Math & Conversions Calculators
Percentage calculators, unit conversions, and everyday math tools.
Percentage Calculator
Calculate percentages for all common scenarios. Find what percent one number is of another, calculate percentage increases and decreases (like salary raises or price markups), determine the original amount when you know the percentage, and solve percentage word problems. Works for grades, finances, statistics, tips, and everyday math.
FeaturedDiscount Calculator
Calculate how much you save with any discount percentage. Enter the original price and discount to instantly see your savings and the final price you pay. Perfect for comparing deals, understanding "percent off" sales, and calculating actual costs during shopping and online purchases.
Sales Tax Calculator
Calculate sales tax quickly for any purchase. Enter the pre-tax price and your local tax rate to see the total cost with tax included. Also works in reverse—enter your total payment to extract the pre-tax price and tax amount. Essential for budgeting and understanding your actual costs at checkout.
Fahrenheit to Celsius Converter
Convert temperatures between Fahrenheit and Celsius instantly. Essential for understanding weather forecasts, cooking international recipes, scientific measurements, and travel. Works both directions—enter a temperature in either scale and instantly see the conversion.
Miles to Kilometers Converter
Convert miles to kilometers and vice versa instantly. Essential for international travel, understanding road distances, comparing running/marathon distances, and working with foreign maps. Works both directions—enter a distance in miles or kilometers and instantly see the conversion.