Free Online Calculators
From BMI to loans, tips to age — instant calculations at your fingertips.
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View all →Age Calculator
#1Calculate your exact age in years, months, and days. Find out how old you are or will be on any date.
Acceleration Calculator (a=Δv/t)
Calculate acceleration, velocity change, or time using a=Δv/t. Perfect for kinematics and motion problems.
Full-Time Equivalent (FTE) Calculator
Calculates the number of full-time equivalent employees based on total hours worked during a specific period.
Cone Volume Calculator
Calculates the volume of a cone using its radius and height.
Child Waist-to-Height Ratio Calculator
Estimates a child's waist-to-height ratio using waist circumference and height entered in the same unit.
Child Waist-to-Height Ratio Calculator
Calculates the child waist-to-height ratio using waist circumference and height measurements.