Pregnancy Weeks Calculator and Due Date Estimator
Estimate pregnancy weeks, due date, current trimester and approximate month from the last menstrual period.
Tools
Tools
Choose a tool, fill in the fields and generate the result. Pages are short, clear and focused on the task.
HEX, RGB and HSL Color Generator
Generate colors, convert HEX, RGB and HSL, and preview contrast, complementary color and quick shades.
Surface Area Calculator
Calculate total surface area for a cube, sphere, cylinder or cone using any measurement unit.
Minecraft Chest and Shulker Calculator
Convert item counts into stacks, slots, single chests, double chests and shulker boxes.
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Character, Weapon and Map Wheel Generator
Paste your list and spin a quick wheel for characters, weapons, maps or any custom pool without repeats.
Game Currency Pack Calculator
Compare virtual currency packs, find the best value and estimate how much you would spend to hit your target.
Game Inventory Slot Calculator
Find how many inventory slots you need, how many full stacks fit, and how many leftover items remain.
Upgrade Cost Calculator
Estimate expected cost, average attempts and cumulative success chance for upgrade systems.
Mass Calculator
Calculate mass from density and volume with common metric and lab-style units.
Wind Chill Calculator
See how cold the air feels once wind speed starts pulling heat away from exposed skin.
Resistor Calculator
Add resistors in series or parallel and decode 4-band resistor color codes on one page.
FPS Ammo Calculator
Estimate hits, total shots and magazine needs to take down a target.
Minecraft /weather Command Generator
Build a Minecraft /weather command with the weather type and optional duration in seconds.
Voltage Drop Calculator
Estimate voltage drop for DC, single-phase, and three-phase circuits using length and cable resistance.
Horsepower Calculator
Convert torque and RPM into horsepower, kilowatts and metric horsepower.
Sales Tax and VAT Calculator
Calculate net price, tax amount, and final total with tax-exclusive or tax-inclusive pricing.
Drop Chance Calculator
Estimate your cumulative chance of getting at least one drop after repeated attempts and see how many runs it may take.
Bandwidth and Download Time Calculator
Estimate how long a file should take to download based on file size, connection speed and real-world link efficiency.
BTU Calculator for Air Conditioners
Estimate the BTU/h your room needs from size, ceiling height, occupancy, sunlight and kitchen use.
Gravel Calculator
Estimate area, gravel volume and weight with adjustable depth units and material density.
Minecraft Nether ↔ Overworld Coordinate Converter
Convert Minecraft coordinates between the Nether and the Overworld with exact and rounded values.
Stair Calculator
Estimate risers, treads, total run, angle, and footprint for a straight stair.
Schema Markup Generator
Generate JSON-LD for Article, Product, FAQ, LocalBusiness, Recipe, and other schema types in one tool.
Random String Generator
Generate random strings with letters, numbers, symbols, prefixes, suffixes, and custom exclusions.
Drawer Volume Calculator (Litres)
See how many litres fit in a drawer based on the outer dimensions and material thickness.
Miter Angle Calculator
Calculate the saw cut angle and the real length factor for a miter joint.
Pythagoras Diagonal Calculator
Calculate the diagonal of a right triangle, check square, area and angles.
Carpentry Square Check (3-4-5)
Check if a piece of furniture is square by measuring sides and diagonal with the 3-4-5 rule.
Hinge Quantity Calculator
See how many hinges to use on a door based on height and the actual leaf weight.
How to choose the right tool
Use search when you already know the task name and browse tags when you want to compare similar options. Public pages are organized for quick decisions, review and small workflows.
What to check before picking one
Check whether the tool matches the unit, format or context of your task. When more than one option looks similar, compare the summary, fields and related links before you commit to one.