 The metric system is only used in Bulgaria in the building and allied trades. The measurements are normally given in metres, centimetres and millimetres for measurments and in kilogram and tonnes for weights. These measures are inconveniet if you are used to to the Imperial unit system. For our clients from UK we have put together these conversion tables wich hopefully will help you to calculate the building measurments in the system you know better

## Length Conversion

 Imperial/USA unit Metric (SI) unit Metric (SI) unit Imperial/USA unit 1 Inch 2.54 centimeters 1 Centimeter 0.39 inches 1 Foot 30.48 centimeters 1 Meter 3.28 feet 1 Yard 0.91 meters 1 Meter 1.09 yards 1 Mile 1.61 kilometers 1 Kilometer 0.62 miles

## Weight (or mass) conversion

 Imperial/USA unit Metric (SI) unit Metric (SI) unit Imperial/USA unit 1 Ounce (weight) 28.35 grams 1 Gram 0.035 ounces 1 Pound 0.45 kilograms 1 Kilogram 2.21 pounds 1 UK ton (2240 pounds) 1.02 metric tons 1 Metric ton (1000 kg.) 0.98 UK tons 1 US ton (2000 pounds) 0.91 metric tons 1 Metric ton (1000 kg.) 1.10 US tons

## Temperature Conversion (°C / °F)

• The freezing point of water in Fahrenheit is 32 degrees, in Celsius it is 0 degrees.

• The boiling point of water in Fahrenheit is 212 degrees, in Celsius it is 100 degrees.

• Consequently the difference between freezing and boiling is 180 degrees Fahrenheit (212-32) or 100 degrees Celsius (100-0). This means that 180 degrees change in Fahrenheit is equal to 100 degree change in Celsius, or more simply 1.8 degrees Fahrenheit equals 1.0 degrees Celsius.

This gives rise to the following equations to convert between Celsius and Fahrenheit:

• °C = (°F – 32) ÷ 1.8

For example: (68°F-32) ÷ 1.8 = (36) ÷ 1.8 = 20°C

• °F = (°C x 1.8) + 32

For example: (20°C x 1.8) + 32 = (36) + 32  = 68°F

Some common examples for Celsius and Fahrenheit comparison:

• Freezing = 0 °C , 32°F

• Room temperature = 20 °C , 68°F

• Normal body temperature = 37 °C , 98.6°F

• A very hot day = 40 °C , 104°F

• Boiling point of water = 100 °C , 212°F

## Area Conversion

 Imperial/USA unit Metric (SI) unit Metric (SI) unit Imperial/USA unit 1 Acre 0.40 hectare 1 Hectare 2.47 acres 1 Square inch 6.45 square centimeters 1 Square centimeter 0.16 square inches 1 Square foot 0.09 square meters 1 Square meter 1 Square yard 0.84 square meters 1 Square meter 1.20 square yards 1 Square mile 2.60 square kilometers 1 Square kilometer 0.39 square miles 1 Cubic foot 0.028 cubic meters 1 Cubic meter 35.23 cubic feet 1 Cubic yard 0.76 cubic meters 1 Cubic meter 1.35 cubic yards

## Volume Conversion

 Imperial/USA unit Metric (SI) unit Metric (SI) unit Imperial/USA unit 1 Teaspoon (UK) 5.92 milliliters 1 Millilitre 0.17 teaspoons (UK) 1 Teaspoon (US) 4.93 milliliters 0.20 teaspoons (US) 1 Tablespoon (UK) 17.76 milliliters 10 Millilitre 0.56 tablespoons (UK) 1 Tablespoon (US) 14.79 milliliters 0.68 tablespoons (US) 1 Fluid ounce (UK) 28.41 milliliters 100 millilitre 3.52 fluid ounces (UK) 1 Fluid ounce (US) 29.57 milliliters 3.38 fluid ounces (US) 1 Pint (UK) 0.57 liters 1 Litre 1.76 pints (UK) 1 Pint (US) 0.47 liters 2.11 pints (US) 1 Quart (UK) 1.14 liters 0.88 quarts (UK) 1 Quart (US) 0.95 liters 1.06 quarts (US) 1 Gallon (UK) 4.55 liters 0.22 gallon (UK) 1 Gallon (US) 3.79 liters 0.26 gallons (US)

## Mileage Conversion

10 l/100km (litres per 100 kilometer = 28.24 mi/Imperial gal (miles per gallon)

or

40 mi/Imperial gal (miles per gallon) = 7.06 l/100km (litres per 100km)

## Building Materials

 Material kg per cubic metre Brick, common red 1922 kg per cubic metre Cement, Portland 1506 kg per cubic metre Concrete, Limestone with Portland 2371 kg per cubic metre Earth, loam, dry, excavated 1249 kg per cubic metre Earth, wet, excavated 1602 kg per cubic metre Glass, window 2579 kg per cubic metre Granite, solid 2691 kg per cubic metre Granite, broken 1650 kg per cubic metre Gravel, loose, dry 1522 kg per cubic metre Gravel, with sand, natural 1922 kg per cubic metre Gypsum, pulverized 1121 kg per cubic metre Lime, hydrated 481 kg per cubic metre Lime, wet or mortar 1540 kg per cubic metre Mortar, wet 2403 kg per cubic metre Sand, dry 1602 kg per cubic metre Sand, wetk 1922 kg per cubic metre Stone, crushed 1602 kg per cubic metre

You can use this metric calculator to convert every possible measure from one system into every other measure in another system. You will find there a “Length Conversion Calculator” (Millimeters, Centimeters, Meter and Kilometers into Inches, Feet, Yards and Miles), a “Weight Conversion Calculator” (Metric Tons, Kilograms, Pounds, Oz, Grams, Tons), a “Pressure Conversion Calculator” (Bar, Kg/cm, Psi), a “Volume Conversion Calculator” (Milliliters, Liters, Fluid Ounces, Pints, Cups, Quarts, Gallons) and a “Temperature Conversion Calculator” (Celsius, Fahrenheit ). Hope it will be helpful for your building project in Bulgaria.

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