The following sites contain links to online reference tools: almanacs, encyclopedias, fact books, dictionaries, thesauri, quotes, directories, statistics, atlases, grammar guides, calendars, weights & measures, more.
See also Reference databases.
- Acronym Finder - 252,000+ acronyms, abbreviations, and their definitions.
Calculators & Converters
- Approximate Conversions from Metric Measures - How to convert Metric measurements into other units.
- Approximate Conversions to Metric Measures - How to convert units of measurement into Metric units.
- CalculatorPLUS.com - Free business & financial calculators includiing mortgage loan, credit card, insurance, interest rate, savings, refinance, retirement, and auto finance.
- ConvertIt.com - Measurements, exchange rates, time zones, calculators, more.
- Currency Converter - Multilingual Foreign Exchange calculator.
- DollarTimes.com - Financial calculators covering home & car loans, investment & savings, and personal finance.
- Interactive Units Converter - Convert weight, temperature, speed, etc.
- Infobel - Links to online telephone directories.
- Population Counts - Current U.S. and world population estimates from the U.S. Census Bureau.
- ZIP Codes - ZIP Code lookup from the U.S. Postal Service.