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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Pythagorean Theorem Calculator

#1

Calculate the hypotenuse of a right triangle.

Math Calculators 5 variants

Profit Margin Calculator

Calculate profit margin percentage.

Business & Retail 5 variants

Percentage Calculator

Calculate percentages, percentage increase, decrease, and find what percentage one number is of another.

Math Calculators 6 variants

Car Lease Calculator

Calculate estimated monthly car lease payments.

Financial Calculators 5 variants

Elastic Potential Energy Calculator

Calculates the elastic potential energy stored in a stretched or compressed spring using the standard physics formula.

Science & Engineering 4 variants

Topsoil Calculator

Estimate the amount of topsoil needed in cubic yards for a rectangular area.

Construction & Home 4 variants
All Tools Calculators Converters Generators Makers Checkers

Calculators

327 total
Household Electricity Carbon Footprint Calculator Estimates the monthly carbon emissions based on household electricity usage and...
Science & Engineering
EN
Serum Osmolality Calculator Estimates calculated serum osmolality using sodium, glucose, and blood urea nitr...
Health & Fitness
EN
Pool Chlorine Requirement Calculator Calculate how much chlorine (in grams) is needed to raise your swimming pool’s f...
Construction & Home
EN
Mass-Spring System Period Calculator Calculates the period of oscillation for a mass-spring system using Hooke’s Law.
Science & Engineering
EN
Total Daily Commute Cost Calculator Calculate the total daily round-trip commute cost including fuel expenses and th...
Travel & Geography
EN
Adjusted Body Weight (AdjBW) Calculator Calculates Adjusted Body Weight for clinical dosing and nutrition planning when...
Health & Fitness
EN
Sweat Rate Calculator Estimates an athlete’s sweat loss per hour during exercise.
Health & Fitness
EN
Terminal Velocity Calculator Calculate the terminal velocity of a falling object using mass, gravity, air den...
Science & Engineering
EN
Roof Snow Load Calculator Calculate the snow load on a roof based on snow depth and snow density.
Construction & Home
EN
Current Ratio Calculator Calculate a company's Current Ratio to measure its ability to pay short-term obl...
Business & Retail
EN
Reynolds Number Calculator Calculates the Reynolds number (Re) for fluid flow in a pipe or around an object...
Science & Engineering
EN
Sleep Debt Calculator Estimate total accumulated sleep debt over a selected period based on recommende...
Health & Fitness
EN