Math Calculators

Instantly calculate a rectangle's area and perimeter for free – get the exact size you need for projects, planning, and budgeting, free, no sign-up

Instantly calculate how many liters of concentrate and water you need for any total volume and target percent—free and immediate, free, no sign-up

Instantly calculate the absolute and percent change between two numbers – get precise results in seconds, free, no sign-up

Calculate the exact area of a circle instantly for free by entering any non‑negative radius. Get your result instantly, free, no sign-up

Calculate your daily water needs in ounces and liters instantly and free, so you can stay hydrated without guesswork – free, no sign-up

Calculate any power instantly – enter a positive base and any exponent to get the exact result, free and instant, free, no sign-up

Instantly calculate the sum, difference, product or quotient of two fractions and see the exact numerator, denominator and decimal – free, no sign-up

Calculate the exact common‑denominator fraction and its decimal for any two fractions instantly – free, no sign-up

Calculate your average points per dart instantly for free—just enter darts thrown and total score and get the result now, free, no sign-up.

Calculate your LCD screen’s diagonal and area instantly for free, no sign-up.

Calculate the percentage difference, change, and ratio between two numbers instantly – free, no sign-up

Calculate percentages, parts, and changes instantly for free. Get X% of Y, see what % a number is of another, and compute change – free, no sign-up

Instantly calculate percentages, parts, and changes for free, no sign-up

Calculate the exact percentage of one number relative to another instantly and for free. free, no sign-up

Find what a percentage of any number is instantly. Free, no sign-up — simple, fast and always accurate.

Find the percentage increase or decrease between two numbers instantly. Free, no sign-up — just enter the old and new values.

Instantly calculate the percentage difference between two numbers for free, free, no sign-up

Calculate the percent, part, or whole instantly for free with our Percentage Formula Calculator – instant, accurate results, free, no sign-up

Instantly calculate a sphere's surface area and get the exact result for free – free, no sign-up

Calculate the square root of any number instantly, free and without registration. free, no sign-up

Instantly calculate your daily water intake in ml based on steps per day – free and no sign‑up. Keep hydrated with the Step Up Sip Calculator, free, no sign-up

Calculate your win percentage instantly for free and see your success rate in seconds. free, no sign-up