Smart Calculators for Everyday Decisions
Calculate loans, investments, taxes, salary, health metrics, conversions and everyday problems instantly — free, private and in your browser.
🧮 Quick Calculators
Basic
Type directly with your keyboard (numpad works too) and press Enter, or tap the buttons. Supported functions: sin cos tan ln log sqrt abs exp · constants: π e.
Scientific
Type directly with your keyboard (numpad works too) and press Enter, or tap the buttons. Supported functions: sin cos tan ln log sqrt abs exp · constants: π e.
🔥 Popular Calculators
EMI Calculator
Calculate monthly EMI, total interest and total repayment for any loan.
📆SIP Calculator
Future value of a Systematic Investment Plan (monthly mutual fund investment).
🧾GST Calculator
Add GST to a base price or extract it from an inclusive price.
🎂Age Calculator
Exact age in years, months, days — plus total days lived.
⚖️BMI Calculator
Body Mass Index with WHO category and healthy weight range.
％Percentage Calculator
% of a number, what percent X is of Y, or percentage change.
📈Compound Interest Calculator
Growth of a lump sum with yearly → daily compounding frequencies.
🏛️Income Tax Calculator (New Regime)
Estimate income tax under India's New Regime, FY 2025-26 slab structure.
🍽️TDEE / Calorie Calculator
Daily calorie targets to maintain, lose or gain weight.
🏛️FD Calculator
Fixed Deposit maturity value with quarterly/monthly/yearly compounding.
💼Salary Calculator (Hourly ↔ Annual)
Convert between hourly pay and annual salary — works with any currency.
🏷️Discount Calculator
Sale price and savings after a discount, plus reverse discount lookup.
🗂️ Browse by Category
Finance
Interest, investment growth and everyday money math.
4 calculators
🏦Loans
EMI, affordability and loan repayment planning.
3 calculators
📈Investments
SIP, FD, RD, CAGR and long-term wealth tools.
7 calculators
🧾Tax
GST, VAT and income tax estimates with clear rule versions.
3 calculators
💼Salary
Hourly ↔ annual pay, hikes, gratuity and take-home estimates.
3 calculators
🧮Mathematics
Basic to scientific calculators plus percentages and ratios.
11 calculators
❤️Health
BMI, calories and body metrics. Informational only.
7 calculators
🏋️Fitness
Training and nutrition numbers.
1 calculator
🎓Education
Marks, GPA/CGPA and grade conversions.
3 calculators
🏢Business
Pricing, margins, break-even and profitability.
3 calculators
🧱Construction
Concrete, bricks, paint and material estimates.
1 calculator
🔄Conversion
Metric ↔ imperial units for length, weight, volume and more.
7 calculators
💱Currency
Live exchange rates and multi-currency calculations in USD, EUR, GBP, INR and more.
1 calculator
⏰Time & Date
Age, date differences and durations.
3 calculators
🚗Transportation
Fuel costs, mileage and trip planning.
3 calculators
💡Utilities
Electricity and household running costs.
1 calculator
💻Technology
Data storage and computing units.
2 calculators
🛒Everyday
Tips, bills and daily-life quick maths.
3 calculators
📐Statistics
Averages, spread and distributions.
1 calculator
Why Use Calculator ProHub?
Instant results
Every keystroke recalculates — no submit buttons, no waiting.
Accurate formulas
Standard financial and scientific formulas with transparent math shown on every page.
Mobile friendly
Thumb-sized inputs and prominent results designed phone-first.
Privacy focused
Calculations happen in your browser. We never store what you type.
Free forever
No accounts, no paywalls, no limits on usage.
Shareable results
Your inputs live in the URL — copy a link or share straight to WhatsApp.
How It Works
Choose a calculator
Browse by category or search by name — including Hindi keywords like “कर्ज” or “जीएसटी”.
Enter your values
Clear labels with sensible examples; results update as you type.
Get instant answers
See the main result up front with supporting breakdowns you can copy or share.
Frequently Asked Questions
Is Calculator ProHub free to use?
Yes — every calculator is completely free with no registration. The site is supported by unobtrusive advertising that never interferes with calculations.
Are my numbers stored or sent anywhere?
No. Calculations run locally in your browser using JavaScript. We do not transmit or store your inputs unless you explicitly create a share link.
How accurate are the results?
Each calculator uses its standard published formula (EMI annuity formula, Mifflin-St Jeor for BMR, statutory GST slabs, etc.). Tax calculators clearly label the applicable financial year since rules change annually.
Can I use these calculators offline?
Once loaded, most calculators keep working without a connection because all maths runs client-side. Only the currency converter needs internet to fetch live exchange rates.
Do you support Indian number formatting?
Yes — money results display in the lakh/crore system (₹1,25,000) rather than Western thousands grouping.