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Tools in this directory come from 658+ source sites — from established names like Calculator.net and Omni Calculator to specialised single-purpose tools.
01logic.ca
01logic.ca hosts Backup Recovery Time Calculator, a useful tool for estimating how long it will take to recover data after a backup failure.
1000calculators.com
1000calculators.com hosts a variety of calculators, including a Beta Stock Calculator for evaluating stock options.
10015.io
10015.io is an all-in-one toolbox of 70+ free online utilities covering text manipulation, image editing, CSS generators, code formatting, colour design, and social-media mockup makers — all running in the browser with no signup.
123test.com
123test.com hosts educational and personality assessment tools designed to help users understand themselves better and make informed decisions about their careers and personal growth.
16personalities.com
16personalities.com hosts personality quizzes and tools to help users discover their strengths, weaknesses, and potential career paths based on their unique personalities.
24picture.com
Free in-browser image conversion, resizing, and editing tools.
24timezones.com
24timezones.com hosts time zone conversion tools like BST and Beijing time now, allowing users to easily convert times between different global locations.
3roam.com
3ROAM.com hosts a Baud Rate Calculator tool to help users determine the optimal data transfer rate for their devices and connections.
5paisa.com
Indian discount brokerage offering market tools, calculators, and learning resources. The site maintains a calculators section for common finance needs. ([5paisa.com](https://www.5paisa.com/calculators/apy-calculator?utm_source=openai))
99tools.net
99tools.net hosts a small selection of useful online tools, including Base64 to TSV and Audio to Base64 converters. These handy utilities help with data conversion and audio manipulation tasks.
teachchemistry.org
AACT is a professional chemistry education platform by the American Chemical Society, providing classroom resources and interactive learning materials.
aatbio.com
aatbio.com provides scientific tools for educators and students, including a Beer-Lambert Law Calculator to help understand light absorption in solutions.
abclocal.go.com
ABC Local / ABC News Interactive is a news website that hosts interactive tools to help users understand and navigate complex information. One example includes the Biden’s Vaccine Plan Calculator, allowing users to explore different vaccination strategies and their potential impacts.
acalculate.com
ACalculate.com hosts BTU Calculator, an online tool to convert and calculate British thermal units for heating and cooling applications.
aetechron.com
AE Techron is an engineering company site that hosts a set of free technical calculators. Its calculators section includes conversion tools for electrical measurements. ([aetechron.com](https://aetechron.com/calculators/voltage-db-converter/))
aidevhub.io
AI Dev Hub hosts a suite of developer-focused tools to help streamline and automate various tasks in software development. One of its notable features is the .env File Generator, which simplifies the creation and management of environment variables for different project configurations.
aigeneratestand.com
AI Generate Stand is a website offering a name generator tool to help create unique names for various purposes, such as business entities, social media accounts, and more.
ai-prompt-master.com
AI Prompt Master is an AI-powered tool that generates image prompts for creative projects and design ideas. The site hosts a sample tool called Image to Prompt Generator, which helps users create unique descriptions based on uploaded images.
alvaindustries.com
ALVA Industries offers practical conversion tools for electrical measurements, including converting AWG to Mm², aiding professionals in accurately calculating wire sizes.
anyjson.in
ANYJSON.in hosts Base64 to JSON converters and other data conversion tools to simplify working with different formats.
apivoid.com
APIVoid is a platform offering various online tools to help with web development and security tasks. It includes an Audio to Base64 converter for encoding audio files into base64 format.
arin.net
arin.net hosts ARIN Whois/RDAP Search, offering a tool to look up BGP AS information through the Resource Description and Access Protocol (RDAP) system.
asdipsoft.com
ASDIP Soft develops structural engineering software for concrete, steel, wood, and foundation design workflows. It also publishes free web tools for common structural calculations.
auditscreen.org
Non-commercial public-service site focused on the AUDIT, with resources and an interactive self-test. ([auditscreen.org](https://auditscreen.org/about/faqs?utm_source=openai))
azcalculator.com
AZCalculator is a broad free calculator directory covering math, finance, health, and engineering tools with straightforward single-purpose calculators.
tools.aback.ai
Aback Tools is a collection of 650+ free utilities for developers and designers that run in the browser. ([tools.aback.ai](https://tools.aback.ai/tools/audio-sample-rate-converter))
accuratecalculators.com
Calculator site that hosts a historical investment returns calculator for comparing asset classes. ([accuratecalculators.com](https://accuratecalculators.com/historical-investment-calculator?utm_source=openai))
activecalculator.com
activecalculator.com hosts online calculators for various purposes, including a Battery Capacity Calculator and a Batting Average Calculator, offering quick and easy calculations for everyday needs.
addictioncenter.com
AddictionCenter.com hosts online calculators to help assess potential alcohol use disorder. The Audit-C Calculator evaluates risk of being an alcoholic, while the Audit Score Calculator provides a general assessment based on specific questions. These tools aim to support individuals in understanding their own health status related to substance use.
adkcreditunion.com
Adirondack Regional FCU offers loans for motorcycles and ATVs along with other consumer banking services. Its loan page provides rates and guidance for ATV financing. ([adkcreditunion.com](https://adkcreditunion.com/loans/motorcycles-atvs))
adobe.com
Adobe Express is a suite of online tools for creating and editing visual content. It offers a bar graph maker to help you visualize data and a banner size calculator to ensure your graphics fit perfectly on various devices.
advancedconverter.com
AdvancedConverter.com offers handy online conversion tools like Barrel Per Minute to Lpm and Atmospheres to PSI Pressure converters. Ideal for quick unit conversions across various categories.
ahmadfreetools.com
Ahmad Free Tools is a website hosting various educational and recreational tools. One notable tool it offers is the Barn-Pole Paradox, an interactive puzzle designed to challenge problem-solving skills.
airwallex.com
Airwallex is a financial technology platform offering tools to help businesses manage their global payments and currency conversions efficiently. Their Aud to JPY Currency Converter allows users to quickly convert Australian Dollars to Japanese Yen, facilitating cross-border transactions.
ajaxcalculators.com
ajaxcalculators.com hosts an assortment of calculators including Atom Calculator for chemical reactions, BC to AD Calculator for dating historical events, and Benadryl Dosage Calculator for Dogs to help determine appropriate medication dosages for canines.
ajelix.com
Business analytics and KPI tooling company that also provides free online calculators. ([ajelix.com](https://ajelix.com/calculators/turnover-rate-calculator/?utm_source=openai))
akynocalculator.com
Akyno Calculator is a user-friendly website that hosts various handy tools for daily use. It includes a Bathroom Mirror Size Calculator and a Balloon Arch Calculator to assist with practical tasks.
alcoholaddictioncenter.org
Alcohol Addiction Center hosts a BAC Calculator to help users understand their blood alcohol content and assess potential risks associated with drinking.
alcohol.org
Alcohol.org hosts educational resources and tools for understanding alcohol consumption. Their BAC Calculator helps users estimate their Blood Alcohol Content based on factors like weight and drinking history.
allinonecalculator.io
All In One Calculator.io offers a suite of handy tools for quick calculations. Sample features include a Pool Salt Calculator to determine how much salt is needed and a Cost Per Ounce Calculator to find the price per ounce of items. Ideal for saving time on everyday math tasks.
allunits.net
AllUnits.net is a unit converter site with multilingual navigation and category-based conversions. It provides dedicated pages for specific unit pairs. ([allunits.net](https://allunits.net/en-US/length/au-to-km/))
alpertron.com.ar
Alpertron.com.ar hosts a Big Number Calculator for performing arithmetic operations with very large integers, ideal for number theory and cryptography enthusiasts.
cancer.org
The American Cancer Society is a leading nonprofit health organization focused on cancer prevention, education, research funding, and patient support.
angelone.in
Indian brokerage and financial services platform with education and calculators for investors. It offers tools and guides for personal finance decisions, including pensions. ([angelone.in](https://www.angelone.in/calculators/apy-calculator?utm_source=openai))
angrybbq.com
AngryBBQ.com provides practical tools for hosting backyard BBQs, including a handy BBQ party calculator to help organize and plan your next gathering.
anytospeech.com
AnyToSpeech.com hosts an Audiobook Speed Calculator tool to help users adjust playback speeds without changing pitch.
apidog.com
apidog.com hosts Azure AD PowerShell Generator, a tool for generating PowerShell scripts to manage Azure Active Directory resources.
appdevtools.com
AppDevTools is a free online toolkit for developers with utilities across formatting, encoding/decoding, validation, conversion, and security workflows.
areacalculators.com
Area Calculators.com hosts a suite of geometric calculators to help users find areas of various shapes, including a Basal Area Calculator for circles and other shapes.
area-converter.com
Area-Converter.com hosts Bigha to Square Meters Converter and similar tools for converting area measurements between various units.
ascend.org
Ascend Federal Credit Union provides recreational vehicle loans, including ATV loans, with published features and rates for members. The ATV loan page organizes resources such as features, rates, and tools. ([ascend.org](https://ascend.org/consumer-loans/recreational-loans/atv-loans))
products.aspose.app
products.aspose.app hosts Aspose Products, offering a range of online tools for converting file formats and manipulating data, such as BMP to Base64 and Base64 to HTML.
tools.atatus.net
Atatus Tools is a platform offering various utility tools to help with different tasks online. One such tool is Base64 to YAML converter, which facilitates the conversion of Base64 encoded data into YAML format for easy readability and manipulation.
atbashcipher.com
A dedicated site for the Atbash cipher with an online converter and educational context about the cipher. ([atbashcipher.com](https://atbashcipher.com/))
attendme.ai
AttendMe.ai hosts Audit-C Calculator, helping users assess their potential alcoholism with a quick and confidential quiz.
audiobookspeedcalc.com
audiobookspeedcalc.com hosts an Audiobooks Calculator to help you manage your commute time by adjusting audiobook playback speeds.
audiobooktimecalculator.com
Audiobook Time Calculator is a site offering an Audiobook Speed Calculator tool to help users adjust playback speeds for their audiobooks without changing the original audio file.
autocalcs.com
AutoCalcs.com hosts online calculators for engineering and construction projects, including a Bending Stress Calculator to help with structural analysis.
autotrader.com
Autotrader.com hosts an array of automotive tools to help car buyers and sellers make informed decisions. Their offerings include calculators for auto leases, loans, and payments, providing essential data for financial planning related to vehicles.
axisbank.com
Axis Bank provides financial calculators and tools to help customers manage their finances effectively. Their Bike EMI Calculator allows users to estimate monthly payments for purchasing a bike.