Free Online Calculators

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

503 Calculators 18 Categories 100% Free

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100 Calculators

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Average Calculator

#1

Calculate the average of multiple numbers.

Math Calculators 5 variants

Rectangular Prism Surface Area Calculator

Calculate the total surface area of a rectangular prism using its length, width, and height.

Math Calculators 4 variants

Torque Calculator

Calculates torque using the physics formula τ = F × r.

Science & Engineering 4 variants

Newborn Name Generator

Generates a unique name for a newborn based on selected criteria.

Date & Time 0 variants

Dew Point Calculator

Estimates the dew point temperature based on air temperature and relative humidity using a common meteorological approximation.

Science & Engineering 4 variants

Cone Volume Calculator

Calculates the volume of a cone using its radius and height.

Math Calculators 4 variants
All Tools Calculators Converters Generators Makers Checkers

Calculators

503 total
Thin Lens Focal Length Calculator Calculates the focal length of a lens using the thin lens equation based on obje...
Science & Engineering
EN
Percentage Change Calculator Calculates the percentage increase or decrease from the original value to the ne...
Math Calculators
EN
Voltage Gain Calculator Calculates the voltage gain (Av) of an amplifier or circuit using output and inp...
Electrical & Electronics
EN
Total Home Price Calculator Calculate the total home price based on price per square foot and total area.
Financial Calculators
EN
Maximum Loan Amount Calculator Calculates the maximum loan principal a borrower can afford based on desired mon...
Financial Calculators
EN
Macaulay Duration Calculator Estimates the weighted average time (in periods) it takes to receive a bond’s ca...
Financial Calculators
EN
Parallel Resistor Calculator Calculates the total resistance of two resistors connected in parallel.
Electrical & Electronics
EN
Work From Home Savings Calculator Calculate how much money you save per month by working from home instead of comm...
Financial Calculators
EN
Loan Constant Calculator Calculates the loan constant (mortgage constant), which is the ratio of annual d...
Financial Calculators
EN
PaO₂/FiO₂ Ratio (P/F Ratio) Calculator Calculates the P/F ratio to assess oxygenation efficiency in clinical settings.
Health & Fitness
EN
Horizontal Projectile Range Calculator Calculates the horizontal distance traveled by an object launched horizontally f...
Science & Engineering
EN
Ovulation Day Estimator Estimates the ovulation day based on menstrual cycle length and luteal phase len...
Health & Fitness
EN