A temperature conversion chart that can be set to go from Celsius to Fahrenheit or Fahrenheit to Celsius can be found at Metric-Conversions.org. This chart can be printed, set to show either decimals or fractions, and can represent up eight significant figures.
To convert from Fahrenheit to Celsius without a chart, simply subtract 32 from the Fahrenheit temperature, divide by 9, and then multiply by 5. Thus, 95 degrees Fahrenheit would be 35 degrees Celsius: (93-32)=63, 63/9=7 and 7*5=35.
To move a temperature from Celsius to Fahrenheit reverse this process (multiply by 9, divide by 5 and add 32). For example, 20 degrees Celsius would be 68 degrees Fahrenheit: 20*9=180, 180/5=36 and 36+32=68.