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 1 Mechanical Calculator
Curta Type 1 Mechanical Calculator
$599.99 (1 Bid)
Time Remaining: 1d 10h 59m

RARE ! Black CURTA Calculator Type 1 #52465 near MINT !
RARE ! Black CURTA Calculator Type 1 #52465 near MINT !
$990.00
Time Remaining: 23d 4h 25m
Buy It Now for only: $990.00

♕♕♕ RARE - CURTA Calculator TYPE I #47691 - VERY GOOD STATE - 1961 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #47691 - VERY GOOD STATE - 1961 ♕♕♕
$999.00
Time Remaining: 28d 6h 3m
Buy It Now for only: $999.00

♕♕♕ RARE - CURTA Calculator TYPE I #46011 - VERY GOOD STATE - 1961 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #46011 - VERY GOOD STATE - 1961 ♕♕♕
$1,199.00
Time Remaining: 28d 5h 56m
Buy It Now for only: $1,199.00

RARE :  EARLY Black CURTA Calculator Type 1 - w/case - MINT !
RARE : EARLY Black CURTA Calculator Type 1 - w/case - MINT !
$999.00
Time Remaining: 2d 10h 17m

Rare 1959 CURTA Type II 2 calculator & metal case (#513034) - tested & working
Rare 1959 CURTA Type II 2 calculator & metal case (#513034) - tested & working
$1,350.00
Time Remaining: 25d 11h 6m
Buy It Now for only: $1,350.00

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 10d 11h 37m
Buy It Now for only: $19.95

♕♕♕ RARE - LATE CURTA Calculator TYPE II #554135 - VERY GOOD STATE - 1969 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #554135 - VERY GOOD STATE - 1969 ♕♕♕
$1,099.00
Time Remaining: 4d 8h 40m
Buy It Now for only: $1,099.00

curta calculator vintage antique type II contina mauren scientific insrtrument
curta calculator vintage antique type II contina mauren scientific insrtrument
$490.00 (1 Bid)
Time Remaining: 2d 20h 3m

♕♕♕ RARE - Early CURTA Calculator TYPE II #500517 - MINT STATE - 1953 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #500517 - MINT STATE - 1953 ♕♕♕
$1,999.00
Time Remaining: 4d 8h 3m
Buy It Now for only: $1,999.00

♕♕♕ 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: 26d 12h 18m
Buy It Now for only: $1,299.00

RARE CURTA TYPE 1 CALCULATOR in FACTORY NEW COND, NEVER USED w/ case and manuals
RARE CURTA TYPE 1 CALCULATOR in FACTORY NEW COND, NEVER USED w/ case and manuals
$1,599.00
Time Remaining: 24d 16h 16m
Buy It Now for only: $1,599.00

Vintage Curta Type ll Calculator Serial #528575
Vintage Curta Type ll Calculator Serial #528575
$900.00
Time Remaining: 3d 16h 17m

♕♕♕ RARE - CURTA Calculator TYPE II #527346 - VERY GOOD STATE - 1964 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #527346 - VERY GOOD STATE - 1964 ♕♕♕
$1,199.00
Time Remaining: 26d 12h 15m
Buy It Now for only: $1,199.00

Curta calculator Type I, not perfect
Curta calculator Type I, not perfect
$900.00
Time Remaining: 22d 2h 7m
Buy It Now for only: $900.00

♕♕♕ RARE - CURTA Calculator TYPE II #521228 - VERY GOOD STATE - 1962 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #521228 - VERY GOOD STATE - 1962 ♕♕♕
$1,099.00
Time Remaining: 26d 12h 17m
Buy It Now for only: $1,099.00

RARE FIND -- LATE CURTA Calculator TYPE II #550063. NEAR MINT  with BOX
RARE FIND -- LATE CURTA Calculator TYPE II #550063. NEAR MINT with BOX
$1,250.00
Time Remaining: 4d 7h 9m
Buy It Now for only: $1,750.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #502557 - VERY GOOD STATE - 1953 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #502557 - VERY GOOD STATE - 1953 ♕♕♕
$1,399.00
Time Remaining: 26d 12h 7m
Buy It Now for only: $1,399.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #509721 - VERY GOOD STATE - 1956 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #509721 - VERY GOOD STATE - 1956 ♕♕♕
$1,399.00
Time Remaining: 26d 10h 3m
Buy It Now for only: $1,399.00

!! ON SALE !! VERY EARLY CURTA Calculator Type 2 #500236 in near MINT Condition!
!! ON SALE !! VERY EARLY CURTA Calculator Type 2 #500236 in near MINT Condition!
$3,400.00
Time Remaining: 18d 10h 59m
Buy It Now for only: $3,400.00

RARE CURTA TYPE 1 CALCULATOR with leather case
RARE CURTA TYPE 1 CALCULATOR with leather case
$789.99
Time Remaining: 4d 10h 30m

♕♕♕ RARE - LATE CURTA Calculator TYPE II #549092 - VERY GOOD STATE - 1968 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #549092 - VERY GOOD STATE - 1968 ♕♕♕
$1,099.00
Time Remaining: 26d 10h 6m
Buy It Now for only: $1,099.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 23d 9h 22m
Buy It Now for only: $19.95

1969 Curta Type I Calculating Machine Calculator No. 73903 w/ Box
1969 Curta Type I Calculating Machine Calculator No. 73903 w/ Box
$1,499.99
Time Remaining: 13d 21h 4m
Buy It Now for only: $1,499.99

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