Calculators Universe
A comprehensive collection of free online calculators to meet all your needs—from health and finance to academics and science.
Health & Fitness
Kidney Function (eGFR) Calculator
Estimate your Glomerular Filtration Rate
Diabetes Risk Calculator
Assess your risk for type 2 diabetes
Sleep Calculator
Find the best time to wake up or go to sleep
Life Expectancy Calculator
Estimate your remaining life expectancy
Heart Rate Calculator
Calculate your target heart rate for exercise
Body Measurement & Fitness
BMI Calculator
Calculate your Body Mass Index
BMR Calculator
Calculate your Basal Metabolic Rate
Calorie Calculator
Estimate your daily calorie needs
Body Fat Percentage Calculator
Estimate your body fat percentage
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio
Ideal Weight Calculator
Calculate your ideal body weight
Lean Body Mass Calculator
Calculate your lean body mass
Pregnancy & Women’s Health
Nutrition & Diet
Financial
Math & Academic
Basic Calculator
Perform basic arithmetic operations
Percentage Calculator
Calculate percentages with ease
Age Calculator
Calculate age from date of birth
Date Calculator
Calculate the difference between dates
Square & Square Root Calculator
Calculate square and square root of a number
Cube & Cube Root Calculator
Calculate cube and cube root of a number
Pythagorean Theorem Calculator
Calculate the missing side of a right-angled triangle
Trigonometric Calculator
Calculate trig values for an angle
Geometry Calculator
Calculate area, perimeter, etc. for shapes
GPA Calculator
Calculate your Grade Point Average
Unit Converter
Convert between various units
Probability Calculator
Calculate the probability of events
Permutation & Combination Calculator
Calculate nPr and nCr
Mean, Median, Mode Calculator
Calculate statistical central tendency
Physics Calculators
Chemistry Calculators
Molarity & Molality Calculator
Calculate molarity and molality of solutions
Normality Calculator
Calculate the normality of a solution
Dilution Calculator
Calculate solution dilution parameters
pH & pOH Calculator
Calculate pH, pOH, [H⁺], and [OH⁻]
Molecular Weight Calculator
Calculate the molecular weight of a chemical formula