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 Type 1 Calculator # 42169
Rare Curta Type 1 Calculator # 42169
$600.00 (2 Bids)
Time Remaining: 1d 2h 40m

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: 27d 9h 1m
Buy It Now for only: $19.00

Curta Mechanical Calculator Type 1  w case fr Parts
Curta Mechanical Calculator Type 1 w case fr Parts
$445.00
Time Remaining: 22d 5h 33m
Buy It Now for only: $445.00

♕♕♕ RARE - CURTA Calculator TYPE I #55218 - VERY GOOD STATE - 1963 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #55218 - VERY GOOD STATE - 1963 ♕♕♕
$999.00
Time Remaining: 2d 17h 45m
Buy It Now for only: $999.00

RARE - 1965 CURTA TYPE II Mechanical Calculator #532600 Contina Ltd Mauren wCase
RARE - 1965 CURTA TYPE II Mechanical Calculator #532600 Contina Ltd Mauren wCase
$712.00 (32 Bids)
Time Remaining: 1d 13h 25m

♕♕♕ 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: 2d 17h 57m
Buy It Now for only: $1,099.00

Curta Calculator Type I #16968 w/ Cases & Manuals
Curta Calculator Type I #16968 w/ Cases & Manuals
$1,199.00
Time Remaining: 16d 13h 13m
Buy It Now for only: $1,199.00

VINTAGE  Curta Calculator Type 1 with  LEATHER CASE #21350 Tested Works!
VINTAGE Curta Calculator Type 1 with LEATHER CASE #21350 Tested Works!
$500.00
Time Remaining: 1d 17h 30m

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 12d 5h
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: 8d 5h 16m
Buy It Now for only: $899.00

Two Curta Calculator Service Manuals
Two Curta Calculator Service Manuals
$29.95
Time Remaining: 4d 9h 54m

♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD STATE - 1964 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE II #528814 - VERY GOOD STATE - 1964 ♕♕♕
$999.00
Time Remaining: 19d 19h 27m
Buy It Now for only: $999.00

CURTA CALCULATOR TYPE I - rechenmaschine- lommeregner - kalkylator-cyfrifiannell
CURTA CALCULATOR TYPE I - rechenmaschine- lommeregner - kalkylator-cyfrifiannell
$1,000.00
Time Remaining: 16d 7h 3m
Buy It Now for only: $1,000.00

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: 19d 9h 2m
Buy It Now for only: $19.00

Curta Calculator Type 2 1958 Low Production,  Reds Levers are grouped together
Curta Calculator Type 2 1958 Low Production, Reds Levers are grouped together
$1,000.00
Time Remaining: 4d 2h 19m

Early CURTA Peppermill Calculator TYPE I #32345 Feb. 1956
Early CURTA Peppermill Calculator TYPE I #32345 Feb. 1956
$1,036.00
Time Remaining: 15d 8h 39m
Buy It Now for only: $1,036.00

♕♕♕ 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: 22d 3h 50m
Buy It Now for only: $999.00

Curta II mechanical calculator - serial # 516839, book and cases- slide rule
Curta II mechanical calculator - serial # 516839, book and cases- slide rule
$999.00
Time Remaining: 1d 15h 34m

RARE Hand Made Curta Calculator Leather Cover Canister - Free Shipping Worldwide
RARE Hand Made Curta Calculator Leather Cover Canister - Free Shipping Worldwide
$250.00
Time Remaining: 3d 8h 8m
Buy It Now for only: $250.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 25d 2h 45m
Buy It Now for only: $19.95

 Curta Calculator Type 1 For Sale Serial Number 35198
Curta Calculator Type 1 For Sale Serial Number 35198
$440.00 (9 Bids)
Time Remaining: 2d 12h 59m
Buy It Now for only: $950.00

Rare early 1949 Curta Type I Calculator with low sn 7007 w/ metal can + manuals
Rare early 1949 Curta Type I Calculator with low sn 7007 w/ metal can + manuals
$1,495.00
Time Remaining: 6d 15h 25m
Buy It Now for only: $1,495.00

♕♕♕ 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: 28d 21m
Buy It Now for only: $1,199.00

CURTA TYPE II CALCULATOR MECHANICAL MANUFACTURED 1958 WITH CASE S# 511152
CURTA TYPE II CALCULATOR MECHANICAL MANUFACTURED 1958 WITH CASE S# 511152
$799.99 (1 Bid)
Time Remaining: 2d 15h 56m

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