Free Online Calculators

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

505 Calculators 18 Categories 100% Free

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50 Calculators

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6 Calculators

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15 Calculators

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100 Calculators

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121 Calculators

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34 Calculators

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56 Calculators

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PayPal Fee Calculator

#1

Calculate the net amount received after PayPal fees are deducted from a transaction.

Financial Calculators 5 variants

Volume to Weight Calculator

Calculates the weight of a material based on its volume and density.

Construction & Home 4 variants

Fertilizer Requirement Calculator

Calculate the total amount of fertilizer needed based on total area and application rate.

Construction & Home 4 variants

Net Present Value (NPV) Calculator

Calculate the Net Present Value of an investment based on initial investment, annual cash flow, discount rate, and number of years.

Financial Calculators 4 variants

Capital Gains Tax Calculator

Calculate the total capital gains tax owed on an asset sale based on purchase price, selling price, and tax rate.

Financial Calculators 4 variants

LDL to HDL Cholesterol Ratio Calculator

Calculates the LDL to HDL cholesterol ratio to help assess cardiovascular risk.

Health & Fitness 4 variants
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All Calculators

505 total
Molarity Calculator Calculates the molar concentration (molarity) of a solution based on mass, molar...
Chemistry & Biology
EN
Population Density Calculator Calculate the population density of a region based on total population and total...
Statistics & Probability
EN
Ellipse Circumference Calculator (Ramanujan Approximation) Computes the approximate circumference (perimeter) of an ellipse using Ramanujan...
Math Calculators
EN
Topsoil Calculator Estimate the amount of topsoil needed in cubic yards for a rectangular area.
Construction & Home
EN
Work Hours Required Calculator Calculate how many work hours are needed to afford a specific item based on hour...
Financial Calculators
EN
Heat Energy Calculator Calculate the amount of heat energy required to change the temperature of a subs...
Science & Engineering
EN
Body Surface Area (BSA)–Based Dosage Calculator Estimates total medication dose using the Mosteller BSA formula.
Health & Fitness
EN
Interest Coverage Ratio (ICR) Calculator Calculates how easily a company can pay interest on its outstanding debt using E...
Business & Retail
EN
Adjusted R-Squared Calculator Calculates the Adjusted R² value for a regression model using R², sample size, a...
Statistics & Probability
EN
Karl Pearson’s Coefficient of Skewness Calculator Calculate the skewness of a dataset using Karl Pearson’s Coefficient of Skewness...
Statistics & Probability
EN
Water Heating Time Calculator Estimates the time required to heat water based on mass, temperature change, and...
Science & Engineering
EN
EBITDA Margin Calculator Calculate a company's EBITDA margin as a percentage of total revenue.
Business & Retail
EN