Finance, health, physics, math, converters and everyday tools — all free, all in one place.
Full-featured with trigo, log, powers & more
Monthly payment, total interest & schedule
Future value of your investment
Systematic Investment Plan returns
Add or extract GST from any amount
Final price after any discount
Profit, loss, margins & markup
P × R × T / 100
Return on Investment
Body Mass Index & healthy weight range
Daily calorie needs by activity level
Daily water recommendation
Training zones from max heart rate
Voltage · Current · Resistance · Power
Fill any TWO fields and leave one blank.
KE = ½mv²
Range, height & time of flight
Monthly cost of any appliance
F = ma, work, power
All percentage problem types
Area, perimeter & volume of shapes
ax² + bx + c = 0
Mean, median, mode, std dev & more
Decimal ↔ Binary ↔ Hex ↔ Octal
Least common multiple & greatest common divisor
°C · °F · K · °R
m, km, miles, feet, inches, cm, mm, nm
kg, lb, g, oz, ton, stone
km/h, mph, m/s, knots, ft/s
sq ft, sq m, acres, hectares, bigha
Bytes, KB, MB, GB, TB
Exact age in years, months, days
Days, weeks, months between two dates
Calculate tip and split between people
Estimate trip fuel cost
Live time across major cities
Best value per unit between two products
Product A
Product B
Cement, sand, aggregate for concrete
The most comprehensive free calculator hub on the web.
CalcMaster Pro gives everyone — students, professionals, investors, homeowners — instant access to accurate calculation tools, with no ads, no sign-up and no paywall.
From figuring out your monthly loan EMI to solving a physics problem or converting units for a recipe, we've got you covered in one clean, fast interface.
CalcMaster Pro started when our team noticed that most online calculators were cluttered with required sign-up, or simply gave wrong answers. We decided to build the tool we always wanted.
Today CalcMaster Pro is used daily by students, engineers, finance professionals, and everyday people across India and worldwide.
Every formula is verified against authoritative sources — standard textbooks, government health guidelines, and established financial standards. We welcome error reports via our Contact page and fix confirmed issues within 3 working days.
The people who build and maintain CalcMaster Pro.
Founder & Lead Developer
We're looking for developers, designers and domain experts who care about building genuinely useful tools. Reach out via our Contact page.
Questions, suggestions, or bug reports? We'd love to hear from you.
We typically respond within 24–48 hours on working days.
Craftercc369@gmail.com
Within 24–48 business hours
24/7 — always accessible online
Confirmed bugs fixed within 3 working days
Last updated: June 2025
By accessing CalcMaster Pro you agree to these Terms. If you disagree, please do not use the service.
Calculator results are estimates based on standard formulas. They do not replace professional advice from qualified financial advisors, doctors, engineers or other licensed professionals.
BMI, calorie, water-intake and heart-rate tools provide general estimates only. They are not diagnostic or medical tools. Consult a healthcare professional for medical advice.
Loan, SIP and investment calculators produce estimates. Actual figures from financial institutions may vary. CalcMaster Pro is not a registered financial advisor.
All calculations run in your browser. No input data is transmitted to or stored on our servers.
All design, content and code is the intellectual property of CalcMaster Pro. Unauthorised reproduction or redistribution is prohibited.
CalcMaster Pro is not liable for direct, indirect, incidental or consequential damages arising from use of or reliance on the service.
We may update these Terms at any time. Continued use constitutes acceptance of the revised Terms.
Questions about these Terms? Email hello@calcmasterpro.com or use our Contact page.