Health & fitness · NUMORA
Conception Date Calculator
LMP, conception, or transfer — three dating sketches.
Open interactive calculatorHow to use
LMP, conception, or transfer. Ultrasound wins.
Formula
EDD = LMP+280 = conception+266
FAQ
Is this Conception Date calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
LMP, conception, or transfer. Ultrasound wins.
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