for only: $794.00

CURTA Calculator with case, Type I Serial No 73391
CURTA Calculator with case, Type I Serial No 73391
$600.00 (1 Bid)
Time Remaining: 19h 31m

CURTA TYPE II MECHANICAL CALCULATOR EXCELLENT OPERATIONAL & COSMETIC CONDITION
CURTA TYPE II MECHANICAL CALCULATOR EXCELLENT OPERATIONAL & COSMETIC CONDITION
$1,195.00
Time Remaining: 19h 38m
Buy It Now for only: $1,195.00

Curta Calculator Type II #506936 Serviced by Timewise
Curta Calculator Type II #506936 Serviced by Timewise
$1,099.00
Time Remaining: 9d 18h 17m
Buy It Now for only: $1,099.00

RARE EARLY 1955 ALL BLACK CURTA Type II Calculator, Low #505306 -w/can+2 manuals
RARE EARLY 1955 ALL BLACK CURTA Type II Calculator, Low #505306 -w/can+2 manuals
$1,695.00
Time Remaining: 22h 31m
Buy It Now for only: $1,695.00

Curta Calculator Type I Parts Nomenclature.  16
Curta Calculator Type I Parts Nomenclature. 16" x 24". New on Heavy Velum.
$12.00
Time Remaining: 3d 16h 31m

CURTA TYPE II MECHANICAL CALCULATOR EXCELLENT OPERATIONAL & LITTLE TO NO WEAR
CURTA TYPE II MECHANICAL CALCULATOR EXCELLENT OPERATIONAL & LITTLE TO NO WEAR
$1,000.00
Time Remaining: 7d 11h 10m
Buy It Now for only: $1,000.00

Curta calculator type II - super condition!!
Curta calculator type II - super condition!!
$1,550.00
Time Remaining: 8d 15h 31m
Buy It Now for only: $1,550.00

♕♕♕ RARE - CURTA Calculator TYPE I #31260 - GOOD Condition - 1955 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #31260 - GOOD Condition - 1955 ♕♕♕
$899.00
Time Remaining: 3d 11h 50m
Buy It Now for only: $899.00

♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD Condition - 1964 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD Condition - 1964 ♕♕♕
$1,099.00
Time Remaining: 3d 11h 58m
Buy It Now for only: $1,099.00

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
$1,800.00
Time Remaining: 22d 17h 53m
Buy It Now for only: $1,800.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 10d 9h 52m
Buy It Now for only: $19.95

CURTA CALCULATOR TYPE II SERIAL #534354
CURTA CALCULATOR TYPE II SERIAL #534354 "NOT BOXED"
$695.00
Time Remaining: 8d 16h 34m

1970 CURTA TYPE 1 #79263 CALCULATOR CONTINA ORIGINAL Box Case Instructions WORKS
1970 CURTA TYPE 1 #79263 CALCULATOR CONTINA ORIGINAL Box Case Instructions WORKS
$1,599.99
Time Remaining: 24d 11h 46m
Buy It Now for only: $1,599.99

VINTAGE 1970 CURTA CALCULATOR TYPE II WITH PLASTIC CASE
VINTAGE 1970 CURTA CALCULATOR TYPE II WITH PLASTIC CASE
$482.00 (5 Bids)
Time Remaining: 3d 21h 46m

♕♕♕ RARE - LATE CURTA Calculator TYPE I #64235 - NEAR MINT STATE - 1966 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE I #64235 - NEAR MINT STATE - 1966 ♕♕♕
$1,299.00
Time Remaining: 9d 9h 24m
Buy It Now for only: $1,299.00

immaculated CURTA CALCULATOR Type II - SN 548525 with original box and manuals
immaculated CURTA CALCULATOR Type II - SN 548525 with original box and manuals
$1,545.00
Time Remaining: 6d 7h 36m
Buy It Now for only: $1,545.00

VINTAGE 1970 CURTA CALCULATOR TYPE I WITH PLASTIC AND LEATHER CASES
VINTAGE 1970 CURTA CALCULATOR TYPE I WITH PLASTIC AND LEATHER CASES
$477.00 (5 Bids)
Time Remaining: 3d 21h 31m

♕♕♕ RARE - Early CURTA Calculator TYPE I #4081 - VERY GOOD STATE - 1948 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE I #4081 - VERY GOOD STATE - 1948 ♕♕♕
$1,799.00
Time Remaining: 1d 5h 56m
Buy It Now for only: $1,799.00

Very Rare Curta Calculator TYPE 1 #12446 Excellent Condition - 1950. With case.
Very Rare Curta Calculator TYPE 1 #12446 Excellent Condition - 1950. With case.
$1,500.00
Time Remaining: 3d 5h 38m

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$19.95
Time Remaining: 16d 13h 55m
Buy It Now for only: $19.95

Curt Herzstark CURTA mechanical calculator TYPE I #14527
Curt Herzstark CURTA mechanical calculator TYPE I #14527
$1,500.00
Time Remaining: 10d 14h 38m
Buy It Now for only: $1,500.00

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