Free Online Calculators

From BMI to loans, tips to age — instant calculations at your fingertips.

368 Calculators 16 Categories 100% Free

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Sweat Rate Calculator

#1

Estimates an athlete’s sweat loss per hour during exercise.

Health & Fitness 4 variants

Kinetic Energy Calculator (KE=½mv²)

Calculate kinetic energy from mass and velocity using KE=½mv². Perfect for physics and mechanics.

Science & Engineering 5 variants

Blood Alcohol Content (BAC) Calculator

Estimates Blood Alcohol Content (BAC) using the Widmark formula based on alcohol consumed, body weight, distribution ratio, and time since drinking began.

Health & Fitness 4 variants

Salary After Raise Calculator

Calculate the new salary after applying a percentage increase.

Financial Calculators 5 variants

Corrected Serum Sodium Calculator

Calculates corrected serum sodium level in patients with hyperglycemia using the standard correction factor.

Health & Fitness 4 variants

Body Roundness Index (BRI) Calculator

Estimates Body Roundness Index (BRI) using waist circumference and height measurements.

Health & Fitness 4 variants
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368 total
Slugging Percentage (SLG) Calculator Calculate a baseball player's Slugging Percentage using total bases divided by a...
Sports & Performance
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Macronutrient Grams Calculator Calculates the grams of a macronutrient based on total daily calories and macro...
Health & Fitness
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Standard Error Calculator Calculates the standard error of the mean (SEM) using sample standard deviation...
Statistics & Probability
EN
Ideal Gas Law Pressure Calculator Calculates gas pressure using the Ideal Gas Law (P = nRT / V).
Science & Engineering
EN
Mean Arterial Pressure (MAP) Calculator Estimates the average arterial pressure during a single cardiac cycle using syst...
Health & Fitness
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Annual Percentage Rate (APR) Calculator Calculates the Annual Percentage Rate (APR) based on total interest paid, loan a...
Financial Calculators
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Roof Pitch Calculator Calculates the roof slope (pitch) based on vertical rise and horizontal run.
Construction & Home
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Debt Service Coverage Ratio (DSCR) Calculator Calculate the Debt Service Coverage Ratio to evaluate a property's ability to co...
Financial Calculators
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Gas Mileage (MPG) Calculator Calculate your vehicle's fuel efficiency in miles per gallon.
Travel & Geography
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Electricity Cost Calculator Estimate the total electricity cost of running an appliance based on power usage...
Electrical & Electronics
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Payback Period Calculator Calculate how many years it takes to recover an initial investment based on cons...
Financial Calculators
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Free Cash Flow (FCF) Calculator Calculates the Free Cash Flow (FCF) by subtracting Capital Expenditures from Ope...
Financial Calculators
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