Other Calculators

Date and age calculators, unit converters and everyday tools. Fast, accurate conversions based on NIST definitions.

• Date Difference Calculator

  Days, weeks, months and years between two dates.

• Add / Subtract Days

  Find the date a number of days before or after.

• Temperature Converter

  Convert Celsius, Fahrenheit and Kelvin.

• Length Converter

  Convert between meters, kilometers, centimeters, millimeters and more.

• Weight Converter

  Convert between kilograms, grams, pounds, ounces and more.

• Area Converter

  Convert between square meters, square kilometers, square feet, acres and more.

• Volume Converter

  Convert between liters, milliliters, us gallons, us quarts and more.

• Speed Converter

  Convert between kilometers per hour, miles per hour, meters per second, knots and more.

• Fuel Cost Calculator

  Trip fuel needed and total cost.

• GPA Calculator

  Grade point average from grade points and credit hours.

• Time Duration Calculator

  Hours and minutes between two times of day.

• Currency Converter

  Convert between major currencies using reference rates or your own rate.