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Most popular calculators
Waist-to-Hip Ratio (WHR) Calculator
Use our waist-to-hip ratio calculator to quickly assess your body shape and health risk. Supports cm and inches, with separate cut-offs for men and women.
Waist-to-Height Ratio (WHtR) Calculator
Free waist-to-height ratio calculator. Enter your height and waist in cm or inches to get WHtR, health risk category, and simple interpretation.
Cholesterol Ratio Calculator
Free cholesterol ratio calculator. Enter total, HDL, LDL and triglycerides to get TC/HDL, LDL/HDL, TG/HDL, non-HDL and estimated LDL in seconds.
Fraction to Percentage Calculator
Convert fractions to percentages and percentages to fractions instantly. Enter n, d or p% and see live, simplified results.
Percentage Decrease Calculator
Instantly calculate percent decrease, final value, and difference with this interactive percent decrease calculator. Free, accurate, and easy to use.
Percentage Change Calculator
Use our Percentage Change Calculator to quickly find percent increase or decrease between two values. Instant results, step-by-step breakdown, free & easy to use.
Percentage Calculator
Calculate percent of a number, what percent one number is of another, and find the whole from a percent. Live-sync results.
Percentage of a Percentage Calculator
Calculate percentage of a percentage, cumulative percent, and final value from any input. Instant syncing fields. Free online tool.
Average Percentage Calculator
Calculate the average of multiple percentages fast. Use simple or weighted average, add rows, and get accurate results instantly with our free online calculator.
Height Calculator
Estimate your child’s future adult height using Khamis–Roche or mid-parental method. Works in cm/kg or ft/in/lb. Fast & free.
IQ PERCENTILE CALCULATOR
Calculate your IQ percentile using μ=100 and σ=15 or 16. See percentile plus percent above and below instantly with live results.
Child Height Percentile Calculator
Check your child’s height percentile (0–5 years) using the WHO LMS method. Enter age, sex, and height to get percentile, z-score, and band.