Browse by Site

gridmaker.space

Free online grid overlay tool for reference photos and photo grid layouts.

gridlover.net

Gridlover.net hosts a Baseline Grid Calculator tool for designers and developers to create responsive layouts based on a 12-column grid system.

groupmixer.app

Free browser-based group generator for classrooms, workshops, and events with balanced grouping and repeat-pairing reduction.

guidecalculator.com

General-purpose calculator directory offering free online tools across many categories such as chemistry, finance, and health. ([guidecalculator.com](https://guidecalculator.com/))

guitarchalk.com

guitarchalk.com hosts BPM Calculator to help musicians determine the beats per minute for their songs.

hdfcbank.com

HDFC Bank is an Indian banking and financial services company. It provides a Bike EMI Calculator to help customers estimate their monthly installment payments for purchasing a bike.

hsh.com

HSH.com hosts financial tools for homeowners. Bi-weekly mortgage payment calculator is among its offerings to help manage home loans effectively.

hsrwarpcalc.com

Free browser calculator for Honkai: Star Rail gacha pulls, budgets, and banner planning.

htmlcolorcodes.com

htmlcolorcodes.com provides a simple tool to find and use HTML color codes, including a sample for beige.

hvac-load-calc.com

Free educational HVAC load calculator for estimating heating and cooling requirements for buildings.

hammerio.com

Free construction and home improvement calculators for estimating materials and costs.

tools.parryqiu.com

Multilingual suite of 32 free utilities for text processing, image handling, PDF manipulation, and developer tasks.

handymantoolkits.com

Free browser-based construction calculators for estimating materials and planning DIY projects.

happyhues.co

Happy Hues is a curated colour-palette inspiration site, showing palettes applied to a real interface for context.

health.harvard.edu

health.harvard.edu hosts a collection of health-focused tools designed to help users manage their well-being and make informed decisions about their health. Their BMI calculators provide a quick way for individuals to assess their body mass index, a key indicator of overall health.

headlinecapitalization.com

Capitalize titles and headlines to APA, MLA, Chicago, AP, and other style guide standards.

healthcalculatoronline.com

Health Calculator Online is healthcalculatoronline.com hosts various online calculators designed to help users make informed decisions about their health and nutrition. Their Baby Formula Calculator allows parents to quickly determine the right amount of formula for their baby based on age and weight.

calculators.doseway.com

Health Calculators by Doseway is a website that hosts various health-related calculators. It offers a Baby's Milk Intake Calculator to help parents determine appropriate milk feedings for their infants, based on factors like weight and age.

healthychildren.org

HealthyChildren.org (American Academy of Pediatrics) provides helpful tools for parents, including a Benadryl Dosage Calculator to assist with proper medication dosing.

healthyplace.com

Mental health and addiction content site that publishes an alcoholism screening test using AUDIT guidance. ([healthyplace.com](https://www.healthyplace.com/addictions/alcoholism/alcoholism-screening-test))

heatpumpwise.com

Heat pump calculators and guides for US homeowners—sizing, savings, rebates, and brand comparisons.

heymato.com

Free tools and guides for podcasters and content creators.

hibi-calc.jp

Free online calculators for mathematics, finance, science, and everyday conversions.

highlightcode.com

Free online tool for syntax-highlighting code and exporting formatted code to Word, OneNote, Google Docs, and documentation platforms.

holocardmaker.com

Turns photos and artwork into interactive holographic trading cards with customizable effects.

home-water-works.org

Home Water Works is a resource for homeowners looking to manage their water usage effectively. It offers tools like the Bath vs Shower Calculator to help users compare the water consumption of different bathing options and make informed decisions about saving water in the home.

hcuonline.com

Hometown Credit Union is an online resource for managing finances, offering tools like a Bank Reconciliation Calculator to help members keep track of their accounts accurately.

housenix.com

HouseNix offers a suite of real estate decision tools focused on mortgages, investing, and affordability. ([housenix.com](https://housenix.com/calculators?utm_source=openai))

howmuchwatts.com

Free online calculators for solar power, electricity costs, and energy systems analysis.

howmuchcouldiearn.com

Historical investment calculator for comparing Bitcoin, S&P 500, gold and stocks.

howto.bike

HowTo.Bike hosts Bike Gear Calculator, a tool to help you determine the right gear ratio for your bike based on your riding style and desired speed.

humanmetrics.com

Humanmetrics.com hosts various personality and career assessment quizzes to help individuals explore their interests, strengths, and potential career paths.

huntr.co

huntr.co hosts Before/After Transformer, an AI tool that compares images before and after a transformation for visual analysis and editing.

bgp.he.net

bgp.he.net provides a BGP AS Lookup tool to help identify and lookup Autonomous System (AS) numbers in the Border Gateway Protocol network.

hyperphysics.gsu.edu

HyperPhysics is an educational physics reference from Georgia State University with tables and explanations for electrical topics. ([hyperphysics.gsu.edu](https://www.hyperphysics.gsu.edu/hbase/Tables/wirega.html))

ilovecalculaters.com

I Love Calculaters is a site where users can find various online calculators and converters to simplify their daily tasks. One of its tools is a Banana Equivalent Dose Radiation Converter, which helps in understanding radiation exposure levels by converting them into banana equivalents for easier comprehension.

ilcalculator.org

Calculator website with multiple categories of tools and an 'Other Calculators' section. ([ilcalculator.org](https://ilcalculator.org/other-calculators/audiobook-speed/))

ilpi.com

ILPI (Interactive Learning Paradigms) is a platform that hosts educational tools to help users understand and calculate various parameters in fields like chemistry and engineering. Tools such as the Baume to Specific Gravity Density Converter allow for quick conversions between density units, aiding in practical problem-solving.

imcalculator.com

IM Calculator is a resource hosting various health and utility calculators, including Ast Alt Ratio, Barthel Index, and Bag Footprint Calculators.

iotools.cloud

IO Tools is a collection of online tools including converters, calculators, editors, and utilities. The site highlights a large catalog of tools and browsing by tool type. ([iotools.cloud](https://iotools.cloud/))

ipinfo.io

IPinfo is a free IP geolocation, network, and ASN lookup tool used by millions of developers and operators worldwide.

it-tools.tech

IT Tools is an open-source collection of 80+ privacy-focused developer utilities — formatters, generators, encoders, network calculators, and converters — that run entirely in your browser.

iconking.net

Browser-based tool for converting SVG icons into Lottie animations with motion presets.

icyzip.com

Transfer text and files between devices via browser with QR code pairing and end-to-end encryption.

imagetocrochetpattern.com

Convert photos into editable, printable crochet color grids directly in your browser.

imageconver.com

Free online image toolkit for converting, compressing, resizing, cropping, watermarking, and editing images.

imagetoolspro.in

imagevideofit.com

ImageVideoFit.com hosts Image Resizer, a tool for resizing images and videos to fit specific dimensions or file size requirements.

inchcalculator.com

Inch Calculator is a useful resource for various measurement and conversion needs, offering tools like BHP to kW conversion, BTU Calculator, and Baluster Calculator among others.

indeed.com

Indeed offers salary insights and pay range estimates based on its salary database. ([indeed.com](https://www.indeed.com/job-search-services/salary-calculator-6ycjb?utm_source=openai))

infyways.com

Infyways.com hosts a collection of online tools for content creators, offering a BBCode Viewer to preview formatted text and a BBCode to HTML converter to translate coding into readable web pages.

freeinstagramgridmaker.com

Split photos into Instagram profile grid tiles locally in your browser.

instantcalculators.net

InstantCalculators.net hosts a collection of useful online calculators, including an Atomic Mass Calculator and a Bearing to Azimuth Angle Converter, for quick reference and easy use.

instrumentation-tools.com

Instrumentation-tools.com provides instrumentation and measurement resources with online tools like an SI Prefix Converter. ([instrumentation-tools.com](https://www.instrumentation-tools.com/pages/tools/Measurement/prefix.html))

insure.com

Insure.com is an established insurance information and comparison site covering auto, health, home, and personal finance topics.

intmath.com

intmath.com hosts Interactive Mathematics (IntMath), offering educational resources and tools for mathematics learners, including a BAI Calculator to help assess body fat percentage.

internetspeedgeo.com

Fast, browser-based internet speed test measuring ping, download, upload, and jitter with provider comparisons.

inventivehq.com

Free cybersecurity tools, calculators, and resources for IT professionals across security, network, developer, planning, media, compliance, and assessment categories

ironhorsefunding.com

Ironhorse Funding focuses on powersports financing and refinancing, offering resources for borrowers considering loans for vehicles like ATVs. It provides online information and prequalification options for customers. ([ironhorsefunding.com](https://ironhorsefunding.com/loan-calculator-powersports-atv/))

isitopentoday.com

Check if stores, banks, and pharmacies are open right now without logging in.