1. Systems Of measurement

2. The united states customary units……………………………………… page 1

3. The united states customary units are a system of measurements commonly used in the United States. Many U.S. units are virtually identical to their imperial counterparts, but the U.S. customary system developed from English units used in the Britannic Empire before the system of imperial units was standardized in 1824. Several numerical differences from the imperial system are present. The vast majority of U.S. customary units have been defined in terms of the meter and the kilogram since the Mendenhall Order of 1893 (and, in practice, for many years before that date). These definitions were refined by the international yard and pound agreement of 1959. According to the CIA Fact book, the United States is one of three countries (the others being Liberia and Burma/Myanmar) that has not adopted the International System of Units (SI) metric system as their official system of weights and measures. The U.S. does not primarily use SI units in its commercial activities, although they are standard in science, medicine, and government (including the U.S. Armed Forces), as well as many sectors of industry. The united states customary units

4. MetricImperial 1 square centimetre = 0.1550 square inches 1 square metre = 1.1960 square yards 1 hectare=2.4711 acres 1 square kilometre = 0.3861 square miles ImperialMetric 1 square inch = 6.4516 square centimetres 1 square foot =0.0929 square metres 1 square yard = 0.8361 square metres 1 acre =4046.9 square metres 1 square mile =2.59 square kilometres Conversion tables

5. Farthing = copper coin value 1/4 penny Ha'penny = copper coin value 1/2 penny Penny = copper coin, one of the basic units = 1d Thrupenny bit = brass coloured twelve sided coin value three pennies = 3d (thrupence) Sixpence (tanner) = silver coin value six pennies = 6d Shilling (bob) = silver coin second basic unit, value 12 pennies =1/- Florin (two bob) = silver coin value two shillings = 2/- Half-crown (half a dollar) = silver coin value two shillings and six pence = 2/6d Ten shillings (ten bob) = banknote value 10 shillings = 10/- Pound (quid) = third basic unit, banknote value 20 shillings or 240 pennies = £1 Five pounds (fiver) = banknote value five pounds = £5 Units of currency

6. 1 inch (in) = 0.0254 m 1 feet (ft) = 0.3048 m 1 yard (yd) = 0.9144 1 statute mile (st.m) = 1609.3 = 1.6093 km 1 nautical mile (nm) = 1853m = 1.853 km 1 meter (m) = 3.281 ft = 39.37 in 1 kilometer (km) = 0.6214 = 0.5396 nm st.m Surface measurements 1 square foot (sq.ft) = 0.0929 m ^ 2 1 square meter (m2) = 10.76 sq.ft Weight measurements 1 pound (lb) = 0.4536 kg 1 kilogram (kg) = 2.204 lb Capacity measures 1 U.S. gallon (U.S. gallon) = 3.785 L. 1 imperial gallon (imp gallon) = 4.546 L. 1 liter (L) = 0.2642 U.S. gallon = 0.22 imp gallon Power Measurements 1 horsepower (hp) = 0.7355 kw 1 Horse Power (cp) = 0.7457 kw 1 kilowatt (kw) = 1.3596 hp = 1.341 hp

7. SYSTEMS OF MEASUREMENTS METRIC SYSTEMyardfeet CONVERSION TABLES inch US CUSTOMARY UNITS ShillingPoundFarthing CONVERSION TABLES