Compare calculators

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

Conception Date Calculator

Works backward from how many days remain until a known due date to estimate when conception occurred (and how far along you are). Switch the basis to LMP to account for your cycle length and luteal phase.

Days Until Due Date (days)

Average Cycle Length (days)

Luteal Phase Length (days)

Calculate From

Fill in the required fields to see your result.

Pregnancy

Maternity Leave Calculator

Estimate total paid maternity leave income by combining statutory benefit payments with any employer top-up. Use it when planning finances before taking parental leave.

Weekly Salary ($)

Total Leave Weeks (weeks)

Paid Leave Weeks (weeks)

Benefit Payment Rate

Employer Top-Up Benefits

Fill in the required fields to see your result.

Key differences

	Conception Date Calculator	Maternity Leave Calculator
Category	Pregnancy	Pregnancy
Inputs required	4	5
Result	Estimated Conception	Total Paid Benefits ($)
What it does	Works backward from how many days remain until a known due date to estimate when conception occurred (and how far along you are). Switch the basis to LMP to account for your cycle length and luteal phase.	Estimate total paid maternity leave income by combining statutory benefit payments with any employer top-up. Use it when planning finances before taking parental leave.