Metriverter
A slide calculator for metric/imperial conversion of length, weight, temperatures, area, pressure etc. Available with 24 scales.

Miniverter
Handy wallet-sized unit converter. Can be used as novel business card.

Concrete Volume Calculator
Calculates concrete volume required in cubic metres from length, width and depth.

Beer Profit Calculator
Shows profit on return with facility for adding VAT at any rate. Calibrated for draught and bottled beers.

Yarn Count Converter
Contains comparisons of many different units using a system devised by the Textile Institute of Manchester.

Land Agents Converter
Has scales selected to estate work. Includes 8 scaled edges.

Motorists Converter
Business card sized, has all units found in motoring. Also calculates fuel consumption.

Roof Pitch Indicator
Used in the building industry to measure the angle of a roof. A table on the reverse shows how to calculate length of rise, rafter, hip and valley. 94 x 102mm.

Date Finder Disc
Calculates future delivery or project completion dates from start date and project duration.

Company Car Tax Guide
From April 2002, company car taxes are calculated on the list price of the car and the official levels of emissions. This guide will give an indication of the tax payable for each year until the end of March 2006.

MEDICAL

Goniometer (Angle Gauge)
Used by orthopaedic surgeons to measure the range of bone joints.

Body Surface Area Slide Rule
Used to calculate the total body surface area when prescribing drugs.

ECG / Heart Rate Rule
For use by cardiologists to measure the ECG trace from electro-cardiogram machines.

Mini Visual Analogue Pain Scale
Used by Practitioners to assess degree of pain.

Ante-Natal Calculator
Used by obstetricians and practitioners to check the length of the pregnancy from the last period.

Body Mass Index (BMI) Calculators
The BMI is an internationally known calculation giving an indication of general health and weight.

Skin Lesion / Burn Gauge
Scale to measure skin lesions or burns. Of particular use to dermatologists.

Sunburn Protection Calculator
Gives protection time against UVA and UVB rays according to factor number.

Heart Risk Factor Calculator
Takes into account blood pressure, number of years smoking and other factors, to give an indication of heart attack risk.

Peak Expiratory Flow (PEF) Calculator
Used by the medical profession to give normal expected values for PEF. PEF is a measure of lung efficiency.

Drip Rate And Infusion Rate Calculator