Calculate your estimated due date from the first day of your last period. Get trimester dates and important pregnancy milestones. Everything runs locally in your browser — nothing is uploaded.
Track your fertile window and estimated ovulation date based on your last menstrual period. Helps with family planning. Everything runs locally in your browser — nothing is uploaded.
Calculate keto diet macros including protein, fat, and carbs. Get your personalized macronutrient targets for the ketogenic diet. Everything runs locally in your browser — nothing is uploaded.
Calculate running pace from distance and time. Enter your run details to find pace per kilometer and speed in km/h. Everything runs locally in your browser — nothing is uploaded.
Calculate the day number of the year for any date. Find out which day of 365 (or 366) a specific date represents. Everything runs locally in your browser — nothing is uploaded.
Find the ISO week number for any date. Also shows the day of the week and the current week of the year. Everything runs locally in your browser — nothing is uploaded.
Pregnancy Due Date Calculator lets you calculate your estimated due date from the first day of your last period. Get trimester dates and important pregnancy milestones. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Calculate your estimated due date from the first day of your last period. Get trimester dates and important pregnancy milestones. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Enter numeric values in the input fields — amounts, rates, or percentages.
Yes. After the initial page load, Pregnancy Due Date Calculator runs entirely on your device with no internet connection needed. All processing is done locally.
Yes, this tool is completely free with no usage limits, registration, or credit card required.
All processing happens locally in your browser. Your data is never uploaded to any server.
Yes. After the initial page load, the tool runs entirely offline without requiring an internet connection.
No. You can use this tool unlimited times with no quotas or restrictions.
Any modern web browser (Chrome, Firefox, Safari, Edge) on desktop or mobile. No installation needed.
BMI Calculator
Computes Body Mass Index from metric or imperial height and weight inputs, categorizing the result into underweight, normal, overweight. Everything runs locally in your browser — nothing is uploaded.
BMR Calculator
Calculates Basal Metabolic Rate using the Mifflin-St Jeor equation with age, sex, height, and weight. Nutritionists use it for diet planning. Everything runs locally in your browser — nothing is uploaded.
BMI Calculator for Kids
Calculate BMI for children with age and gender considerations. Track childhood growth and weight status. Everything runs locally in your browser — nothing is uploaded.
Body Fat Percentage Calculator
Calculate body fat percentage using the US Navy circumference method. Enter waist, neck, height, and hip measurements. Everything runs locally in your browser — nothing is uploaded.
Body Surface Area Calculator
Calculate Body Surface Area using the Mosteller formula. Enter height and weight for medical and fitness BSA measurements. Everything runs locally in your browser — nothing is uploaded.
Baby Formula Calculator
Calculate daily baby formula amount based on weight and age. Get recommended ounces and milliliters per feeding. Everything runs locally in your browser — nothing is uploaded.