13 free calculators
Math & Science Calculators
Free online math calculators for percentages, age, unit conversion, temperature, GPA, discounts, date differences, speed, area, word counting, grades, fuel costs, and electricity costs. Fast and accurate.
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Percentage Calculator
Find any percentage instantly
Word Counter
Words, characters & reading time
Grade Calculator
Weighted average & letter grade
Fuel Cost Calculator
Trip fuel cost estimator
Electricity Cost
Appliance running costs
Age Calculator
Exact age in years & days
Unit Converter
Length, weight, volume & speed
Temperature Converter
Celsius, Fahrenheit & Kelvin
GPA Calculator
Grade point average
Discount Calculator
Sale price & money saved
Date Difference
Days between any two dates
Speed Calculator
Speed, distance & time
Area Calculator
Area of any shape