🧮 Free Online Tool

Smart Calculator Hub
— All Modes, One Place

Standard, Scientific, Programmer, Unit Converter & Financial — all in one place, no login needed.

M
STD
0
No history yet
From
To
Principal (₹/$)
Rate (% p.a.)
Time (years)
Compounds/yr
Final Amount
Interest Earned
Effective Rate
Loan Amount
Rate (% p.a.)
Tenure (months)
Monthly EMI
Total Payment
Total Interest
Bill Amount
Tip %
Split among
Tip Amount
Total Bill
Per Person
About This Tool

The Only Calculator You'll Ever Need — All Modes, One Place

Whether you're a student crunching trigonometry, a developer converting hex values, a traveller converting kilometres to miles, or a professional working out loan EMIs — the Smart Calculator Hub handles it all instantly, right in your browser.

Switch between five modes with a single click and carry your calculation history throughout your session. Fully keyboard-accessible, mobile-friendly, and no login required.

Top Features at a Glance
🔢
Standard CalculatorArithmetic, %, parentheses, ±, 1/x, full MC/MR/M+/M− memory.
🔬
Scientific ModeTrig, log, ln, √, xⁿ, eˣ, n!, π, e — DEG/RAD/GRAD toggle.
💻
Programmer ModeHEX, DEC, OCT, BIN with bitwise AND, OR, XOR, NOT, shifts.
📐
Unit Converter50+ units across Length, Weight, Temp, Area, Volume, Speed & more.
💰
Financial CalculatorCompound interest, loan EMI, and tip / bill splitter.
📜
Calculation HistoryScrollable session log — click any entry to recall it instantly.
⌨️
Keyboard SupportType normally — Enter to calculate, Backspace to delete, Esc to clear.
📱
Mobile ResponsiveWorks perfectly on phones, tablets, and desktops.
Frequently Asked Questions

Yes — no registration, no subscription, no usage limits. Open the page and start calculating. Your session history stays available until you close the tab.

Switch to Scientific mode and tap DEG, RAD, or GRAD at the top before using any trig function. All functions — sin, cos, tan and their inverses — update instantly.

Click Financial → Loan / EMI. Enter your loan amount, annual interest rate, and tenure in months, then hit Calculate EMI to see the monthly instalment and total interest.

Yes. Select HEX, DEC, OCT, or BIN and the live base bar updates in real time. Bitwise AND, OR, XOR, NOT, NOR, shift left/right, and MOD are all supported.