Pregnancy Due Date & Gestational Milestones Tracker
Track estimated due date (EDD), gestational age, fetal development sizes, and trimester milestones.
Pregnancy Parameters
6 Weeks & 0 Days
42 days elapsed of 280
Thursday, May 13, 2027
238 days remaining until delivery
Organs are forming rapidly. You may feel fatigue or morning sickness.
Week 6 Size Equivalent
The heart tube is beating regularly. Tiny buds that will become arms and legs are appearing.
Explore Additional Utilities
Exposure Triangle & F-Stop
Calculate absolute stop adjustments, exposure reciprocal tradeoffs, f-stop quotients, and ISO noise tradeoffs.
Dewpoint & Relative Humidity Calculator
Calculate dewpoint, relative humidity, or air temperature using the Magnus-Tetens formula.
Body Surface Area (BSA) Calculator
Calculate body surface area (BSA) for clinical dosing using Mosteller, DuBois, Haycock, and Gehan-George formulas.
Flow Rate Converter
Convert volumetric flow rates between cubic meters per second (m³/s), liters per minute (L/min), gallons per minute (GPM), and other flow units.
Becquerel ↔ curie (Activity)
Convert between Becquerels (Bq), Curies (Ci), rutherfords, and decay rates to evaluate isotope source strengths and nuclear decay events.
Pump Efficiency Calculator
Calculate pump efficiency and hydraulic power based on volumetric flow rate, head height, fluid density, and input shaft power.
Translation Pages & Pricing Converter
Convert document page count to word and character counts, and calculate translation pricing for multiple languages and target audiences.
One Rep Max (1RM) Calculator
Estimate your single repetition maximum lifting capacity (1RM) using major clinical lifting models (Epley, Brzycki, Lander).
Oxygen Saturation & PaO2 Converter
Convert blood oxygen saturation (SpO2) to partial pressure of oxygen (PaO2) using the clinical Severinghaus-Ellis model.
Soil Compaction Ratio Calculator
Calculate and convert soil compaction ratio, loose volume, compacted volume, and shrink/swell factor for cut-and-fill operations.
Depth ↔ Geostatic & Hydrostatic Pressure
Determine lithostatic (rock overburden) and hydrostatic (fluid) pressure at custom geological underground depths or deep underwater.
Drift calculation — wind speed ↔ canopy speed → landing offset
Calculate descent drift offset distance, wind deflection angles, and flight heading corrections for precision landing dropzones.
Honey yield — hive strength ↔ kg per season estimate
Estimate seasonal honey surplus production based on hive workforce size and local floral nectar flow conditions.
Carat weight ↔ grams
Convert between diamond or gemstone carats, metric grams, grains, and points of gem weight.
Animal Feed & Dry Matter Calculator
Convert animal body weight percentage dry matter intake (DMI) to daily feed requirements in kg/lbs, based on feed dry matter ratio and species presets.
Arrow spine ↔ draw weight + length — stiffness matching
Estimate required arrow static spine rating (stiffness) based on bow draw weight, arrow length, and bow type.
Fold ratio — paper thickness ↔ maximum folds possible
Compute theoretical limit of fold iterations possible for paper size and thickness (Britney Gallivan equation).
Pixel resolution — ground sample distance ↔ map scale
Calculate Ground Sample Distance (GSD), raster pixel resolutions, and minimum map scales for digital cartography and aerial imagery.
Spine width — page count + paper weight ↔ mm
Calculate spine width in millimeters from page count, paper weight (gsm or basis), and cover board thickness.
Jewel count ↔ movement quality indicator
Explore movement bearing counts from 1 to 30+ jewels. See where rubies are placed and how they reduce mechanical friction.