Basic Calculator
Add, subtract, multiply, divide — with history and keyboard support
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Calculate with a real keypad, estimate EMI and interest, find age or date spans, and check BMI — entirely in your browser. Free, private, and no sign-up. For unit conversion, use Converters (linked below).
by NeedAnyToolAdd, subtract, multiply, divide — with history and keyboard support
Trig, logs, powers, roots — DEG/RAD mode
Percent of, reverse percent, and percent change
Tip amount, total, and split between people
Sale price and amount saved from a percent off
Mean, median, mode, min, and max from a list
Monthly EMI, total interest, and payment breakdown
Interest and total amount with the SI formula
Compound growth with yearly to daily compounding
Exact age in years, months, and days
Calendar span between two dates
Body mass index with WHO adult categories
Image and PDF conversion tools live in their own categories — we link them here instead of duplicating pages.
Length, weight, temperature, and more — in Converters
Epoch ↔ human dates — in Converters
Decimal, hex, binary, octal — in Converters
Data never leaves your browser.
Results in milliseconds.
No server upload ever.