Who we are

CalculatorAtoZ is owned, developed, and maintained by Softusvista. The calculators on this website are powered by UnitsConverters.com, so every tool supports quick, seamless unit conversions (e.g., SI ↔ Imperial, metric prefixes, derived engineering units) directly within the calculation flow. This helps eliminate manual conversion errors, keeps inputs/outputs consistent, speeds up coursework and professional workflows, and makes results comparable across industries and standards—without switching tabs or hunting for separate conversion tables.

What we do

35,000+ calculators—from elementary subjects (Mathematics, Physics, Chemistry) to Engineering, Health, Finance, and more.

16+ million calculations completed by students, teachers, professionals, and lifelong learners.

900+ free downloadable PDFs that group important calculators into topic-wise handbooks/quick-revision sheets, with formulas, worked examples, and variable definitions.

Coverage at a glance

Engineering

Mechanical, Production, Aerospace; Civil, Structural, Environmental; Chemical, Metallurgical; Electrical and Electronics.

Elementary Subjects

Mathematics (including 2D & 3D Geometry), Physics, Chemistry.

Health

Fitness, Heart, Lung Physiology, Pathology, Weight.

Finance

Banking, Investment, Loan, Mortgage & Real Estate, Tax, Financial Modeling & Valuation, Fixed Income, Public Finance, Equity, Business.

Who builds these calculators

Our calculators are created and verified by domain-trained contributors and editors:

• Elementary-school calculators (Math, Physics, Chemistry) are authored by people who excelled academically and earned admission to top-tier undergraduate programs.
• Engineering calculators are built by graduates and post-graduates from the respective branches at reputed engineering colleges.
• Finance calculators are created by contributors with years of hands-on experience in finance and accounting.
• Health calculators are produced with input from healthcare professionals.

You can browse our public Credits page to see the depth and breadth of contributors—starting with IITs such as IIT Madras, IIT Bombay, IIT Delhi, IIT Kanpur, IIT Kharagpur, IIT Roorkee, IIT Guwahati, IIT (ISM) Dhanbad, IIT (BHU) Varanasi, IIT Mandi, and IIT Patna; IIITs including IIITDM Jabalpur, IIIT Bhopal, and IIIT Guwahati; NITs including NITK Surathkal, NIT Warangal, NIT Tiruchirappalli, NIT Hamirpur, NIT Calicut, NIT Jamshedpur, NIT Srinagar, MNNIT Allahabad, MNIT Jaipur, SVNIT Surat, NIT Manipur, NIT Agartala, NIT Meghalaya, and NIT Durgapur; and other reputed institutions that regularly feature in NIRF rankings such as BITS Pilani, VIT Vellore, Delhi Technological University (DTU), Netaji Subhas University of Technology (NSUT), COEP Pune, PSG College of Technology, Osmania University, SGSITS Indore, Walchand College of Engineering, RV College of Engineering, and BMS College of Engineering.

Transparency: Individual credit entries publicly display who created and who verified calculators—showcasing a double-check process across thousands of items.

Editorial & quality process

• Sourcing & formulation: Each calculator encodes a clear formula with defined variables and units.
• Peer verification: Separate contributors review and verify each calculator (creation/verification counts are recorded on Credits).
• Examples & units: Consistent unit handling plus worked examples; many topics also have downloadable formula PDFs for classroom revision or quick professional reference.
• Breadth & organization: Topic hubs (e.g., Finance, Health, major Engineering branches) help users quickly find the right tool.

Why CalculatorAtoZ is a trustworthy choice

• Depth + scale: One of the largest public repositories of calculators online, continuously expanded and maintained.
• Unit-conversion built-in: Powered by UnitsConverters.com for reliable, on-the-spot unit handling across disciplines.
• Open access: Completely free to use—no registration or sign-in required.
• Privacy-first: We do not store user inputs or results on our servers.
• Global utility: Equally useful for coursework, labs, fieldwork, design offices, clinics, and finance teams.

Our broader track record (Portfolio & Affiliates)

Softusvista’s experience spans calculators, data tools, and visualization products used by millions. Representative properties include UnitsConverters.com, DistancesFrom.com, TaxiAutoFare.com, IFSCCodeBank.com, BankMICRCode.com, PinCodeIn.com, BarGraphMaker.net, and PieChartMaker.com. Explore more on our Portfolio and Affiliate Websites pages to see the breadth of domains and longevity of our products.

Contact us

We’re easy to reach. Use the Contact form for feedback, collaboration, corrections, or to contribute new calculators. For more details, visit our About, Terms, and Privacy Policy pages.