Utility & Everyday Tools

Square Footage Calculator

Calculate area in square feet from room dimensions for flooring, painting, and more

Tip Calculator

Calculate tip amount, total, and per-person split

Online Compass

Digital compass using your device's magnetometer sensor

Split Bill Calculator

Split a total evenly across a group

Receipt Total Calculator

Add line items, tax, discounts, tip, and split totals instantly

Shopping List Builder

Build a smart shopping list with quantities, categories, and budget tracking

Travel Packing List Generator

Generate a practical packing checklist by trip length, climate, activities, and bag type

Luggage Size Checker

Check if luggage dimensions meet airline carry-on and checked bag limits

Countdown Timer

Start a simple countdown timer in your browser

Stopwatch

Track elapsed time with a simple stopwatch

Pomodoro Timer

Focus timer with work and break intervals

Public Speaking Timer

Practice speech timing with visual warning cues and pacing checkpoints

Egg Timer

Perfect boiled eggs with presets for soft, medium, and hard

Time Until Calculator

Calculate time remaining until any date or event

Package Volume Calculator

Calculate package dimensions and shipping volume

Aspect Ratio Calculator

Calculate and visualize aspect ratios for images and video

Electricity Usage Calculator

Calculate electricity costs for appliances based on wattage, usage hours, and rate

Viewing Distance Calculator

Find the optimal TV, monitor, or projector viewing distance

Monitor Mount Checker

Check if a monitor mount supports your monitor based on size, weight, and VESA pattern

Barcode Generator

Generate EAN-13, UPC-A, and Code 128 barcodes

Barcode Scanner

Scan barcodes from photos or camera - reads EAN-13, UPC-A, Code 128, and more

QR Code Generator

Generate QR codes from text, URLs, and more

QR Code Camera Scanner

Scan QR codes using your device camera in real-time

QR Code Batch Generator

Generate multiple QR codes at once from a list of URLs or text

Phone Level & Inclinometer

Use your phone as a digital spirit level and angle meter

Slope Angle Measurement Tool

Measure slope angles using device sensors. Shows degrees, percentage grade, and rise:run ratio

Gravity Vector Visualizer

Visualize gravity direction with real-time accelerometer data

Vibration Frequency Analyzer

Measure vibration frequency using your phone's accelerometer

Camera Horizon Alignment Tool

Level your camera using device sensors for perfectly aligned photos

ImageCapture takePhoto() Demonstrator

Take full-resolution photos with the ImageCapture API, inspect PhotoCapabilities and all metadata

Simultaneous Audio + Photo Capture

Proof that browsers can record microphone audio and take full-resolution photos at the same time

Impact Acceleration Viewer

Measure and visualize impact forces and acceleration using your device's accelerometer

Fuel Economy Calculator

Calculate MPG or L/100km from distance traveled and fuel used

Gas Cost Calculator

Calculate trip fuel cost from distance, fuel efficiency, and gas price

EV Charging Cost Calculator

Estimate electric vehicle charging costs, charging time, and compare EV vs gas savings

Distance Time Speed Calculator

Solve for distance, speed, or time with unit conversion and trip pace insights

Electricity Cost Calculator

Estimate electricity costs for appliances by wattage and usage

Flashlight Screen Tool

Turn your screen into a bright flashlight with fullscreen color and strobe modes

Pie Chart Generator

Create customizable pie charts from your data with percentages and labels

Bar Chart Generator

Create customizable bar charts with horizontal or vertical orientation

Line Chart Generator

Create customizable line charts with multiple series and smooth or straight lines

Histogram Generator

Create histograms from numeric data with adjustable bins and statistics

Scatter Plot Generator

Create scatter plots from XY data with trend lines and correlation analysis

Size Comparison Visualizer

Visually compare dimensions of two objects side by side with accurate scaling

Gyroscope Drift Visualizer

See how your phone's gyroscope accumulates error over time

Line Straightness Visualizer

Test your display for distortion with straight line patterns

Pixel Density Visualizer

Calculate PPI from screen size and resolution

Screen Size Visualizer

Compare monitor, TV, and device screen sizes at scale

Screen Color Uniformity Test

Test display tint, banding, and brightness uniformity with fullscreen color patterns

Screen Ruler Calibration Tool

Calibrate your screen to display accurate physical measurements

Meeting Cost Calculator

Calculate the true cost of meetings based on attendees and duration

Perspective Distortion Checker

Overlay grid patterns on images to detect lens distortion and perspective issues

Edge Straightness Analyzer

Analyze edge straightness using device camera. Upload or capture an image, draw a line along an edge, and measure deviation from straight

Price Per Unit Calculator

Compare product prices across different sizes to find the best value

Unit Price Comparison Calculator

Compare 2-4 products by unit price with visual ranking, savings percentages, and instant best deal finder

Random Letter Generator

Generate random letters from A-Z, vowels, consonants, or custom sets

Image to PDF Converter

Convert images to PDF. Combine multiple JPG, PNG, or WebP images into a single PDF file.

Cable Length Estimator

Estimate required cable length with route style, slack, and standard size recommendations

Charging Time Estimator

Estimate battery charging time, wall energy use, and electricity cost from charge level, capacity, and charger power

Concrete Calculator

Calculate concrete volume, bag counts (40/60/80 lb), and cost for slabs, columns, footings, and walls

Concrete Block Calculator

Calculate blocks needed for walls, mortar quantity, number of courses, and estimated cost with waste factor

Tile Calculator

Calculate tile quantity, grout needed, and cost for floors, walls, and backsplashes with waste factor

Board Foot Calculator

Calculate board feet of lumber from thickness, width, and length with cost estimation

Lumber Calculator

Estimate lumber quantity and cost for framing, decking, or fencing projects from dimensions

Flooring Calculator

Calculate amount of flooring material needed for wood, laminate, or vinyl with waste factor and cost estimate

Paint Calculator

Calculate how much paint you need for walls and ceilings with door and window deductions

Gravel Calculator

Calculate gravel volume, weight, and cost for driveways, pathways, and landscaping projects

Fence Calculator

Calculate fence posts, rails, pickets, and concrete needed for your fence project

Drywall Calculator

Calculate drywall sheets, joint compound, tape, and screws needed for walls and ceilings

Decking Calculator

Calculate deck boards, joists, screws, and footings for your deck project

Email Signature Generator

Create professional HTML email signatures with live preview and one-click copy

Typing Speed Test

Test your typing speed (WPM) and accuracy with detailed statistics

Email Signature Generator

Create professional HTML email signatures for Gmail, Outlook, and Apple Mail

Window Blind Size Checker

Check if blinds fit your window dimensions for inside or outside mount

Audio Motion Correlation Visualizer

Visualize correlation between audio input and device motion in real-time

World Clock

View current time in multiple cities and time zones simultaneously

Invoice Generator

Create professional invoices with line items, tax, and print support

Insulation Calculator

Calculate insulation R-value requirements, materials, and costs

Wallpaper Calculator

Calculate how many rolls of wallpaper you need for any room with pattern repeat support

Carpet Calculator

Calculate carpet square footage, rolls, and cost for any room

Carbon Footprint Calculator

Estimate your annual CO2 emissions from transportation, energy, food, and shopping

Dew Point Calculator

Calculate dew point from temperature and humidity with comfort level indicator

Heat Index Calculator

Calculate feels-like temperature from air temperature and humidity

Temporary Notes App

Quick disposable notepad for scratch notes that auto-delete when you close the tab

Tire Size Calculator

Compare tire sizes and calculate speedometer differences

TV Size Distance Calculator

Find the ideal TV size for your viewing distance or optimal distance for your TV

Pet Food Portion Calculator

Calculate daily food portions for dogs and cats by weight and activity level

Fuel Cost Calculator

Estimate fuel costs for trips and commutes with vehicle comparison and efficiency tips

Roof Pitch Calculator

Calculate roof pitch, slope angle, rafter length, and area multiplier with material recommendations

Pool Volume Calculator

Calculate pool water volume in gallons and liters for chemical treatment, filling time, and heating costs

Wind Chill Calculator

Calculate wind chill temperature and frostbite risk from temperature and wind speed

Gas Mileage Calculator

Calculate fuel efficiency, trip fuel costs, and compare vehicle gas mileage

Tip Split Calculator

Split restaurant bills with tip among any number of people

Deck Cost Calculator

Estimate deck building costs by size, material, and features

Mulch Calculator

Calculate how much mulch you need in cubic yards and bags for your garden beds

Electric Bill Calculator

Estimate your monthly electricity bill from appliance usage and rate

Aquarium Volume Calculator

Calculate aquarium water volume and weight for rectangular, bow-front, and cylindrical tanks

Lawn Fertilizer Calculator

Calculate how much fertilizer to apply based on lawn size, grass type, and NPK ratio

Paver Calculator

Calculate how many pavers you need for a patio, walkway, or driveway with base material

Color Temperature Converter

Convert Kelvin color temperature to RGB values with visual preview and lighting presets

Oven Temperature Converter

Convert between Fahrenheit, Celsius, and Gas Mark for cooking with common baking temperature presets

Shoe Size Converter

Convert between US, UK, EU, and CM/JP shoe sizes for men, women, and children

Rain Barrel Calculator

Calculate rainwater harvest potential from your roof area and local rainfall

Appliance Energy Calculator

Calculate electricity costs for any household appliance based on wattage and usage

Bathroom Remodel Cost Calculator

Estimate bathroom renovation costs by size, fixtures, and finish level

Land Area Calculator

Calculate land area in acres, hectares, square feet, and square meters for any shape

Water Heater Cost Calculator

Calculate annual water heating costs and compare gas vs electric vs tankless

Cubic Yard Calculator

Calculate cubic yards for landscaping, concrete, gravel, mulch, and other materials

Asphalt Calculator

Calculate hot mix asphalt tonnage and cost for driveways, parking lots, and road paving projects

Post Hole Calculator

Calculate concrete bags and gravel needed for fence and deck post holes

Siding Calculator

Calculate siding materials, panels, trim, and cost for home exterior projects with window and door deductions

Retaining Wall Calculator

Calculate blocks, gravel, base material, and cost for building a retaining wall

Septic Tank Size Calculator

Determine the right septic tank size based on bedrooms, occupants, water usage, and soil type

Concrete Stair Calculator

Calculate concrete volume, step dimensions, and building code compliance for concrete stairs

Window Replacement Cost Calculator

Estimate window replacement costs by type, frame material, glass, and installation with energy savings analysis

Heat Pump Calculator

Size heat pumps and compare energy costs vs gas furnace, electric resistance, and oil heating systems

Concrete Volume Calculator

Calculate concrete volume for slabs, columns, triangles, and curbs with bag estimates and cost

Lawn Care Calculator

Calculate seed, water, mowing, and top dressing needs for lawn care based on grass type and lawn size

Dog Food Calculator

Calculate daily food portions for dogs based on weight, age, activity level, and food type

Wire Length Calculator

Calculate electrical wire length needs with voltage drop analysis and NEC compliance checking

Bathroom Tile Calculator

Calculate tiles, grout, and thinset needed for bathroom floors, walls, and showers with cost estimation

Water Bill Calculator

Estimate your monthly water bill with tiered pricing, sewer charges, and usage comparison

Paint Mixing Ratio Calculator

Calculate paint mixing ratios for automotive, industrial, and art applications with batch scaling

Concrete Patio Calculator

Calculate concrete volume, bags, rebar, and cost for patios in rectangle, circle, and L-shapes

Rain Gutter Calculator

Calculate gutter size, downspouts, brackets, and materials needed for your roof drainage system

Sourdough Bread Calculator

Calculate baker's percentages, hydration, starter feeding, and baking timeline for sourdough bread

Concrete Driveway Calculator

Calculate concrete volume, bags, and cost for driveway projects

Concrete Footing Calculator

Calculate concrete volume, bags, and cost for continuous, pier, and spread footings

Window AC Size Calculator

Find the right BTU window air conditioner for your room size and conditions

Sod Calculator

Calculate sod rolls, pallets, and cost for rectangular, circular, or irregular lawns

Paint Drying Time Calculator

Estimate paint drying and curing times based on paint type, temperature, and humidity

Water Softener Calculator

Size a water softener based on hardness, household size, and water usage

Gutter Size Calculator

Calculate gutter and downspout sizes based on roof area, pitch, and rainfall intensity

Floor Tile Calculator

Calculate tiles needed for any room with grout gap, waste factor, and cost estimation

IBU Bitterness Calculator

Calculate International Bitterness Units for homebrewing using the Tinseth formula

Priming Sugar Calculator

Calculate priming sugar amounts for bottle conditioning beer with residual CO2 correction

Hydrometer Temperature Correction

Correct hydrometer specific gravity readings for temperature variations

Mash Water Calculator

Calculate strike water volume and temperature for all-grain brewing