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.

Simplify the process of calculating age for people or events, improving the efficiency of age-related tasks while guaranteeing accurate date-based calculations with ease.

EPC label, EPBD MEPS compliance, and stranding-risk screening across 8 EU markets — primary energy, solar obligation, renovation cost, and cap-rate discount modelling for lenders and asset managers.

A globally usable mortgage and loan calculator supporting multiple currencies. Covers monthly repayments, full amortisation schedules, affordability reverse-calculation, early repayment savings, side-by-side comparison, total cost of ownership, APR, debt-to-income ratio, stamp duty estimates, refinance break-even, balloon payments, interest-only periods, loan consolidation, and biweekly payment options. Pure maths — no external data sources. Pass any currency code (USD, GBP, EUR, ZAR, AUD, etc.) for localised display.

UK Making Tax Digital for Income Tax Self Assessment (MTD ITSA) mandation threshold and start date, by qualifying income. Independent product — not affiliated with HMRC.

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.

Explore innovative monotile solutions and push design boundaries with our Innovative Aperiodic Monotile Generator API.

Checks translated JSON, localization strings, placeholders, ICU messages, missing keys, extra keys, empty values, untranslated values, and multi-locale consistency.

Gain valuable insights into building energy compliance with our Developer Insight Developer Insight EU Building Energy Compliance API for informed decisions.

Optimize your acquisition strategies with our Acquisitions Focused Acquisitions Focused EU Building Energy Compliance API, ensuring energy-efficient properties.

Protect your financial exposure with our Comprehensive Comprehensive EU Building Energy Compliance API for Financial Exposure ensuring robust compliance across all standards.

Assess risk effectively using our EU Building Energy Compliance Risk Assessment API, safeguarding your investments against non-compliance.

Streamline your lending processes with our Lender Focused Lender Focused EU Building Energy Compliance API tailored for energy efficiency standards.

Facilitate seamless compliance checks with our EU Building Energy Compliance API for Fund Compliance Teams designed specifically for Fund Compliance Teams.

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

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

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

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

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

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.

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

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

Learn about 13th month pay regulations to ensure compliance and attract talent globally.

Accurately detect and analyze facial landmarks with our Facial Landmarks Detection API, supporting up to 201 key points for precise facial feature and contour identification.