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 1 69244 Mid 60's.
Rare, Curta Calculator Type 1 69244 Mid 60's.
$900.00
Time Remaining: 1d 12h 39m
Buy It Now for only: $1,300.00

Curta Calculator - model 1 - #48501
Curta Calculator - model 1 - #48501
$725.00
Time Remaining: 3d 9h 56m
Buy It Now for only: $725.00

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: 28d 7h 53m
Buy It Now for only: $19.00

♕♕♕ RARE - CURTA Calculator TYPE I #55218 - VERY GOOD STATE - 1963 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #55218 - VERY GOOD STATE - 1963 ♕♕♕
$999.00
Time Remaining: 20d 19h 40m
Buy It Now for only: $999.00

Curta Mechanical Calculator Type 1  w case fr Parts
Curta Mechanical Calculator Type 1 w case fr Parts
$375.00
Time Remaining: 2d 6h 23m

♕♕♕ RARE - CURTA Calculator TYPE II #539047 - VERY GOOD STATE - 1966 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #539047 - VERY GOOD STATE - 1966 ♕♕♕
$1,099.00
Time Remaining: 20d 19h 52m
Buy It Now for only: $1,099.00

Early CURTA Peppermill Calculator TYPE I #32345 Feb. 1956
Early CURTA Peppermill Calculator TYPE I #32345 Feb. 1956
$1,295.00
Time Remaining: 3d 10h 34m
Buy It Now for only: $1,295.00

♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD STATE - 1964 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD STATE - 1964 ♕♕♕
$999.00
Time Remaining: 7d 21h 22m
Buy It Now for only: $999.00

 Curta  Type II Calculator  S/N 552110  w  Leather & Plastic Cases
Curta Type II Calculator S/N 552110 w Leather & Plastic Cases
$510.00 (17 Bids)
Time Remaining: 3d 13h 31m

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 6h 56m
Buy It Now for only: $19.95

♕♕♕ RARE - Early CURTA Calculator TYPE II #513740 - GOOD STATE - 1960 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #513740 - GOOD STATE - 1960 ♕♕♕
$899.00
Time Remaining: 26d 7h 12m
Buy It Now for only: $899.00

Vintage Rare Curta Type Two Mechanical Calculator No. 513925 W/ Case
Vintage Rare Curta Type Two Mechanical Calculator No. 513925 W/ Case
$899.00
Time Remaining: 5d 9h 53m

♕♕♕ 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: 10d 5h 45m
Buy It Now for only: $999.00

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
$250.00
Time Remaining: 1d 7h 41m
Buy It Now for only: $250.00

♕♕♕ 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: 4d 2h 50m
Buy It Now for only: $2,599.00

VINTAGE  Curta Calculator Type 1 with  LEATHER CASE #21350
VINTAGE Curta Calculator Type 1 with LEATHER CASE #21350
$695.00
Time Remaining: 6d 14h 45m

♕♕♕ RARE - Early CURTA Calculator TYPE II #505970 - VERY GOOD STATE - 1956 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #505970 - VERY GOOD STATE - 1956 ♕♕♕
$1,399.00
Time Remaining: 20d 19h 59m
Buy It Now for only: $1,399.00

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: 7d 10h 57m
Buy It Now for only: $19.00

VINTAGE  Curta Calculator Type 1 with Original case #42066
VINTAGE Curta Calculator Type 1 with Original case #42066
$325.00
Time Remaining: 6d 17h 30m
Buy It Now for only: $625.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 13d 4h 41m
Buy It Now for only: $19.95

♕♕♕ RARE - CURTA Calculator TYPE I #63839 - VERY GOOD STATE - 1966 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #63839 - VERY GOOD STATE - 1966 ♕♕♕
$1,199.00
Time Remaining: 16d 2h 17m
Buy It Now for only: $1,199.00

♕♕♕ RARE - LATE CURTA Calculator TYPE I #66765 - VERY GOOD STATE - 1967 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE I #66765 - VERY GOOD STATE - 1967 ♕♕♕
$1,199.00
Time Remaining: 5d 6h 18m
Buy It Now for only: $1,199.00

curta calculator type i
curta calculator type i
$1,000.00
Time Remaining: 14h 21m

♕♕♕ RARE - CURTA Calculator TYPE II #527953 - VERY GOOD STATE - 1964 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #527953 - VERY GOOD STATE - 1964 ♕♕♕
$999.00
Time Remaining: 20d 7h 16m
Buy It Now for only: $999.00

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