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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.
mathcelebrity.com
mathcelebrity.com hosts an array of math calculators and tools designed to solve complex problems quickly. With features like a Benford's Law Calculator and an Associative Property Calculator, it offers practical solutions for students and professionals alike.
mathcracker.com
mathcracker.com hosts a collection of math tools, including a Bayes' Theorem Calculator and a Row Echelon Form Calculator to help with statistical analysis and linear algebra.
mathda.com
MathDA.com hosts a collection of conversion tools for various units, including time (Au to Light minutes), radiation (Becquerel to Curie), and metric prefixes (Atto to Zepto).
mathgptpro.com
Mathos AI is an educational platform offering tools to help solve complex mathematical problems. Their Bessel Function Calculator allows users to compute values for this type of function, aiding in advanced mathematics and engineering applications.
matrixcalcu.com
MatrixCalcu is a matrix-focused calculator site offering many linear algebra operations. ([matrixcalcu.com](https://matrixcalcu.com/en/matrix-rref-calculator?utm_source=openai))
maxicalculator.com
Maxi Calculator is a comprehensive online tool suite offering a variety of calculators for different purposes, including Average Atomic Mass, BSFC (Brake Specific Fuel Consumption), Bedridden Patient Height, Belt Size, Bag, and Bessel Function calculations. Ideal for students, professionals, and anyone needing quick, accurate calculations across various fields.
mayoclinic.org
Mayo Clinic is a healthcare institution providing comprehensive medical and health information. It hosts educational tools like the BEE Calculator to assist with weight management calculations.
mccoys.com
mccoys.com hosts McCoy's Building Supply, offering practical tools for DIY enthusiasts and professionals. Their BTU Calculator helps determine heating needs efficiently.
mechanicalc.com
MechaniCalc hostsBeam Deflection Calculator, an online tool for engineers and students to determine the deflection of beams under various loads.
medicalcalculatorhub.com
Medical Calculator Hub is a website offering various medical calculators, including the Berg Balance Test Calculator, to aid healthcare professionals in accurate assessments and treatments.
medicalalgorithms.com
MedicalAlgorithms.com hosts BODE Index Calculator, a tool for evaluating respiratory muscle strength in patients with chronic obstructive pulmonary disease (COPD).
reference.medscape.com
Medscape Reference is a comprehensive medical resource website that offers various calculators and tools to assist healthcare professionals in making informed decisions. Their collection includes the BODE Index Calculator for assessing lung function and the BSA Calculator – Body Surface Area for determining body size in medical calculations.
metric-conversions.org
Metric Conversions is a comprehensive unit-conversion site covering length, weight, volume, area, temperature, speed, time, angle, pressure, and energy with formulas and conversion tables.
metric-converter.com
Metric Converter.com hosts useful tools for converting temperatures, distances, and other measurements between various units, such as 0 degrees Celsius to Fahrenheit or barrel beer to gallons.
developer.microsoft.com
Microsoft Graph Explorer is developer.microsoft.com's tool for exploring and interacting with Microsoft Graph API resources, including generating Azure AD PowerShell scripts.
milkcalculator.com
MilkCalculator.com hosts tools to help parents manage their baby's feeding schedule. It includes a Baby's Milk Intake Calculator and a Baby Formula Calculator to assist in determining appropriate feedings based on age, weight, and developmental stage.
mindchecktools.com
Offers free, private mental health self-checks with answers processed in the browser. ([mindchecktools.com](https://www.mindchecktools.com/audit-alcohol-test))
miniwebtool.com
MiniWebtool.com hosts a collection of five handy online calculators designed to simplify various tasks. From converting astronomical units to calculating batting averages, these tools offer quick and accurate results for a range of needs.
miro.com
Miro.com hosts a bar graph maker and other visual collaboration tools to help teams create and share digital content together.
mobilefish.com
mobilefish.com hosts Battery Charge Time Calculator, helping users determine how long it will take to charge their devices based on various factors.
mockaroo.com
Mockaroo generates realistic mock data for application testing — across CSV, JSON, SQL, Excel, and dozens of other formats.
modern.place
Modern.Place is a platform hosting various tools to assist users in their daily tasks. One example tool converts beam angle to coverage light, helping with lighting calculations.
modern60.com
Modern60.com hosts BIMS Calculator – Brief Interview for Mental Status, a tool to assess mental health through a series of questions.
mommyhood101.com
mommyhood101.com hosts a Baby Percentile Calculator to help parents track their child's growth and development against national averages.
moodfabrics.com
Mood Fabrics is a website offering practical tools for managing everyday tasks and organizing daily routines. It provides a Bag Calculator to help users plan what to pack in their bags for trips or outings, ensuring they have everything they need while minimizing clutter.
morningstar.com
Investment research and portfolio analysis site. ([portfolio.morningstar.com](https://portfolio.morningstar.com/RtPort/Free/InstantXRayDEntry.aspx?utm_source=openai))
mortgage-calculator.net
Mortgage-Calculator.net is a website that provides various financial tools for home buyers and homeowners. Their Bi-Weekly Mortgage Payment Calculator helps users estimate their monthly mortgage payments if they choose to make bi-weekly instead of monthly payments.
mortgagecalculator.org
MortgageCalculator.org hosts tools to help homebuyers calculate their mortgage payments, including a bi-weekly payment calculator and a balloon payment calculator.
macu.com
Mountain America Credit Union offers consumer banking and lending products, including vehicle loans. Its ATV loan page highlights financing details for new and used ATVs. ([macu.com](https://www.macu.com/loans/vehicle-loans/atv))
mynextmove.org
mynextmove.org hosts a career personality quiz designed to help individuals explore potential careers based on their interests and skills.
mybikefitting.com
mybikefitting.com hosts a Bike Fit Calculator to help cyclists optimize their seating position for comfort and performance on the road.
mymonthlycycles.com
MyMonthlyCycles.com hosts a BBT Calculator tool to help track and understand your basal body temperature for fertility awareness and menstrual cycle management.
myvelofit.com
MyVeloFit is a parent site hosting a bike fit calculator tool designed to help cyclists optimize their seating and handlebar positions for better comfort and performance on the road.
nasm.org
NASM (National Academy of Sports Medicine) is a widely recognized fitness education organization offering certifications, resources, and training tools.
nhlbi.nih.gov
NHLBI (National Heart, Lung, and Blood Institute) is a government resource providing health information and tools to manage heart, lung, and blood conditions. It includes calculators like BMI for men and women to assess body mass index.
nhs.uk
nhs.uk provides health resources and tools for individuals, including calculators for BMI in both teen and child age groups to help with weight management.
nerdwallet.com
NerdWallet's personal finance calculators span mortgages, credit cards, banking, loans, retirement, taxes, and net worth — backed by their broader financial education content.
nestlefamilynes.info
Nestle FamilyNes.info hosts Baby Eye Color Calculator, helping parents predict their baby's eye color based on genetic information from both parents.
neurotoolkit.com
NeurologyToolKit is a resource for neurologists and medical professionals, offering a variety of tools to aid in diagnosis and treatment planning. Their collection includes the Barthel Index Calculator, which helps assess a patient's functional abilities after illness or injury.
newtum.com
Newtum offers an array of developer and productivity sub-products — an online compiler, code formatter, API tester, typing tutor, PDF toolkit, and an extensive calculators and converters library.
nmtoftlbs.com
Nm to Ft-Lbs Converter is a domain that offers a Newton-Meters to Foot-Pounds Converter tool to help users convert torque units between newton-meters and foot-pounds.
nosme.pro
Nosme.pro hosts Subtitle Translator, an online tool for converting subtitles between different languages without requiring manual translation.
numberconvert.com
Number Convert is a comprehensive site hosting over 1300 conversion tools for various units including acceleration, gravity, and more. Tools like Centigal to m/s² Acceleration Converter and Kilogal to m/s² Acceleration Converter help in converting different units efficiently.
numbernest.pro
Number Nest is a platform that offers various educational tools to help learners practice and improve their numerical skills. One of its sample tools is the Bean Bag Filling Calculator, which aids in understanding basic arithmetic operations through an interactive game-like interface.
oanda.com
OANDA offers foreign exchange data services and a web-based currency converter using OANDA Rates. ([oanda.com](https://www.oanda.com/currency-converter/en/?utm_source=openai))
ofx.com
OFX provides foreign exchange services and public exchange rate pages for currency pairs. ([ofx.com](https://www.ofx.com/en-us/exchange-rates/aud-to-nzd/?utm_source=openai))
otdude.com
OT Dude is a platform offering various online tools for healthcare professionals and researchers. Their sample tools include a Berg Balance Test Calculator and a BIMS Calculator – Brief Interview for Mental Status, designed to assist in patient assessments and evaluations.
offlinewebtools.com
Offline Web Tools is a site providing essential tools for offline use, including a Bearing Calculator to help with mechanical and engineering calculations when you don't have internet access.
omnicalculator.com
Omni Calculator is a comprehensive tool site hosting over 3855 calculators across various categories including finance, health, technology, and more. From insulation calculations to Pokémon Go candy counters, it offers practical tools for everyday problem-solving.
omnicalculator.space
Collection of free online calculators and converters, including science/education tools. ([omnicalculator.space](https://omnicalculator.space/light-year-conversion-calculator/))
onebox.tools
OneBox.Tools is a site that hosts various online tools for encoding and decoding data. It includes a Base64 to Binary converter as an example of its functionality.
onedev.tools
onedev.tools hosts two essential developer tools: a .gitignore Generator and OneDev Developer Tools Suite, providing resources for managing code repositories and streamlining development workflows.
onlinetools.com/binary
Online Binary Tools is the OnlineTools.com sub-site for binary numbers — conversion, bitwise operations, encoding, IP and string transformations, and Gray code support.
onlinetools.com/csv
Online CSV Tools is the CSV-specific arm of the OnlineTools.com family with 30+ tools for converting, encoding, manipulating columns, and validating CSV files.
online-calculator.org
Online Calculator.org hosts a variety of useful tools for users, including a Batting Average Calculator to help with sports statistics.
onlinegiftools.com
Online GIF Tools is a focused suite of 100+ browser-based GIF utilities — frame editing, conversions, animation speed control, format converters, and analysis tools.
onlinetools.com/hex
Online Hex Tools is the OnlineTools.com sub-site dedicated to hexadecimal numbers — conversion between bases, encoding, bitwise operations, and hex-IP/colour handling.
onlinejpgtools.com
Online JPG Tools is a focused suite of 80+ browser-based JPG/JPEG utilities — conversion, resizing, colour adjustment, watermarking, and JPEG-specific artifact tools.
onlinetools.com/json
Online JSON Tools is the JSON-specific arm of the OnlineTools.com family, hosting 35 focused single-purpose tools for inspecting, transforming, encoding, and analysing JSON data.
onlinetools.com/math
Online Math Tools is the OnlineTools.com sub-site for math — number sequence generators, fractals, space-filling curves, constants, matrix operations, and visualisations.