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 - CURTA Calculator TYPE I #55218 - VERY GOOD STATE - 1963 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #55218 - VERY GOOD STATE - 1963 ♕♕♕
$999.00
Time Remaining: 14d 19h 54m
Buy It Now for only: $999.00

♕♕♕ RARE - EARLY CURTA Calculator TYPE I #18638 - VERY GOOD STATE - 1952 ♕♕♕
♕♕♕ RARE - EARLY CURTA Calculator TYPE I #18638 - VERY GOOD STATE - 1952 ♕♕♕
$999.00
Time Remaining: 4d 5h 58m
Buy It Now for only: $999.00

CURTA Calculator TYPE II #515348 - with Canister
CURTA Calculator TYPE II #515348 - with Canister
$999.00
Time Remaining: 28d 7h 33m
Buy It Now for only: $999.00

CURTA Calculator TYPE I #70337 - with Canister, Original Box and Manual
CURTA Calculator TYPE I #70337 - with Canister, Original Box and Manual
$999.00
Time Remaining: 28d 7h 6m
Buy It Now for only: $999.00

Rare Curta Calculator Type II #552510 1969 *Excellent Condition*
Rare Curta Calculator Type II #552510 1969 *Excellent Condition*
$676.66 (16 Bids)
Time Remaining: 3d 12h 4m

♕♕♕ 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: 20d 6h 34m
Buy It Now for only: $999.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #508145 - VERY GOOD STATE - 1956 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #508145 - VERY GOOD STATE - 1956 ♕♕♕
$1,399.00
Time Remaining: 4d 6h 5m
Buy It Now for only: $1,399.00

♕♕♕ RARE - Early CURTA Calculator TYPE I #6465 - VERY GOOD STATE - 1949 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE I #6465 - VERY GOOD STATE - 1949 ♕♕♕
$1,999.00
Time Remaining: 23d 4h 29m
Buy It Now for only: $1,999.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #514414 - MINT STATE - 1960 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #514414 - MINT STATE - 1960 ♕♕♕
$2,599.00
Time Remaining: 28d 3h 4m
Buy It Now for only: $2,599.00

♕♕♕ RARE - CURTA Calculator TYPE I #63726 - VERY GOOD STATE - 1966 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #63726 - VERY GOOD STATE - 1966 ♕♕♕
$1,399.00
Time Remaining: 28d 5h 36m
Buy It Now for only: $1,399.00

1964 Curta Calculator Type 2
1964 Curta Calculator Type 2
$1,500.00
Time Remaining: 26d 9h 53m
Buy It Now for only: $1,500.00

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 26d 17h 37m
Buy It Now for only: $19.95

VERY RARE Curta Calculator Type II Hand Made Black Thick Leather Cover Canister
VERY RARE Curta Calculator Type II Hand Made Black Thick Leather Cover Canister
$0.99
Time Remaining: 7d 12h 39m

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: 19d 13h 1m
Buy It Now for only: $1,800.00

♕♕♕ 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: 4d 7h 33m
Buy It Now for only: $399.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 7d 4h 54m
Buy It Now for only: $19.95

Curta Type II Calculator No 556217 with Canister & Computing Manual&Box
Curta Type II Calculator No 556217 with Canister & Computing Manual&Box
$483.69 (17 Bids)
Time Remaining: 8d 9h 42m

CURTA TYPE 1 SERIAL #40138 RARE VINTAGE CALCULATOR NEAR MIB WORKS PERFECTLY!
CURTA TYPE 1 SERIAL #40138 RARE VINTAGE CALCULATOR NEAR MIB WORKS PERFECTLY!
$1,220.00
Time Remaining: 2d 12h 23m
Buy It Now for only: $1,220.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$18.95
Time Remaining: 13d 9h 2m
Buy It Now for only: $18.95

Curta Calculator Type 2 1958 Low Production,  Reds Levers are grouped together
Curta Calculator Type 2 1958 Low Production, Reds Levers are grouped together
$999.00
Time Remaining: 25d 10h 32m
Buy It Now for only: $999.00

Manual for Curta Calculator, good cond, (P635)
Manual for Curta Calculator, good cond, (P635)
$4.99
Time Remaining: 15d 7h 33m
Buy It Now for only: $4.99

Curta Calculator Instruction Manual
Curta Calculator Instruction Manual
$6.00
Time Remaining: 13d 13h 57m
Buy It Now for only: $6.00

Curta Mechanical Calculator Type II # 557613 Minty ...... W/Case,I.B.
Curta Mechanical Calculator Type II # 557613 Minty ...... W/Case,I.B.
$2,255.00
Time Remaining: 21h 43m
Buy It Now for only: $2,255.00

Curta Mechanical Calculator Type II #537604 ........ Minty W/Case
Curta Mechanical Calculator Type II #537604 ........ Minty W/Case
$2,100.00
Time Remaining: 7d 1h 9m
Buy It Now for only: $2,100.00

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