Specialized
4 free calculators & converters. Every tool runs entirely in your browser — nothing you type is uploaded.
Available calculators
Pregnancy Due Date Calculator
Free pregnancy due date calculator. Enter the first day of your last period to estimate your due date. Uses the clinically validated Naegele rule.
Ovulation Calculator
Free ovulation calculator. Enter your last period and cycle length to estimate when you ovulate and your most fertile days of the month.
BAC Calculator (Blood Alcohol)
Estimate your blood alcohol content (BAC) from drinks consumed, body weight, and time elapsed. Uses the Widmark formula.
Blood Sugar Converter
Convert blood glucose between mg/dL and mmol/L. Quick reference chart for normal, prediabetic, and diabetic ranges.