This tool estimates the expected due date of pregnancy using your conception date. It calculates 280 days (40 weeks) from the date of conception, which is a standard method used by healthcare professionals around the world.

Due Date Calculator by Date of Conception

Enter the date of conception below to calculate your estimated due date.

Date of Conception

Estimated Due Date

The calculation process will appear here.

How to Use the Calculator

  1. Enter the date of conception in the “Date of Conception” input field.
  2. Click the Calculate Due Date button.
  3. The estimated due date will appear in the “Estimated Due Date” field.
  4. To copy the result, click the Copy Result button.
  5. To reset all fields and start a new calculation, click the Clear All button.

How to Calculate Your Due Date

Estimated Due Date = Date of Conception + 280 Days

The 280-day rule is based on the standard gestational period used by healthcare providers worldwide. For more details on how this calculation is derived, visit the National Center for Biotechnology Information (NCBI) page that explains gestational age calculation.

Due Date by Date of Conception Calculator

Real-World Examples

Conception and due dates of some famous people for reference.

  • Albert Einstein: Conceived around mid-May 1878, with a due date estimated to be mid-February 1879. He was born on March 14, 1879.
  • Frida Kahlo: Likely conceived in late September 1906, with an expected due date in late June 1907. She was born on July 6, 1907.
  • Barack Obama: Estimated conception date in mid-November 1960, with a due date around mid-August 1961. He was born on August 4, 1961.
  • Marie Curie: Conceived around early December 1866, with an estimated due date in early September 1867. She was born on November 7, 1867.
  • John Lennon: Estimated conception date in late December 1939, with a due date around late September 1940. He was born on October 9, 1940.
  • Steve Jobs: Likely conceived in mid-February 1955, with an expected due date in early November 1955. He was born on February 24, 1955 (premature).
  • Elvis Presley: Estimated conception date in mid-March 1934, with a due date in early December 1934. He was born on January 8, 1935.
  • Princess Diana: Likely conceived in early December 1960, with an estimated due date in early September 1961. She was born on July 1, 1961 (premature).
  • Pablo Picasso: Estimated conception date in late January 1881, with a due date in late October 1881. He was born on October 25, 1881.
  • Mahatma Gandhi: Likely conceived in late December 1868, with an expected due date in late September 1869. He was born on October 2, 1869.

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