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CALCULATION DESK
Add 280 days to a supplied last menstrual period (LMP) to estimate a due date. Also compute the current gestational age in completed weeks and days from the LMP.
WHAT THIS DOES
Runs entirely in your browser.
/tools/pregnancy-due-date-calculatorpregnancy-calcv4.0.0LOCAL · LOCAL RUNIMPLEMENTED — This workbench is functional in the current release.Presets for this workbench
No preset yet. A preset stores the values in this form — never the result — and only for workbenches that run entirely in your browser.
Collections
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METHOD / LOCAL RUN
Due date = LMP + 280 days. Gestational age = today − LMP in completed weeks/days.
Boundary: Estimate based on 280-day gestation, not a clinical assessment. Real due dates vary and require a clinician.
The calculation or transformation runs in your browser using the values entered above. No input is sent to UtilityForge for this tool.
EXAMPLES / LOCAL RUN FIXTURES
FAQ
No. The tool provides a calculation. Review material decisions with an appropriate professional source.
No. The pregnancy due date calculator runs locally.
The workbench states the exact method behind every result — the formula or procedure this page runs — so you can verify the computation instead of trusting a black box.
No. This workbench runs in the page: Last menstrual period are read by the code your browser already downloaded, and UtilityForge receives neither the values nor the result.
Estimate based on 280-day gestation, not a clinical assessment. Real due dates vary and require a clinician.
RELATED TOOLS
LOCAL — Runs entirely in your browser.
BEFORE YOU RELY ON THIS
Bodies and medications vary more than any formula assumes. This is an estimate for planning, not a diagnosis, dosage, or dietary instruction.
Method last reviewed against: Local date arithmetic; not a clinical tool.
How this was verifiedCOMMON USE CASES / SOURCE NOTE
Last reviewed:
Source information: Local date arithmetic; not a clinical tool.