Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Pregnancy Due Date Calculator

Estimate days until estimated due date using Naegele's rule from the date of last menstrual period and cycle length. Returns a single number of days for educational use, not a substitute for prenatal clinical confirmation.

Last Menstrual Period Month

Day of Last Period

Year of Last Period

Average Cycle Length

Fill in the required fields to see your result.

Fitness

Daily Calorie Needs Calculator

Estimate total daily calorie needs (TDEE) by combining the revised Harris-Benedict BMR formula with an activity multiplier. The number to eat at for maintenance, subtract from for fat loss, or add to for muscle gain.

Weight (kg)

Height (cm)

Age (years)

Activity Level

Fill in the required fields to see your result.

Key differences

	Pregnancy Due Date Calculator	Daily Calorie Needs Calculator
Category	Medicine	Fitness
Inputs required	4	4
Result	Days Until Due Date (days)	Daily Calories Needed (kcal)
What it does	Estimate days until estimated due date using Naegele's rule from the date of last menstrual period and cycle length. Returns a single number of days for educational use, not a substitute for prenatal clinical confirmation.	Estimate total daily calorie needs (TDEE) by combining the revised Harris-Benedict BMR formula with an activity multiplier. The number to eat at for maintenance, subtract from for fat loss, or add to for muscle gain.