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# conversions&formulas

### commonly used conversions and formulas

Question | Answer |
---|---|

how to convert % to fraction | % over 100 Ex: 5% = 5/100 |

how to covert fraction to % | divide fraction and multiply times 100 Ex: 7/100 = 0.07 x 100 = 7% |

how do you write a ratio | with a colon Ex: 1:2 means 1 to two |

unit for gram | g or gm |

unit for liter | L |

unit for meter | m |

unit for kilogram | kg |

how many g in a kg | 1000 |

unit for milligram | mg |

how many mg in a g | 1000 |

how many mg in a kg | 1000x1000 = 1000000 |

unit for microgram | ug or mcg |

how many mcg in a mg | 1000 |

1000g = ___ kg | 1 |

1L = _____ mL? | 1000ml |

units of length | miles, inches, meters, kilometers |

units of weight | pounds, ounces, grams, mg, kg, mcg |

units of volume | liters, ml, cups, tsp, tablespoon, *fluid ounces |

mg is a unit of | weight |

ml is a unit of | volume |

mm is unit of | length |

feet is a unit of | length |

cup is a unit of | volume |

pound is a unit of | weight |

how many cups in a pint? | 2 |

how many pints in a quart? | 2 |

how many quarts in a gallon | 4 |

how many pints in a gallon | 8 because there are 4 quarts and each quart has 2 pints |

how many cups in a gallon? | 16 because there are 2 cups in each pint and 2 pints in each quart and 4 quarts in each gallon: 2x2x4=16 |

abbreviation for teaspoon | tsp |

abbreviation for tablespoon | Tbsp |

how many teaspoons in a tablespoon? | 3 |

how many mL in a tsp | 5 |

how many ml in a Tablespoon | 15 |

how many fluid ounces in a cup | 8 |

how many weight ounces in a pound | 16 |

how many mL in 1 oz | 30 |

cc stands for what | cubic centimeter |

cc is equal to how many ml? | 1cc = 1ml |

abbreviation for grain | gr |

1 grain = ____ mg | 65mg |

abbreviation for dram | dr |

1 dram = ___ ml | 4ml |

1 cup = _____ ml | 240 ml |

1/2 cup is how many oz? | 4oz |

130 mg is how many gr? | 2 gr |

w/w % concentration is written as | g/100g or any unit of weight as long as top and bottom are in SAME units |

v/v % concentration is written as | ml/100ml or any unit of volume as long as top and bottom are SAME units |

w/v % concentration is written as | g/100mL notice, units are not the same!! |

formula for creating a solution of a different volume and concentration | V1C1 = V2C2 where V1 & C1 are initial volume & concentration and V2 & C2 are desired volume and concentration |

How many ml of 50% dextrose needed to make 100ml of 10% dextrose solution? | V1* 50 = 100 * 10 V1= 1000/50 =20ml of 50% dextrose needed then q.s to 100 ml |

q.s means what? | quantity sufficient |

3cc = how many ml | 3 |

15 ml = how many tsp | 3 |

15ml = ___ cup | 0.06 c |

32 oz = ___ lb | 2 |

40 oz = ___ lb | 2.5 |

1 tsp = ___g | 5 g because 1 tsp = 5ml and 1 ml = 1 g |

1 lb = ___ g | 454g |

15 kg = ____ lb | 33 lb |

2 gr = _____ mg | 130 |

12 lb 4 oz = ___ lbs | 12.25 |

76 lb = ___ kg | 34.5 |

20 oz = ___ cc | 20 oz x 30ml/oz = 600ml = 600 cc |

5Tbsp = ___ gm | 5 Tbsp x 15ml/tsp = 75 ml = 75gm |

formula to convert temp in F to C | Tc = (5/9)*(Tf-32) |

formula to covernt temp in C to F | Tf = [(9/5)*Tc]+32 |

32 degrees F = ___ C | 0 degrees C Tc = (5/9)*(Tf-32)= (5/9) * (32-32) = 5/9 * 0 = 0 |

85 degrees F = ___ C | 29.4 degrees C Tc = (5/9)*(Tf-32) = (5/9) * (85-32) = (5/9)*53 = 29.4 |

102 degrees F = ___ C | 38.8 degrees C Tc = (5/9)*(Tf-32) = (5/9) * (102-32) = (5/9)*70 = 38.8 |

15 degrees C = ___ F | 59 degrees F Tf = [(9/5)*Tc]+32 = [(9/5)*15] +32 = 27-32 = 59 |

65 degrees C = ___ F | 149 degrees F Tf = [(9/5)*Tc]+32 = [(9/5)*65] + 32 = 117+32=149 |

34 degrees C = ____ F | 93.2 degrees F Tf = [(9/5)*Tc]+32 = [(9/5)*34]+32=61.2+32=93.2 |

5% solution contains how many g per ml? | 5g/100ml = 0.05g/1ml |

7% solution contains how many mg per ml? | 7g/100ml = 7000mg/100ml = 70mg/1ml |

12% solution contains how many mg per ml? | 12g/100ml = 12000mg/100ml = 120mg/ml |

What % solution is 8g in 100 ml? | 8% |

What % solution is 60mg in 100ml? | 60mg/100ml = 0.06g/100ml = 0.06% |

what is the $ solution of 150mg in 1 L? | 150mg/1L = 150mg/ 1000ml = 0.150g/1000ml =0.015g/100ml = 0.015 % |

what is the abbreviation for milliequivalent? | meq |

if 1 ml contains 2meq, how many meq will be in 5ml? | 10 because 5ml x 2meq/ml = 10meq |

If potassium is formulated as 2meq/ml, how many ml will you need to result in 20meq? | 10ml becuase 20meq divided by 2meq/ml = 10 |

To make a 250ml of 7% dextrose solution, how many ml of 50% dextrose do you need? | 7 * 250 = 50 X 1750/50=x x=35ml of 50% dextrose |

If you add 25ml of 50% dextrose to 1000ml, what is the resulting % concentration of the solution? | 50 * 25 = x * 1000 1250= x*1000 1.25 = x = 1.25% concentration of dextrose |