Due date from embryo transfer date. Day-3, day-5, day-6 and egg retrieval calculated separately.

Conception date from a last menstrual period or from a known due date, as ISO 8601 dates

Dating from BPD, HC, AC and FL measurements in millimetres, using Hadlock 1984 equations.

Due date from last menstrual period using Naegele's rule, with 21-45 day cycle length correction.

Trimester boundaries, 24w0d viability, and four preterm and four term classes with their dates.

Pregnancy due date and gestational age API. EDD from LMP, conception, IVF transfer day, or ultrasound CRL. ACOG redating rules, trimester, and term milestones. Deterministic ISO 8601 dates.

Antenatal visit dates from the WHO 2016, NICE or ACOG published schedules, as calendar dates.

Ovulation estimate and 6-day fertile window from cycle length. Not contraceptive guidance.

Gestational age at any given date, returned as a 29w2d label and as total days.

Applies ACOG Committee Opinion 700 Table 1 to decide whether an ultrasound overrides LMP dating.

Welcome to the Pregnancy Calculator API. This API provides endpoints for calculating Fertility Window, Pregnancy Due Date, Pregnancy Week, and Pregnancy Weight Recommendation. With this API, you can easily integrate these calculations into your applications, websites, or any other projects.

Calculates business days, SLA due dates, holiday-aware deadlines, skipped weekends and holidays, business hours, and business-time durations.

Trust our Reliable API for consistent date and business day calculations, ensuring you never miss a deadline again.

Count working days between two dates or add business days to a date, skipping weekends and public holidays of 100+ countries and regions.

Get precise results every time with our Accurate API for calculating dates and business days—perfect for business professionals.

Automate age calculations for individuals or events, streamlining age-related tasks and ensuring precise date computations effortlessly.

Enhance your scheduling with the Smart API, designed to simplify date and business day calculations with intelligence.

Horoscope Date API is a powerful tools that provide developers with access to a vast database of astrological information, including horoscopes, zodiac signs, and other related data.

Libera.Date.Api is a high-precision date calculation engine designed to streamline business logic for global applications. Its core strength lies in its advanced Working Days System, which accurately calculates business days by automatically excluding weekends and public holidays for multiple countries (including 100 countries). Beyond simple duration checks, the API offers intelligent scheduling tools like finding the nearest available working day, analyzing date ranges for non-working intervals, and distinguishing between standard weekends and legal holidays. Whether you are computing SLAs, planning delivery windows, or building HR rosters, Libera.Date.Api ensures your dates align with real-world business calendars.

Accurate business-day, holiday, and scheduling math for major countries and their subdivisions — without maintaining a single holiday calendar yourself. Add or subtract working days, check if a date is a business day, find the next valid date, or count working days between two dates, with full support for regional subdivisions, custom weekends, and your own blackout dates. One simple GET call, instant JSON.

Automate age calculations for individuals or events, streamlining age-related tasks and ensuring precise date computations effortlessly.

The Global API delivers seamless date and business day calculations worldwide, catering to international business needs.

Job postings from a company Workday careers site, with title, location, type and date.

The Flight Futures Fetcher API provides effortless entry to forthcoming flight schedules, delivering crucial information including details about aircraft, departure times, airline specifics, and flight numbers.

Access real-time earnings announcements with our API, keeping you updated on important market events.