Free Online Calculators

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

327 Calculators 16 Categories 100% Free

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Price Elasticity of Demand (PED) Calculator

#1

Calculates the Price Elasticity of Demand using the standard elasticity formula.

Business & Retail 4 variants

Medication Dosage Calculator

Calculates the total medication dose based on body weight and prescribed dosage per kilogram.

Health & Fitness 4 variants

Round Swimming Pool Volume Calculator

Calculates the water volume of a round (cylindrical) swimming pool using diameter and water depth.

Construction & Home 4 variants

Calorie Deficit Calculator

Calculate your daily calorie deficit needed for weight loss.

Health & Fitness 5 variants

Ejection Fraction (EF) Calculator

Calculates the heart's Ejection Fraction (EF), which measures the percentage of blood pumped out of the left ventricle with each contraction.

Health & Fitness 4 variants

Body Surface Area (BSA)–Based Dosage Calculator

Estimates total medication dose using the Mosteller BSA formula.

Health & Fitness 4 variants
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Calculators

327 total
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
EN
Debt Service Coverage Ratio (DSCR) Calculator Calculate the Debt Service Coverage Ratio to evaluate a property's ability to co...
Financial Calculators
EN
Gas Mileage (MPG) Calculator Calculate your vehicle's fuel efficiency in miles per gallon.
Travel & Geography
EN
Electricity Cost Calculator Estimate the total electricity cost of running an appliance based on power usage...
Electrical & Electronics
EN
Payback Period Calculator Calculate how many years it takes to recover an initial investment based on cons...
Financial Calculators
EN
Free Cash Flow (FCF) Calculator Calculates the Free Cash Flow (FCF) by subtracting Capital Expenditures from Ope...
Financial Calculators
EN
Gross Rent Multiplier (GRM) Calculator Calculate the Gross Rent Multiplier to evaluate the value of an income-producing...
Financial Calculators
EN
Present Value (PV) Calculator Calculate the present value of a future amount based on a fixed annual interest...
Financial Calculators
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Return on Ad Spend (ROAS) Calculator Calculates the Return on Ad Spend (ROAS) to measure the effectiveness of adverti...
Business & Retail
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Blood Alcohol Content (BAC) Calculator Estimates Blood Alcohol Content (BAC) using the Widmark formula based on alcohol...
Health & Fitness
EN
Body Roundness Index (BRI) Calculator Estimates Body Roundness Index (BRI) using waist circumference and height measur...
Health & Fitness
EN