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 Type I Type 1 Vintage Calculator SN 76800
Curta Type I Type 1 Vintage Calculator SN 76800
$1,139.00
Time Remaining: 28d 13h 7m
Buy It Now for only: $1,139.00

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 11d 17h 9m
Buy It Now for only: $19.95

Curta type 2 calculator made in lichtenstein Germany
Curta type 2 calculator made in lichtenstein Germany
$906.39 (24 Bids)
Time Remaining: 14h 19m

Curta Type II Calculator
Curta Type II Calculator
$599.99 (1 Bid)
Time Remaining: 3d 18h 7m

Curta Calculator Type 1 #42959
Curta Calculator Type 1 #42959
$900.00
Time Remaining: 1d 21h 48m
Buy It Now for only: $900.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$19.95
Time Remaining: 14h 31m
Buy It Now for only: $19.95

CURTA TYPE II CALCULATOR #555886 with case, manual, and instruction sheet
CURTA TYPE II CALCULATOR #555886 with case, manual, and instruction sheet
$750.00
Time Remaining: 4d 17h 7m

♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕
♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕
$199.00
Time Remaining: 20d 6h 26m
Buy It Now for only: $199.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #506874 - GOOD STATE - 1955 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #506874 - GOOD STATE - 1955 ♕♕♕
$1,299.00
Time Remaining: 23d 18h 33m
Buy It Now for only: $1,299.00

RARE EARLY 1953 ALL BLACK CURTA Type II Calculator, Very Low #500512 -w/ can
RARE EARLY 1953 ALL BLACK CURTA Type II Calculator, Very Low #500512 -w/ can
$1,895.00
Time Remaining: 3d 39m
Buy It Now for only: $1,895.00

RARE CURTA Calculator TYPE II № 515184 Lichtenstein By Contina Ltd Mauren 1960
RARE CURTA Calculator TYPE II № 515184 Lichtenstein By Contina Ltd Mauren 1960
$1,288.00
Time Remaining: 1d 14h 24m
Buy It Now for only: $1,288.00

♕♕♕ RARE - LATE CURTA Calculator TYPE I #75490 - VERY GOOD STATE - 1969 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE I #75490 - VERY GOOD STATE - 1969 ♕♕♕
$1,199.00
Time Remaining: 23d 9h 55m
Buy It Now for only: $1,199.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #505009 - VERY GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #505009 - VERY GOOD STATE - 1954 ♕♕♕
$1,299.00
Time Remaining: 13d 11h 45m
Buy It Now for only: $1,299.00

mint CURTA CALCULATOR Type II - SN 548525+ box + manuals - perfect Xmas Gift
mint CURTA CALCULATOR Type II - SN 548525+ box + manuals - perfect Xmas Gift
$1,485.00
Time Remaining: 23d 11h 23m
Buy It Now for only: $1,485.00

RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
$59.99
Time Remaining: 28d 9h 50m
Buy It Now for only: $59.99

♕♕♕ RARE - Early BOXED CURTA Calculator TYPE I #7416 -VERY GOOD STATE - 1949 ♕♕♕
♕♕♕ RARE - Early BOXED CURTA Calculator TYPE I #7416 -VERY GOOD STATE - 1949 ♕♕♕
$1,599.00
Time Remaining: 23d 10h 10m
Buy It Now for only: $1,599.00

RARE - CURTA Calculator TYPE I or II Plastic CLEARING LEVER
RARE - CURTA Calculator TYPE I or II Plastic CLEARING LEVER
$59.99
Time Remaining: 1d 6h 53m
Buy It Now for only: $59.99

♕♕♕ RARE - BOXED CURTA Calculator TYPE II #554901 - VERY GOOD Cond - 1969 ♕♕♕
♕♕♕ RARE - BOXED CURTA Calculator TYPE II #554901 - VERY GOOD Cond - 1969 ♕♕♕
$1,399.00
Time Remaining: 13d 12h 12m
Buy It Now for only: $1,399.00

RARE - CURTA Calculator TYPE II TRIGGER PIN auslösebolzen
RARE - CURTA Calculator TYPE II TRIGGER PIN auslösebolzen
$49.99
Time Remaining: 1d 7h 3m
Buy It Now for only: $49.99

♕♕♕ 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: 12d 10h 58m
Buy It Now for only: $399.00

RARE - CURTA Calculator TYPE II Locking Pin Sperrbolzen
RARE - CURTA Calculator TYPE II Locking Pin Sperrbolzen
$49.99
Time Remaining: 1d 7h 26m
Buy It Now for only: $49.99

CURTA CALCULATOR TYPE 1 NO 59957 CONTINA AG MAUREN 1965 LIECHTENSTEIN COMPUTER
CURTA CALCULATOR TYPE 1 NO 59957 CONTINA AG MAUREN 1965 LIECHTENSTEIN COMPUTER
$1,690.00
Time Remaining: 11d 3h 59m
Buy It Now for only: $1,690.00

RARE - Sticker CURTA Calculator TYPE I or TYPE II CANISTER - Case - Autocollant
RARE - Sticker CURTA Calculator TYPE I or TYPE II CANISTER - Case - Autocollant
$24.99
Time Remaining: 23d 22h 53m
Buy It Now for only: $24.99

RARE - CURTA Calculator TYPE I TRIGGER PIN auslösebolzen
RARE - CURTA Calculator TYPE I TRIGGER PIN auslösebolzen
$49.99
Time Remaining: 1d 7h 2m
Buy It Now for only: $49.99

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